fix: disable callback URLs with protocols "javascript" and "data"

release: 2.5.0
chore(translations): update translations via Crowdin (#1395 )
2026-03-27 13:06:56 +00:00 · 2026-03-26 20:18:13 -07:00 · 2026-03-26 13:15:22 -05:00 · 2026-03-26 13:02:01 -05:00 · 2026-03-26 12:59:18 -05:00 · 2026-03-26 12:57:25 -05:00
231 changed files with 10178 additions and 3413 deletions
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -2,7 +2,9 @@
  "name": "pocket-id",
  "image": "mcr.microsoft.com/devcontainers/typescript-node:1-22-bookworm",
  "features": {
-    "ghcr.io/devcontainers/features/go:1": {}
+    "ghcr.io/devcontainers/features/go:1": {
+      "version": "1.26"
+    }
  },
  "customizations": {
    "vscode": {
--- a/.github/workflows/backend-linter.yml
+++ b/.github/workflows/backend-linter.yml
@@ -32,9 +32,9 @@ jobs:
          go-version-file: backend/go.mod

      - name: Run Golangci-lint
-        uses: golangci/golangci-lint-action@v8.0.0
+        uses: golangci/golangci-lint-action@v9.0.0
        with:
-          version: v2.4.0
+          version: v2.9.0
          args: --build-tags=exclude_frontend
          working-directory: backend
          only-new-issues: ${{ github.event_name == 'pull_request' }}
--- a/.github/workflows/build-next.yml
+++ b/.github/workflows/build-next.yml
@@ -27,7 +27,7 @@ jobs:
      - name: Setup Node.js
        uses: actions/setup-node@v5
        with:
-          node-version: 22
+          node-version: 24

      - name: Setup Go
        uses: actions/setup-go@v6
--- a/.github/workflows/e2e-tests.yml
+++ b/.github/workflows/e2e-tests.yml
@@ -78,7 +78,7 @@ jobs:
      - name: Setup Node.js
        uses: actions/setup-node@v5
        with:
-          node-version: 22
+          node-version: 24

      - name: Cache Playwright Browsers
        uses: actions/cache@v4
--- a/.github/workflows/pr-quality.yml
+++ b/.github/workflows/pr-quality.yml
@@ -0,0 +1,106 @@
+name: PR Quality
+
+permissions:
+    contents: read
+    issues: read
+    pull-requests: write
+
+on:
+    pull_request_target:
+        types: [opened, reopened]
+
+jobs:
+    pr-quality:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: peakoss/anti-slop@v0
+              with:
+                  # General Settings
+                  max-failures: 4
+
+                  # PR Branch Checks
+                  allowed-target-branches: "main"
+                  blocked-target-branches: ""
+                  allowed-source-branches: ""
+                  blocked-source-branches: ""
+
+                  # PR Quality Checks
+                  max-negative-reactions: 0
+                  require-maintainer-can-modify: true
+
+                  # PR Title Checks
+                  require-conventional-title: true
+
+                  # PR Description Checks
+                  require-description: true
+                  max-description-length: 2500
+                  max-emoji-count: 0
+                  max-code-references: 0
+                  require-linked-issue: false
+                  blocked-terms: ""
+                  blocked-issue-numbers: ""
+
+                  # PR Template Checks
+                  require-pr-template: true
+                  strict-pr-template-sections: ""
+                  optional-pr-template-sections: "Issues"
+                  max-additional-pr-template-sections: 3
+
+                  # Commit Message Checks
+                  max-commit-message-length: 500
+                  require-conventional-commits: false
+                  require-commit-author-match: true
+                  blocked-commit-authors: ""
+
+                  # File Checks
+                  allowed-file-extensions: ""
+                  allowed-paths: ""
+                  blocked-paths: |
+                      SECURITY.md
+                      LICENSE
+                  require-final-newline: false
+                  max-added-comments: 0
+
+                  # User Checks
+                  detect-spam-usernames: true
+                  min-account-age: 30
+                  max-daily-forks: 7
+                  min-profile-completeness: 4
+
+                  # Merge Checks
+                  min-repo-merged-prs: 0
+                  min-repo-merge-ratio: 0
+                  min-global-merge-ratio: 30
+                  global-merge-ratio-exclude-own: false
+
+                  # Exemptions
+                  exempt-draft-prs: false
+                  exempt-bots: |
+                      actions-user
+                      dependabot[bot]
+                      renovate[bot]
+                      github-actions[bot]
+                  exempt-users: ""
+                  exempt-author-association: "OWNER,MEMBER,COLLABORATOR"
+                  exempt-label: "quality/exempt"
+                  exempt-pr-label: ""
+                  exempt-all-milestones: false
+                  exempt-all-pr-milestones: false
+                  exempt-milestones: ""
+                  exempt-pr-milestones: ""
+
+                  # PR Success Actions
+                  success-add-pr-labels: "quality/verified"
+
+                  # PR Failure Actions
+                  failure-remove-pr-labels: ""
+                  failure-remove-all-pr-labels: true
+                  failure-add-pr-labels: "quality/rejected"
+                  failure-pr-message: |
+                      This PR did not pass quality checks so it will be closed.
+                      See the [workflow run](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}/attempts/${{ github.run_attempt }}) for details on which checks failed.
+
+                      If you believe this is a mistake please let us know.
+
+                  close-pr: true
+                  lock-pr: false
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,7 +21,7 @@ jobs:
      - name: Setup Node.js
        uses: actions/setup-node@v5
        with:
-          node-version: 22
+          node-version: 24
      - uses: actions/setup-go@v6
        with:
          go-version-file: "backend/go.mod"
--- a/.github/workflows/svelte-check.yml
+++ b/.github/workflows/svelte-check.yml
@@ -42,7 +42,7 @@ jobs:
      - name: Setup Node.js
        uses: actions/setup-node@v5
        with:
-          node-version: 22
+          node-version: 24

      - name: Install dependencies
        run: pnpm --filter pocket-id-frontend install --frozen-lockfile
--- a/.version
+++ b/.version
@@ -1 +1 @@
-2.0.1
+2.5.0
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,162 @@
+## v2.5.0
+
+### Bug Fixes
+
+- better error messages when there's another instance of Pocket ID running ([#1370](https://github.com/pocket-id/pocket-id/pull/1370) by @ItalyPaleAle)
+- move tooltip inside of form input to prevent shifting ([#1369](https://github.com/pocket-id/pocket-id/pull/1369) by @GameTec-live)
+- derive LDAP admin access from group membership ([#1374](https://github.com/pocket-id/pocket-id/pull/1374) by @kmendell)
+- avoid fmt.Sprintf on custom GeoLiteDBUrl without %s placeholder ([#1384](https://github.com/pocket-id/pocket-id/pull/1384) by @choyri)
+- show a warning when SQLite DB is stored on NFS/SMB/FUSE ([#1381](https://github.com/pocket-id/pocket-id/pull/1381) by @ItalyPaleAle)
+- empty background restore after reboot ([#1379](https://github.com/pocket-id/pocket-id/pull/1379) by @taoso)
+- allow one-char username on signup ([#1378](https://github.com/pocket-id/pocket-id/pull/1378) by @taoso)
+
+### Features
+
+- allow use of svg, png, and ico images types for favicon ([#1289](https://github.com/pocket-id/pocket-id/pull/1289) by @taoso)
+- allow clearing background image ([#1290](https://github.com/pocket-id/pocket-id/pull/1290) by @taoso)
+- add `token_endpoint_auth_methods_supported` to `.well-known` ([#1388](https://github.com/pocket-id/pocket-id/pull/1388) by @owenvoke)
+- add TRUSTED_PLATFORM environment variable for gin ([#1372](https://github.com/pocket-id/pocket-id/pull/1372) by @choyri)
+
+### Other
+
+- add pr quality action ([e3905cf](https://github.com/pocket-id/pocket-id/commit/e3905cf3159fe0370778b0d7d3be64b4246d19be) by @stonith404)
+- separate querying LDAP and updating DB during sync ([#1371](https://github.com/pocket-id/pocket-id/pull/1371) by @ItalyPaleAle)
+- bump google.golang.org/grpc from 1.79.1 to 1.79.3 in /backend in the go_modules group across 1 directory ([#1391](https://github.com/pocket-id/pocket-id/pull/1391) by @dependabot[bot])
+- Improve Latvian translations in lv.json ([#1382](https://github.com/pocket-id/pocket-id/pull/1382) by @Raito00)
+- ignore linter on app image bootstrap ([5251cd9](https://github.com/pocket-id/pocket-id/commit/5251cd97994177c96cb6f9ab3f88ca31367b5b55) by @kmendell)
+- upgrade dependencies ([e7e0176](https://github.com/pocket-id/pocket-id/commit/e7e0176316857186b9683e2f0cb0686189f86cfb) by @kmendell)
+- upgrade dependencies ([3c42a71](https://github.com/pocket-id/pocket-id/commit/3c42a713ce91b4061ffcf86d92cbb19294359ff8) by @kmendell)
+
+**Full Changelog**: https://github.com/pocket-id/pocket-id/compare/v2.4.0...v2.5.0
+
+## v2.4.0
+
+### Bug Fixes
+
+- improve wildcard matching by using `go-urlpattern` ([#1332](https://github.com/pocket-id/pocket-id/pull/1332) by @stonith404)
+- federated client credentials not working if sub ≠ client_id ([#1342](https://github.com/pocket-id/pocket-id/pull/1342) by @ItalyPaleAle)
+- handle IPv6 addresses in callback URLs ([#1355](https://github.com/pocket-id/pocket-id/pull/1355) by @ItalyPaleAle)
+- wildcard callback URLs blocked by browser-native URL validation ([#1359](https://github.com/pocket-id/pocket-id/pull/1359) by @Copilot)
+- one-time-access-token route should get user ID from URL only ([#1358](https://github.com/pocket-id/pocket-id/pull/1358) by @ItalyPaleAle)
+- various fixes in background jobs ([#1362](https://github.com/pocket-id/pocket-id/pull/1362) by @ItalyPaleAle)
+- use URL keyboard type for callback URL inputs ([a675d07](https://github.com/pocket-id/pocket-id/commit/a675d075d1ab9b7ff8160f1cfc35bc0ea1f1980a) by @stonith404)
+
+### Features
+
+- allow first name and display name to be optional ([#1288](https://github.com/pocket-id/pocket-id/pull/1288) by @taoso)
+
+### Other
+
+- bump svelte from 5.53.2 to 5.53.5 in the npm_and_yarn group across 1 directory ([#1348](https://github.com/pocket-id/pocket-id/pull/1348) by @dependabot[bot])
+- bump @sveltejs/kit from 2.53.0 to 2.53.3 in the npm_and_yarn group across 1 directory ([#1349](https://github.com/pocket-id/pocket-id/pull/1349) by @dependabot[bot])
+- update AAGUIDs ([#1354](https://github.com/pocket-id/pocket-id/pull/1354) by @github-actions[bot])
+- add Português files ([01141b8](https://github.com/pocket-id/pocket-id/commit/01141b8c0f2e96a40fd876d3206e49a694fd12c4) by @kmendell)
+- add Latvian files ([e0fc4cc](https://github.com/pocket-id/pocket-id/commit/e0fc4cc01bd51e5a97e46aad78a493a668049220) by @kmendell)
+- fix wrong seed data ([e7bd66d](https://github.com/pocket-id/pocket-id/commit/e7bd66d1a77c89dde542b4385ba01dc0d432e434) by @stonith404)
+- fix wrong seed data in `database.json` ([f4eb8db](https://github.com/pocket-id/pocket-id/commit/f4eb8db50993edacd90e919b39a5c6d9dd4924c7) by @stonith404)
+
+### Performance Improvements
+
+- frontend performance optimizations ([#1344](https://github.com/pocket-id/pocket-id/pull/1344) by @ItalyPaleAle)
+
+**Full Changelog**: https://github.com/pocket-id/pocket-id/compare/v2.3.0...v2.4.0
+
+## v2.3.0
+
+### Bug Fixes
+
+- ENCRYPTION_KEY needed for version and help commands ([#1256](https://github.com/pocket-id/pocket-id/pull/1256) by @kmendell)
+- prevent deletion of OIDC provider logo for non admin/anonymous users ([#1267](https://github.com/pocket-id/pocket-id/pull/1267) by @HiMoritz)
+- add `type="url"` to url inputs ([bb7b0d5](https://github.com/pocket-id/pocket-id/commit/bb7b0d56084df49b6a003cc3eaf076884e2cbf60) by @stonith404)
+- increase rate limit for frontend and api requests ([aab7e36](https://github.com/pocket-id/pocket-id/commit/aab7e364e85f1ce13950da93cc50324328cdd96d) by @stonith404)
+- decode URL-encoded client ID and secret in Basic auth ([#1263](https://github.com/pocket-id/pocket-id/pull/1263) by @ypomortsev)
+- token endpoint must not accept params as query string args ([#1321](https://github.com/pocket-id/pocket-id/pull/1321) by @ItalyPaleAle)
+- left align input error messages ([b3fe143](https://github.com/pocket-id/pocket-id/commit/b3fe14313684f9d8c389ed93ea8e479e3681b5c6) by @stonith404)
+- disallow API key renewal and creation with API key authentication ([#1334](https://github.com/pocket-id/pocket-id/pull/1334) by @stonith404)
+
+### Features
+
+- add VERSION_CHECK_DISABLED environment variable ([#1254](https://github.com/pocket-id/pocket-id/pull/1254) by @dihmandrake)
+- add support for HTTP/2 ([56afebc](https://github.com/pocket-id/pocket-id/commit/56afebc242be7ed14b58185425d6445bf18f640a) by @stonith404)
+- manageability of uncompressed geolite db file ([#1234](https://github.com/pocket-id/pocket-id/pull/1234) by @gucheen)
+- add JWT ID for generated tokens ([#1322](https://github.com/pocket-id/pocket-id/pull/1322) by @imnotjames)
+- current version api endpoint ([#1310](https://github.com/pocket-id/pocket-id/pull/1310) by @kmendell)
+
+### Other
+
+- bump @sveltejs/kit from 2.49.2 to 2.49.5 in the npm_and_yarn group across 1 directory ([#1240](https://github.com/pocket-id/pocket-id/pull/1240) by @dependabot[bot])
+- bump svelte from 5.46.1 to 5.46.4 in the npm_and_yarn group across 1 directory ([#1242](https://github.com/pocket-id/pocket-id/pull/1242) by @dependabot[bot])
+- bump devalue to 5.6.2 ([9dbc02e](https://github.com/pocket-id/pocket-id/commit/9dbc02e56871b2de6a39c443e1455efc26a949f7) by @kmendell)
+- upgrade deps ([4811625](https://github.com/pocket-id/pocket-id/commit/4811625cdd64b47ea67b7a9b03396e455896ccd6) by @kmendell)
+- add Estonian files ([53ef61a](https://github.com/pocket-id/pocket-id/commit/53ef61a3e5c4b77edec49d41ab94302bfec84269) by @kmendell)
+- update AAGUIDs ([#1257](https://github.com/pocket-id/pocket-id/pull/1257) by @github-actions[bot])
+- add Norwegian language files ([80558c5](https://github.com/pocket-id/pocket-id/commit/80558c562533e7b4d658d5baa4221d8cd209b47d) by @stonith404)
+- run formatter ([60825c5](https://github.com/pocket-id/pocket-id/commit/60825c5743b0e233ab622fd4d0ea04eb7ab59529) by @kmendell)
+- bump axios from 1.13.2 to 1.13.5 in the npm_and_yarn group across 1 directory ([#1309](https://github.com/pocket-id/pocket-id/pull/1309) by @dependabot[bot])
+- update dependenicies ([94a4897](https://github.com/pocket-id/pocket-id/commit/94a48977ba24e099b6221838d620c365eb1d4bf4) by @kmendell)
+- update AAGUIDs ([#1316](https://github.com/pocket-id/pocket-id/pull/1316) by @github-actions[bot])
+- bump svelte from 5.46.4 to 5.51.5 in the npm_and_yarn group across 1 directory ([#1324](https://github.com/pocket-id/pocket-id/pull/1324) by @dependabot[bot])
+- bump @sveltejs/kit from 2.49.5 to 2.52.2 in the npm_and_yarn group across 1 directory ([#1327](https://github.com/pocket-id/pocket-id/pull/1327) by @dependabot[bot])
+- upgrade dependencies ([0678699](https://github.com/pocket-id/pocket-id/commit/0678699d0cce5448c425b2c16bedab5fc242cbf0) by @stonith404)
+- upgrade to node 24 and go 1.26.0 ([#1328](https://github.com/pocket-id/pocket-id/pull/1328) by @kmendell)
+
+**Full Changelog**: https://github.com/pocket-id/pocket-id/compare/v2.2.0...v2.3.0
+
+## v2.2.0
+
+### Bug Fixes
+
+- allow changing "require email address" if no SMTP credentials present ([8c68b08](https://github.com/pocket-id/pocket-id/commit/8c68b08c12ba371deda61662e3d048d63d07c56f) by @stonith404)
+- data import from sqlite to postgres fails because of wrong datatype ([1a032a8](https://github.com/pocket-id/pocket-id/commit/1a032a812ef78b250a898d14bec73a8ef7a7859a) by @stonith404)
+- user can't update account if email is empty ([5828fa5](https://github.com/pocket-id/pocket-id/commit/5828fa57791314594625d52475733dce23cc2fcc) by @stonith404)
+- login codes sent by an admin incorrectly requires a device token ([03f9be0](https://github.com/pocket-id/pocket-id/commit/03f9be0d125732e02a8e2c5390d9e6d0c74ce957) by @stonith404)
+- allow exchanging logic code if already authenticated ([0e2cdc3](https://github.com/pocket-id/pocket-id/commit/0e2cdc393e34276bb3b8ea318cdc7261de3f2dec) by @stonith404)
+- db version downgrades don't downgrade db schema ([4df4bcb](https://github.com/pocket-id/pocket-id/commit/4df4bcb6451b4bf88093e04f3222c8737f2c7be3) by @stonith404)
+- use user specific email verified claim instead of global one ([2a11c3e](https://github.com/pocket-id/pocket-id/commit/2a11c3e60942d45c2e5b422d99945bce65a622a2) by @stonith404)
+
+### Features
+
+- add CLI command for encryption key rotation ([#1209](https://github.com/pocket-id/pocket-id/pull/1209) by @stonith404)
+- improve passkey error messages ([2f25861](https://github.com/pocket-id/pocket-id/commit/2f25861d15aefa868042e70d3e21b7b38a6ae679) by @stonith404)
+- make home page URL configurable ([#1215](https://github.com/pocket-id/pocket-id/pull/1215) by @stonith404)
+- add option to renew API key ([#1214](https://github.com/pocket-id/pocket-id/pull/1214) by @stonith404)
+- add support for email verification ([#1223](https://github.com/pocket-id/pocket-id/pull/1223) by @stonith404)
+- add environment variable to disable built-in rate limiting ([9ca3d33](https://github.com/pocket-id/pocket-id/commit/9ca3d33c8897cf49a871783058205bb180529cd2) by @stonith404)
+- add static api key env variable ([#1229](https://github.com/pocket-id/pocket-id/pull/1229) by @stonith404)
+
+**Full Changelog**: https://github.com/pocket-id/pocket-id/compare/v2.1.0...v2.2.0
+
+## v2.1.0
+
+### Bug Fixes
+
+- invalid cookie name for email login code device token ([d6a7b50](https://github.com/pocket-id/pocket-id/commit/d6a7b503ff4571b1291a55a569add3374f5e2d5b) by @stonith404)
+
+### Features
+
+- add issuer url to oidc client details list ([#1197](https://github.com/pocket-id/pocket-id/pull/1197) by @kmendell)
+- process nonce within device authorization flow ([#1185](https://github.com/pocket-id/pocket-id/pull/1185) by @justincmoy)
+
+### Other
+
+- run SCIM jobs in context of gocron instead of custom implementation ([4881130](https://github.com/pocket-id/pocket-id/commit/4881130eadcef0642f8a87650b7c36fda453b51b) by @stonith404)
+
+**Full Changelog**: https://github.com/pocket-id/pocket-id/compare/v2.0.2...v2.1.0
+
+## v2.0.2
+
+### Bug Fixes
+
+- migration fails if users exist with no email address ([2f651ad](https://github.com/pocket-id/pocket-id/commit/2f651adf3b4e8d689461da2083c3afcb1eb1d477) by @stonith404)
+- allow version downgrade database is dirty ([ba00f40](https://github.com/pocket-id/pocket-id/commit/ba00f40bd4b06f31d251599fcb1db63e902a6987) by @stonith404)
+- localhost callback URLs with port don't match correctly ([7c34501](https://github.com/pocket-id/pocket-id/commit/7c345010556f11a593948b2a1ae558b7a8003696) by @stonith404)
+
+### Other
+
+- add no-op migration to postgres ([a24b2af](https://github.com/pocket-id/pocket-id/commit/a24b2afb7b8165bed05976058a8ae797adc245df) by @stonith404)
+
+**Full Changelog**: https://github.com/pocket-id/pocket-id/compare/v2.0.1...v2.0.2
+
 ## v2.0.1

 ### Bug Fixes
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -21,7 +21,6 @@ Before you submit the pull request for review please ensure that
  ```

  Where `TYPE` can be:
-
  - **feat** - is a new feature
  - **doc** - documentation only changes
  - **fix** - a bug fix
@@ -51,8 +50,8 @@ If you use [Dev Containers](https://code.visualstudio.com/docs/remote/containers

 If you don't use Dev Containers, you need to install the following tools manually:

- [Node.js](https://nodejs.org/en/download/) >= 22
- [Go](https://golang.org/doc/install) >= 1.25
+- [Node.js](https://nodejs.org/en/download/) >= 24
+- [Go](https://golang.org/doc/install) >= 1.26
 - [Git](https://git-scm.com/downloads)

 ### 2. Setup
--- a/backend/frontend/frontend_excluded.go
+++ b/backend/frontend/frontend_excluded.go
@@ -4,6 +4,6 @@ package frontend

 import "github.com/gin-gonic/gin"

-func RegisterFrontend(router *gin.Engine) error {
+func RegisterFrontend(router *gin.Engine, rateLimitMiddleware gin.HandlerFunc) error {
 	return ErrFrontendNotIncluded
 }
--- a/backend/frontend/frontend_included.go
+++ b/backend/frontend/frontend_included.go
@@ -8,8 +8,10 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
+	"mime"
 	"net/http"
 	"os"
+	"path"
 	"strings"
 	"time"

@@ -52,16 +54,23 @@ func init() {
 	}
 }

-func RegisterFrontend(router *gin.Engine) error {
+func RegisterFrontend(router *gin.Engine, rateLimitMiddleware gin.HandlerFunc) error {
 	distFS, err := fs.Sub(frontendFS, "dist")
 	if err != nil {
 		return fmt.Errorf("failed to create sub FS: %w", err)
 	}

-	cacheMaxAge := time.Hour * 24
-	fileServer := NewFileServerWithCaching(http.FS(distFS), int(cacheMaxAge.Seconds()))
+	// Load a map of all files to see which ones are available pre-compressed
+	preCompressed, err := listPreCompressedAssets(distFS)
+	if err != nil {
+		return fmt.Errorf("failed to index pre-compressed frontend assets: %w", err)
+	}

-	router.NoRoute(func(c *gin.Context) {
+	// Init the file server
+	fileServer := NewFileServerWithCaching(http.FS(distFS), preCompressed)
+
+	// Handler for Gin
+	handler := func(c *gin.Context) {
 		path := strings.TrimPrefix(c.Request.URL.Path, "/")

 		if strings.HasSuffix(path, "/") {
@@ -97,7 +106,9 @@ func RegisterFrontend(router *gin.Engine) error {
 		// Serve other static assets with caching
 		c.Request.URL.Path = "/" + path
 		fileServer.ServeHTTP(c.Writer, c.Request)
-	})
+	}
+
+	router.NoRoute(rateLimitMiddleware, handler)

 	return nil
 }
@@ -106,34 +117,138 @@ func RegisterFrontend(router *gin.Engine) error {
 type FileServerWithCaching struct {
 	root                    http.FileSystem
 	lastModified            time.Time
-	cacheMaxAge             int
 	lastModifiedHeaderValue string
-	cacheControlHeaderValue string
+	preCompressed           preCompressedMap
 }

-func NewFileServerWithCaching(root http.FileSystem, maxAge int) *FileServerWithCaching {
+func NewFileServerWithCaching(root http.FileSystem, preCompressed preCompressedMap) *FileServerWithCaching {
 	return &FileServerWithCaching{
 		root:                    root,
 		lastModified:            time.Now(),
-		cacheMaxAge:             maxAge,
 		lastModifiedHeaderValue: time.Now().UTC().Format(http.TimeFormat),
-		cacheControlHeaderValue: fmt.Sprintf("public, max-age=%d", maxAge),
+		preCompressed:           preCompressed,
 	}
 }

 func (f *FileServerWithCaching) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	// Check if the client has a cached version
-	if ifModifiedSince := r.Header.Get("If-Modified-Since"); ifModifiedSince != "" {
-		ifModifiedSinceTime, err := time.Parse(http.TimeFormat, ifModifiedSince)
-		if err == nil && f.lastModified.Before(ifModifiedSinceTime.Add(1*time.Second)) {
-			// Client's cached version is up to date
-			w.WriteHeader(http.StatusNotModified)
-			return
+	// First, set cache headers
+	// Check if the request is for an immutable asset
+	if isImmutableAsset(r) {
+		// Set the cache control header as immutable with a long expiration
+		w.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
+	} else {
+		// Check if the client has a cached version
+		ifModifiedSince := r.Header.Get("If-Modified-Since")
+		if ifModifiedSince != "" {
+			ifModifiedSinceTime, err := time.Parse(http.TimeFormat, ifModifiedSince)
+			if err == nil && f.lastModified.Before(ifModifiedSinceTime.Add(1*time.Second)) {
+				// Client's cached version is up to date
+				w.WriteHeader(http.StatusNotModified)
+				return
+			}
+		}
+
+		// Cache other assets for up to 24 hours, but set Last-Modified too
+		w.Header().Set("Last-Modified", f.lastModifiedHeaderValue)
+		w.Header().Set("Cache-Control", "public, max-age=86400")
+	}
+
+	// Check if the asset is available pre-compressed
+	_, ok := f.preCompressed[r.URL.Path]
+	if ok {
+		// Add a "Vary" with "Accept-Encoding" so CDNs are aware that content is pre-compressed
+		w.Header().Add("Vary", "Accept-Encoding")
+
+		// Select the encoding if any
+		ext, ce := f.selectEncoding(r)
+		if ext != "" {
+			// Set the content type explicitly before changing the path
+			ct := mime.TypeByExtension(path.Ext(r.URL.Path))
+			if ct != "" {
+				w.Header().Set("Content-Type", ct)
+			}
+
+			// Make the serve return the encoded content
+			w.Header().Set("Content-Encoding", ce)
+			r.URL.Path += "." + ext
 		}
 	}

-	w.Header().Set("Last-Modified", f.lastModifiedHeaderValue)
-	w.Header().Set("Cache-Control", f.cacheControlHeaderValue)
-
 	http.FileServer(f.root).ServeHTTP(w, r)
 }
+
+func (f *FileServerWithCaching) selectEncoding(r *http.Request) (ext string, contentEnc string) {
+	available, ok := f.preCompressed[r.URL.Path]
+	if !ok {
+		return "", ""
+	}
+
+	// Check if the client accepts compressed files
+	acceptEncoding := strings.TrimSpace(strings.ToLower(r.Header.Get("Accept-Encoding")))
+	if acceptEncoding == "" {
+		return "", ""
+	}
+
+	// Prefer brotli over gzip when both are accepted.
+	if available.br && (acceptEncoding == "*" || acceptEncoding == "br" || strings.Contains(acceptEncoding, "br")) {
+		return "br", "br"
+	}
+	if available.gz && (acceptEncoding == "gzip" || strings.Contains(acceptEncoding, "gzip")) {
+		return "gz", "gzip"
+	}
+
+	return "", ""
+}
+
+func isImmutableAsset(r *http.Request) bool {
+	switch {
+	// Fonts
+	case strings.HasPrefix(r.URL.Path, "/fonts/"):
+		return true
+
+	// Compiled SvelteKit assets
+	case strings.HasPrefix(r.URL.Path, "/_app/immutable/"):
+		return true
+
+	default:
+		return false
+	}
+}
+
+type preCompressedMap map[string]struct {
+	br bool
+	gz bool
+}
+
+func listPreCompressedAssets(distFS fs.FS) (preCompressedMap, error) {
+	preCompressed := make(preCompressedMap, 0)
+	err := fs.WalkDir(distFS, ".", func(path string, d fs.DirEntry, walkErr error) error {
+		if walkErr != nil {
+			return walkErr
+		}
+
+		if d.IsDir() {
+			return nil
+		}
+
+		switch {
+		case strings.HasSuffix(path, ".br"):
+			originalPath := "/" + strings.TrimSuffix(path, ".br")
+			entry := preCompressed[originalPath]
+			entry.br = true
+			preCompressed[originalPath] = entry
+		case strings.HasSuffix(path, ".gz"):
+			originalPath := "/" + strings.TrimSuffix(path, ".gz")
+			entry := preCompressed[originalPath]
+			entry.gz = true
+			preCompressed[originalPath] = entry
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return preCompressed, nil
+}
--- a/backend/go.mod
+++ b/backend/go.mod
@@ -1,24 +1,25 @@
 module github.com/pocket-id/pocket-id/backend

-go 1.25
+go 1.26.0

 require (
-	github.com/aws/aws-sdk-go-v2 v1.41.0
-	github.com/aws/aws-sdk-go-v2/config v1.32.6
-	github.com/aws/aws-sdk-go-v2/credentials v1.19.6
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.95.0
-	github.com/aws/smithy-go v1.24.0
+	github.com/aws/aws-sdk-go-v2 v1.41.1
+	github.com/aws/aws-sdk-go-v2/config v1.32.9
+	github.com/aws/aws-sdk-go-v2/credentials v1.19.9
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.96.0
+	github.com/aws/smithy-go v1.24.1
 	github.com/caarlos0/env/v11 v11.3.1
 	github.com/cenkalti/backoff/v5 v5.0.3
 	github.com/disintegration/imageorient v0.0.0-20180920195336-8147d86e83ec
 	github.com/disintegration/imaging v1.6.2
+	github.com/dunglas/go-urlpattern v0.0.0-20241020164140-716dfa1c80b1
 	github.com/emersion/go-sasl v0.0.0-20241020182733-b788ff22d5a6
 	github.com/emersion/go-smtp v0.24.0
 	github.com/gin-contrib/slog v1.2.0
 	github.com/gin-gonic/gin v1.11.0
 	github.com/glebarez/go-sqlite v1.22.0
 	github.com/glebarez/sqlite v1.11.0
-	github.com/go-co-op/gocron/v2 v2.19.0
+	github.com/go-co-op/gocron/v2 v2.19.1
 	github.com/go-ldap/ldap/v3 v3.4.12
 	github.com/go-playground/validator/v10 v10.30.1
 	github.com/go-webauthn/webauthn v0.15.0
@@ -27,30 +28,31 @@ require (
 	github.com/hashicorp/go-uuid v1.0.3
 	github.com/jinzhu/copier v0.4.0
 	github.com/joho/godotenv v1.5.1
-	github.com/lestrrat-go/httprc/v3 v3.0.3
-	github.com/lestrrat-go/jwx/v3 v3.0.12
-	github.com/lmittmann/tint v1.1.2
+	github.com/lestrrat-go/httprc/v3 v3.0.4
+	github.com/lestrrat-go/jwx/v3 v3.0.13
+	github.com/lmittmann/tint v1.1.3
 	github.com/mattn/go-isatty v0.0.20
 	github.com/mileusna/useragent v1.3.5
 	github.com/orandin/slog-gorm v1.4.0
 	github.com/oschwald/maxminddb-golang/v2 v2.1.1
 	github.com/spf13/cobra v1.10.2
 	github.com/stretchr/testify v1.11.1
-	go.opentelemetry.io/contrib/bridges/otelslog v0.14.0
-	go.opentelemetry.io/contrib/exporters/autoexport v0.64.0
-	go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.64.0
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.64.0
-	go.opentelemetry.io/otel v1.39.0
-	go.opentelemetry.io/otel/log v0.15.0
-	go.opentelemetry.io/otel/metric v1.39.0
-	go.opentelemetry.io/otel/sdk v1.39.0
-	go.opentelemetry.io/otel/sdk/log v0.15.0
-	go.opentelemetry.io/otel/sdk/metric v1.39.0
-	go.opentelemetry.io/otel/trace v1.39.0
-	golang.org/x/crypto v0.46.0
-	golang.org/x/image v0.34.0
+	go.opentelemetry.io/contrib/bridges/otelslog v0.15.0
+	go.opentelemetry.io/contrib/exporters/autoexport v0.65.0
+	go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.65.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.65.0
+	go.opentelemetry.io/otel v1.40.0
+	go.opentelemetry.io/otel/log v0.16.0
+	go.opentelemetry.io/otel/metric v1.40.0
+	go.opentelemetry.io/otel/sdk v1.40.0
+	go.opentelemetry.io/otel/sdk/log v0.16.0
+	go.opentelemetry.io/otel/sdk/metric v1.40.0
+	go.opentelemetry.io/otel/trace v1.40.0
+	golang.org/x/crypto v0.48.0
+	golang.org/x/image v0.36.0
+	golang.org/x/net v0.50.0
 	golang.org/x/sync v0.19.0
-	golang.org/x/text v0.32.0
+	golang.org/x/text v0.34.0
 	golang.org/x/time v0.14.0
 	gorm.io/driver/postgres v1.6.0
 	gorm.io/gorm v1.31.1
@@ -59,23 +61,24 @@ require (
 require (
 	github.com/Azure/go-ntlmssp v0.1.0 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.4 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.16 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.16 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.16 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.17 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.17 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.17 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.4 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.16 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.17 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.4 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.7 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.16 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.16 // indirect
-	github.com/aws/aws-sdk-go-v2/service/signin v1.0.4 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.30.8 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.12 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.41.5 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.8 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.17 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.17 // indirect
+	github.com/aws/aws-sdk-go-v2/service/signin v1.0.5 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.30.10 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.14 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.41.6 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/bits-and-blooms/bitset v1.14.3 // indirect
 	github.com/bytedance/gopkg v0.1.3 // indirect
-	github.com/bytedance/sonic v1.14.2 // indirect
-	github.com/bytedance/sonic/loader v0.4.0 // indirect
+	github.com/bytedance/sonic v1.15.0 // indirect
+	github.com/bytedance/sonic/loader v0.5.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.6 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
@@ -84,22 +87,22 @@ require (
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.12 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.13 // indirect
 	github.com/gin-contrib/sse v1.1.0 // indirect
 	github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
-	github.com/go-webauthn/x v0.1.27 // indirect
+	github.com/go-viper/mapstructure/v2 v2.5.0 // indirect
+	github.com/go-webauthn/x v0.2.1 // indirect
 	github.com/goccy/go-json v0.10.5 // indirect
-	github.com/goccy/go-yaml v1.19.1 // indirect
-	github.com/golang-jwt/jwt/v5 v5.3.0 // indirect
+	github.com/goccy/go-yaml v1.19.2 // indirect
+	github.com/golang-jwt/jwt/v5 v5.3.1 // indirect
 	github.com/google/go-github/v39 v39.2.0 // indirect
 	github.com/google/go-querystring v1.2.0 // indirect
 	github.com/google/go-tpm v0.9.8 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.4 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
@@ -116,56 +119,56 @@ require (
 	github.com/lestrrat-go/dsig-secp256k1 v1.0.0 // indirect
 	github.com/lestrrat-go/httpcc v1.0.1 // indirect
 	github.com/lestrrat-go/option/v2 v2.0.0 // indirect
-	github.com/lib/pq v1.10.9 // indirect
-	github.com/mattn/go-sqlite3 v1.14.33 // indirect
+	github.com/lib/pq v1.11.2 // indirect
+	github.com/mattn/go-sqlite3 v1.14.34 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/nlnwa/whatwg-url v0.5.0 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/prometheus/client_golang v1.23.2 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/common v0.67.4 // indirect
+	github.com/prometheus/common v0.67.5 // indirect
 	github.com/prometheus/otlptranslator v1.0.0 // indirect
 	github.com/prometheus/procfs v0.19.2 // indirect
 	github.com/quic-go/qpack v0.6.0 // indirect
-	github.com/quic-go/quic-go v0.58.0 // indirect
+	github.com/quic-go/quic-go v0.59.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/robfig/cron/v3 v3.0.1 // indirect
 	github.com/segmentio/asm v1.2.1 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.3.1 // indirect
-	github.com/valyala/fastjson v1.6.7 // indirect
+	github.com/valyala/fastjson v1.6.10 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
-	go.opentelemetry.io/contrib/bridges/prometheus v0.64.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.15.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.15.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/prometheus v0.61.0 // indirect
-	go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.15.0 // indirect
-	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.39.0 // indirect
-	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.39.0 // indirect
+	go.opentelemetry.io/contrib/bridges/prometheus v0.65.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/prometheus v0.62.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.40.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.9.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.3 // indirect
-	golang.org/x/arch v0.23.0 // indirect
-	golang.org/x/exp v0.0.0-20251219203646-944ab1f22d93 // indirect
-	golang.org/x/net v0.48.0 // indirect
-	golang.org/x/oauth2 v0.34.0 // indirect
-	golang.org/x/sys v0.39.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20251222181119-0a764e51fe1b // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
-	google.golang.org/grpc v1.78.0 // indirect
+	golang.org/x/arch v0.24.0 // indirect
+	golang.org/x/exp v0.0.0-20260218203240-3dfff04db8fa // indirect
+	golang.org/x/oauth2 v0.35.0 // indirect
+	golang.org/x/sys v0.41.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260217215200-42d3e9bedb6d // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
+	google.golang.org/grpc v1.79.3 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	modernc.org/libc v1.67.4 // indirect
+	modernc.org/libc v1.68.0 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
 	modernc.org/memory v1.11.0 // indirect
-	modernc.org/sqlite v1.42.2 // indirect
+	modernc.org/sqlite v1.46.1 // indirect
 )
--- a/backend/go.sum
+++ b/backend/go.sum
@@ -6,52 +6,55 @@ github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERo
 github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
 github.com/alexbrainman/sspi v0.0.0-20250919150558-7d374ff0d59e h1:4dAU9FXIyQktpoUAgOJK3OTFc/xug0PCXYCqU0FgDKI=
 github.com/alexbrainman/sspi v0.0.0-20250919150558-7d374ff0d59e/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
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@@ -166,8 +171,8 @@ github.com/google/pprof v0.0.0-20250317173921-a4b03ec1a45e h1:ijClszYn+mADRFY17k
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@@ -226,20 +231,20 @@ github.com/lestrrat-go/dsig-secp256k1 v1.0.0 h1:JpDe4Aybfl0soBvoVwjqDbp+9S1Y2OM7
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@@ -257,6 +262,8 @@ github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq
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@@ -276,16 +283,16 @@ github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h
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@@ -316,62 +323,63 @@ github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS
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-golang.org/x/oauth2 v0.34.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA=
+golang.org/x/oauth2 v0.35.0 h1:Mv2mzuHuZuY2+bkyWXIHMfhNdJAdwW3FuWeCPYN5GVQ=
+golang.org/x/oauth2 v0.35.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
 golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=
-golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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+golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
+golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
+golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
+golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
-golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
+golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
 golang.org/x/time v0.14.0 h1:MRx4UaLrDotUKUdCIqzPC48t1Y9hANFKIRpNx+Te8PI=
 golang.org/x/time v0.14.0/go.mod h1:eL/Oa2bBBK0TkX57Fyni+NgnyQQN4LitPmob2Hjnqw4=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.40.0 h1:yLkxfA+Qnul4cs9QA3KnlFu0lVmd8JJfoq+E41uSutA=
-golang.org/x/tools v0.40.0/go.mod h1:Ik/tzLRlbscWpqqMRjyWYDisX8bG13FrdXp3o4Sr9lc=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/tools v0.42.0 h1:uNgphsn75Tdz5Ji2q36v/nsFSfR/9BRFvqhGBaJGd5k=
+golang.org/x/tools v0.42.0/go.mod h1:Ma6lCIwGZvHK6XtgbswSoWroEkhugApmsXyrUmBhfr0=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
 google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/genproto/googleapis/api v0.0.0-20251222181119-0a764e51fe1b h1:uA40e2M6fYRBf0+8uN5mLlqUtV192iiksiICIBkYJ1E=
-google.golang.org/genproto/googleapis/api v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:Xa7le7qx2vmqB/SzWUBa7KdMjpdpAHlh5QCSnjessQk=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
+google.golang.org/genproto/googleapis/api v0.0.0-20260217215200-42d3e9bedb6d h1:EocjzKLywydp5uZ5tJ79iP6Q0UjDnyiHkGRWxuPBP8s=
+google.golang.org/genproto/googleapis/api v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:48U2I+QQUYhsFrg2SY6r+nJzeOtjey7j//WBESw+qyQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
+google.golang.org/grpc v1.79.3 h1:sybAEdRIEtvcD68Gx7dmnwjZKlyfuc61Dyo9pGXXkKE=
+google.golang.org/grpc v1.79.3/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
 google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -444,18 +486,18 @@ gorm.io/gorm v1.31.1 h1:7CA8FTFz/gRfgqgpeKIBcervUn3xSyPUmr6B2WXJ7kg=
 gorm.io/gorm v1.31.1/go.mod h1:XyQVbO2k6YkOis7C2437jSit3SsDK72s7n7rsSHd+Gs=
 modernc.org/cc/v4 v4.27.1 h1:9W30zRlYrefrDV2JE2O8VDtJ1yPGownxciz5rrbQZis=
 modernc.org/cc/v4 v4.27.1/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
-modernc.org/ccgo/v4 v4.30.1 h1:4r4U1J6Fhj98NKfSjnPUN7Ze2c6MnAdL0hWw6+LrJpc=
-modernc.org/ccgo/v4 v4.30.1/go.mod h1:bIOeI1JL54Utlxn+LwrFyjCx2n2RDiYEaJVSrgdrRfM=
+modernc.org/ccgo/v4 v4.30.2 h1:4yPaaq9dXYXZ2V8s1UgrC3KIj580l2N4ClrLwnbv2so=
+modernc.org/ccgo/v4 v4.30.2/go.mod h1:yZMnhWEdW0qw3EtCndG1+ldRrVGS+bIwyWmAWzS0XEw=
 modernc.org/fileutil v1.3.40 h1:ZGMswMNc9JOCrcrakF1HrvmergNLAmxOPjizirpfqBA=
 modernc.org/fileutil v1.3.40/go.mod h1:HxmghZSZVAz/LXcMNwZPA/DRrQZEVP9VX0V4LQGQFOc=
 modernc.org/gc/v2 v2.6.5 h1:nyqdV8q46KvTpZlsw66kWqwXRHdjIlJOhG6kxiV/9xI=
 modernc.org/gc/v2 v2.6.5/go.mod h1:YgIahr1ypgfe7chRuJi2gD7DBQiKSLMPgBQe9oIiito=
-modernc.org/gc/v3 v3.1.1 h1:k8T3gkXWY9sEiytKhcgyiZ2L0DTyCQ/nvX+LoCljoRE=
-modernc.org/gc/v3 v3.1.1/go.mod h1:HFK/6AGESC7Ex+EZJhJ2Gni6cTaYpSMmU/cT9RmlfYY=
+modernc.org/gc/v3 v3.1.2 h1:ZtDCnhonXSZexk/AYsegNRV1lJGgaNZJuKjJSWKyEqo=
+modernc.org/gc/v3 v3.1.2/go.mod h1:HFK/6AGESC7Ex+EZJhJ2Gni6cTaYpSMmU/cT9RmlfYY=
 modernc.org/goabi0 v0.2.0 h1:HvEowk7LxcPd0eq6mVOAEMai46V+i7Jrj13t4AzuNks=
 modernc.org/goabi0 v0.2.0/go.mod h1:CEFRnnJhKvWT1c1JTI3Avm+tgOWbkOu5oPA8eH8LnMI=
-modernc.org/libc v1.67.4 h1:zZGmCMUVPORtKv95c2ReQN5VDjvkoRm9GWPTEPuvlWg=
-modernc.org/libc v1.67.4/go.mod h1:QvvnnJ5P7aitu0ReNpVIEyesuhmDLQ8kaEoyMjIFZJA=
+modernc.org/libc v1.68.0 h1:PJ5ikFOV5pwpW+VqCK1hKJuEWsonkIJhhIXyuF/91pQ=
+modernc.org/libc v1.68.0/go.mod h1:NnKCYeoYgsEqnY3PgvNgAeaJnso968ygU8Z0DxjoEc0=
 modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
 modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
 modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
@@ -464,8 +506,8 @@ modernc.org/opt v0.1.4 h1:2kNGMRiUjrp4LcaPuLY2PzUfqM/w9N23quVwhKt5Qm8=
 modernc.org/opt v0.1.4/go.mod h1:03fq9lsNfvkYSfxrfUhZCWPk1lm4cq4N+Bh//bEtgns=
 modernc.org/sortutil v1.2.1 h1:+xyoGf15mM3NMlPDnFqrteY07klSFxLElE2PVuWIJ7w=
 modernc.org/sortutil v1.2.1/go.mod h1:7ZI3a3REbai7gzCLcotuw9AC4VZVpYMjDzETGsSMqJE=
-modernc.org/sqlite v1.42.2 h1:7hkZUNJvJFN2PgfUdjni9Kbvd4ef4mNLOu0B9FGxM74=
-modernc.org/sqlite v1.42.2/go.mod h1:+VkC6v3pLOAE0A0uVucQEcbVW0I5nHCeDaBf+DpsQT8=
+modernc.org/sqlite v1.46.1 h1:eFJ2ShBLIEnUWlLy12raN0Z1plqmFX9Qe3rjQTKt6sU=
+modernc.org/sqlite v1.46.1/go.mod h1:CzbrU2lSB1DKUusvwGz7rqEKIq+NUd8GWuBBZDs9/nA=
 modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0=
 modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A=
 modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
--- a/backend/internal/bootstrap/app_images_bootstrap.go
+++ b/backend/internal/bootstrap/app_images_bootstrap.go
@@ -12,6 +12,7 @@ import (
 	"log/slog"
 	"os"
 	"path"
+	"strings"

 	"github.com/pocket-id/pocket-id/backend/internal/storage"
 	"github.com/pocket-id/pocket-id/backend/internal/utils"
@@ -20,6 +21,8 @@ import (

 // initApplicationImages copies the images from the embedded directory to the storage backend
 // and returns a map containing the detected file extensions in the application-images directory.
+//
+//nolint:gocognit
 func initApplicationImages(ctx context.Context, fileStorage storage.FileStorage) (map[string]string, error) {
 	// Previous versions of images
 	// If these are found, they are deleted
@@ -76,6 +79,18 @@ func initApplicationImages(ctx context.Context, fileStorage storage.FileStorage)
 		dstNameToExt[nameWithoutExt] = ext
 	}

+	initedPath := path.Join("application-images", ".inited")
+	if _, _, err := fileStorage.Open(ctx, initedPath); err == nil {
+		return dstNameToExt, nil
+	} else if !os.IsNotExist(err) {
+		return nil, fmt.Errorf("failed to read .inited: %w", err)
+	} else {
+		err := fileStorage.Save(ctx, initedPath, strings.NewReader(""))
+		if err != nil {
+			return nil, fmt.Errorf("failed to store .inited: %w", err)
+		}
+	}
+
 	// Copy images from the images directory to the application-images directory if they don't already exist
 	for _, sourceFile := range sourceFiles {
 		if sourceFile.IsDir() {
--- a/backend/internal/bootstrap/bootstrap.go
+++ b/backend/internal/bootstrap/bootstrap.go
@@ -2,6 +2,7 @@ package bootstrap

 import (
 	"context"
+	"errors"
 	"fmt"
 	"log/slog"
 	"time"
@@ -11,6 +12,7 @@ import (

 	"github.com/pocket-id/pocket-id/backend/internal/common"
 	"github.com/pocket-id/pocket-id/backend/internal/job"
+	"github.com/pocket-id/pocket-id/backend/internal/service"
 	"github.com/pocket-id/pocket-id/backend/internal/storage"
 	"github.com/pocket-id/pocket-id/backend/internal/utils"
 )
@@ -48,14 +50,21 @@ func Bootstrap(ctx context.Context) error {
 		return fmt.Errorf("failed to initialize application images: %w", err)
 	}

+	scheduler, err := job.NewScheduler()
+	if err != nil {
+		return fmt.Errorf("failed to create job scheduler: %w", err)
+	}
+
 	// Create all services
-	svc, err := initServices(ctx, db, httpClient, imageExtensions, fileStorage)
+	svc, err := initServices(ctx, db, httpClient, imageExtensions, fileStorage, scheduler)
 	if err != nil {
 		return fmt.Errorf("failed to initialize services: %w", err)
 	}

 	waitUntil, err := svc.appLockService.Acquire(ctx, false)
-	if err != nil {
+	if errors.Is(err, service.ErrLockUnavailable) {
+		return errors.New("it appears that there's already one instance of Pocket ID running; running multiple replicas of Pocket ID is currently not supported")
+	} else if err != nil {
 		return fmt.Errorf("failed to acquire application lock: %w", err)
 	}

@@ -74,11 +83,7 @@ func Bootstrap(ctx context.Context) error {
 	}
 	shutdownFns = append(shutdownFns, shutdownFn)

-	// Init the job scheduler
-	scheduler, err := job.NewScheduler()
-	if err != nil {
-		return fmt.Errorf("failed to create job scheduler: %w", err)
-	}
+	// Register scheduled jobs
 	err = registerScheduledJobs(ctx, db, svc, httpClient, scheduler)
 	if err != nil {
 		return fmt.Errorf("failed to register scheduled jobs: %w", err)
--- a/backend/internal/bootstrap/db_bootstrap.go
+++ b/backend/internal/bootstrap/db_bootstrap.go
@@ -34,7 +34,8 @@ func NewDatabase() (db *gorm.DB, err error) {
 	}

 	// Run migrations
-	if err := utils.MigrateDatabase(sqlDb); err != nil {
+	err = utils.MigrateDatabase(sqlDb)
+	if err != nil {
 		return nil, fmt.Errorf("failed to run migrations: %w", err)
 	}

@@ -42,7 +43,10 @@ func NewDatabase() (db *gorm.DB, err error) {
 }

 func ConnectDatabase() (db *gorm.DB, err error) {
-	var dialector gorm.Dialector
+	var (
+		dialector               gorm.Dialector
+		sqliteNetworkFilesystem bool
+	)

 	// Choose the correct database provider
 	var onConnFn func(conn *sql.DB)
@@ -63,6 +67,14 @@ func ConnectDatabase() (db *gorm.DB, err error) {
 			if err := ensureSqliteDatabaseDir(dbPath); err != nil {
 				return nil, err
 			}
+
+			sqliteNetworkFilesystem, err = utils.IsNetworkedFileSystem(filepath.Dir(dbPath))
+			if err != nil {
+				// Log the error only
+				slog.Warn("Failed to detect filesystem type for the SQLite database directory", slog.String("path", filepath.Dir(dbPath)), slog.Any("error", err))
+			} else if sqliteNetworkFilesystem {
+				slog.Warn("⚠️⚠️⚠️ SQLite databases should not be stored on a networked file system like NFS, SMB, or FUSE, as there's a risk of crashes and even database corruption", slog.String("path", filepath.Dir(dbPath)))
+			}
 		}

 		// Before we connect, also make sure that there's a temporary folder for SQLite to write its data
--- a/backend/internal/bootstrap/observability_boostrap.go
+++ b/backend/internal/bootstrap/observability_boostrap.go
@@ -118,11 +118,10 @@ func initOtelLogging(ctx context.Context, resource *resource.Resource) error {
 	// Set the logger provider globally
 	globallog.SetLoggerProvider(provider)

-	// Wrap the handler in a "fanout" one
-	handler = utils.LogFanoutHandler{
+	handler = slog.NewMultiHandler(
 		handler,
 		otelslog.NewHandler(common.Name, otelslog.WithLoggerProvider(provider)),
-	}
+	)

 	// Set the default slog to send logs to OTel and add the app name
 	log := slog.New(handler).
--- a/backend/internal/bootstrap/router_bootstrap.go
+++ b/backend/internal/bootstrap/router_bootstrap.go
@@ -15,6 +15,8 @@ import (
 	sloggin "github.com/gin-contrib/slog"
 	"github.com/gin-gonic/gin"
 	"go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin"
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/h2c"
 	"golang.org/x/time/rate"
 	"gorm.io/gorm"

@@ -47,12 +49,14 @@ func initRouter(db *gorm.DB, svc *services) (utils.Service, error) {
 		_ = r.SetTrustedProxies(nil)
 	}

+	if common.EnvConfig.TrustedPlatform != "" {
+		r.TrustedPlatform = common.EnvConfig.TrustedPlatform
+	}
+
 	if common.EnvConfig.TracingEnabled {
 		r.Use(otelgin.Middleware(common.Name))
 	}

-	rateLimitMiddleware := middleware.NewRateLimitMiddleware().Add(rate.Every(time.Second), 60)
-
 	// Setup global middleware
 	r.Use(middleware.HeadMiddleware())
 	r.Use(middleware.NewCacheControlMiddleware().Add())
@@ -60,7 +64,8 @@ func initRouter(db *gorm.DB, svc *services) (utils.Service, error) {
 	r.Use(middleware.NewCspMiddleware().Add())
 	r.Use(middleware.NewErrorHandlerMiddleware().Add())

-	err := frontend.RegisterFrontend(r)
+	frontendRateLimitMiddleware := middleware.NewRateLimitMiddleware().Add(rate.Every(100*time.Millisecond), 300)
+	err := frontend.RegisterFrontend(r, frontendRateLimitMiddleware)
 	if errors.Is(err, frontend.ErrFrontendNotIncluded) {
 		slog.Warn("Frontend is not included in the build. Skipping frontend registration.")
 	} else if err != nil {
@@ -71,19 +76,22 @@ func initRouter(db *gorm.DB, svc *services) (utils.Service, error) {
 	authMiddleware := middleware.NewAuthMiddleware(svc.apiKeyService, svc.userService, svc.jwtService)
 	fileSizeLimitMiddleware := middleware.NewFileSizeLimitMiddleware()

+	apiRateLimitMiddleware := middleware.NewRateLimitMiddleware().Add(rate.Every(time.Second), 100)
+
 	// Set up API routes
-	apiGroup := r.Group("/api", rateLimitMiddleware)
+	apiGroup := r.Group("/api", apiRateLimitMiddleware)
 	controller.NewApiKeyController(apiGroup, authMiddleware, svc.apiKeyService)
 	controller.NewWebauthnController(apiGroup, authMiddleware, middleware.NewRateLimitMiddleware(), svc.webauthnService, svc.appConfigService)
 	controller.NewOidcController(apiGroup, authMiddleware, fileSizeLimitMiddleware, svc.oidcService, svc.jwtService)
-	controller.NewUserController(apiGroup, authMiddleware, middleware.NewRateLimitMiddleware(), svc.userService, svc.appConfigService)
+	controller.NewUserController(apiGroup, authMiddleware, middleware.NewRateLimitMiddleware(), svc.userService, svc.oneTimeAccessService, svc.appConfigService)
 	controller.NewAppConfigController(apiGroup, authMiddleware, svc.appConfigService, svc.emailService, svc.ldapService)
 	controller.NewAppImagesController(apiGroup, authMiddleware, svc.appImagesService)
 	controller.NewAuditLogController(apiGroup, svc.auditLogService, authMiddleware)
 	controller.NewUserGroupController(apiGroup, authMiddleware, svc.userGroupService)
 	controller.NewCustomClaimController(apiGroup, authMiddleware, svc.customClaimService)
-	controller.NewVersionController(apiGroup, svc.versionService)
+	controller.NewVersionController(apiGroup, authMiddleware, svc.versionService)
 	controller.NewScimController(apiGroup, authMiddleware, svc.scimService)
+	controller.NewUserSignupController(apiGroup, authMiddleware, middleware.NewRateLimitMiddleware(), svc.userSignUpService, svc.appConfigService)

 	// Add test controller in non-production environments
 	if !common.EnvConfig.AppEnv.IsProduction() {
@@ -93,18 +101,23 @@ func initRouter(db *gorm.DB, svc *services) (utils.Service, error) {
 	}

 	// Set up base routes
-	baseGroup := r.Group("/", rateLimitMiddleware)
+	baseGroup := r.Group("/", apiRateLimitMiddleware)
 	controller.NewWellKnownController(baseGroup, svc.jwtService)

 	// Set up healthcheck routes
 	// These are not rate-limited
 	controller.NewHealthzController(r)

+	var protocols http.Protocols
+	protocols.SetHTTP1(true)
+	protocols.SetUnencryptedHTTP2(true)
+
 	// Set up the server
 	srv := &http.Server{
 		MaxHeaderBytes:    1 << 20,
 		ReadHeaderTimeout: 10 * time.Second,
-		Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		Protocols:         &protocols,
+		Handler: h2c.NewHandler(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 			// HEAD requests don't get matched by Gin routes, so we convert them to GET
 			// middleware.HeadMiddleware will convert them back to HEAD later
 			if req.Method == http.MethodHead {
@@ -114,7 +127,7 @@ func initRouter(db *gorm.DB, svc *services) (utils.Service, error) {
 			}

 			r.ServeHTTP(w, req)
-		}),
+		}), &http2.Server{}),
 	}

 	// Set up the listener
--- a/backend/internal/bootstrap/scheduler_bootstrap.go
+++ b/backend/internal/bootstrap/scheduler_bootstrap.go
@@ -35,6 +35,10 @@ func registerScheduledJobs(ctx context.Context, db *gorm.DB, svc *services, http
 	if err != nil {
 		return fmt.Errorf("failed to register analytics job in scheduler: %w", err)
 	}
+	err = scheduler.RegisterScimJobs(ctx, svc.scimService)
+	if err != nil {
+		return fmt.Errorf("failed to register SCIM scheduler job: %w", err)
+	}

 	return nil
 }
--- a/backend/internal/bootstrap/services_bootstrap.go
+++ b/backend/internal/bootstrap/services_bootstrap.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net/http"

+	"github.com/pocket-id/pocket-id/backend/internal/job"
 	"gorm.io/gorm"

 	"github.com/pocket-id/pocket-id/backend/internal/service"
@@ -20,7 +21,6 @@ type services struct {
 	jwtService           *service.JwtService
 	webauthnService      *service.WebAuthnService
 	scimService          *service.ScimService
-	scimSchedulerService *service.ScimSchedulerService
 	userService          *service.UserService
 	customClaimService   *service.CustomClaimService
 	oidcService          *service.OidcService
@@ -30,10 +30,12 @@ type services struct {
 	versionService       *service.VersionService
 	fileStorage          storage.FileStorage
 	appLockService       *service.AppLockService
+	userSignUpService    *service.UserSignUpService
+	oneTimeAccessService *service.OneTimeAccessService
 }

 // Initializes all services
-func initServices(ctx context.Context, db *gorm.DB, httpClient *http.Client, imageExtensions map[string]string, fileStorage storage.FileStorage) (svc *services, err error) {
+func initServices(ctx context.Context, db *gorm.DB, httpClient *http.Client, imageExtensions map[string]string, fileStorage storage.FileStorage, scheduler *job.Scheduler) (svc *services, err error) {
 	svc = &services{}

 	svc.appConfigService, err = service.NewAppConfigService(ctx, db)
@@ -52,7 +54,7 @@ func initServices(ctx context.Context, db *gorm.DB, httpClient *http.Client, ima

 	svc.geoLiteService = service.NewGeoLiteService(httpClient)
 	svc.auditLogService = service.NewAuditLogService(db, svc.appConfigService, svc.emailService, svc.geoLiteService)
-	svc.jwtService, err = service.NewJwtService(db, svc.appConfigService)
+	svc.jwtService, err = service.NewJwtService(ctx, db, svc.appConfigService)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create JWT service: %w", err)
 	}
@@ -63,21 +65,25 @@ func initServices(ctx context.Context, db *gorm.DB, httpClient *http.Client, ima
 		return nil, fmt.Errorf("failed to create WebAuthn service: %w", err)
 	}

-	svc.oidcService, err = service.NewOidcService(ctx, db, svc.jwtService, svc.appConfigService, svc.auditLogService, svc.customClaimService, svc.webauthnService, httpClient, fileStorage)
+	svc.scimService = service.NewScimService(db, scheduler, httpClient)
+
+	svc.oidcService, err = service.NewOidcService(ctx, db, svc.jwtService, svc.appConfigService, svc.auditLogService, svc.customClaimService, svc.webauthnService, svc.scimService, httpClient, fileStorage)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create OIDC service: %w", err)
 	}

-	svc.userGroupService = service.NewUserGroupService(db, svc.appConfigService)
-	svc.userService = service.NewUserService(db, svc.jwtService, svc.auditLogService, svc.emailService, svc.appConfigService, svc.customClaimService, svc.appImagesService, fileStorage)
+	svc.userGroupService = service.NewUserGroupService(db, svc.appConfigService, svc.scimService)
+	svc.userService = service.NewUserService(db, svc.jwtService, svc.auditLogService, svc.emailService, svc.appConfigService, svc.customClaimService, svc.appImagesService, svc.scimService, fileStorage)
 	svc.ldapService = service.NewLdapService(db, httpClient, svc.appConfigService, svc.userService, svc.userGroupService, fileStorage)
-	svc.apiKeyService = service.NewApiKeyService(db, svc.emailService)
-	svc.scimService = service.NewScimService(db, httpClient)
-	svc.scimSchedulerService, err = service.NewScimSchedulerService(ctx, svc.scimService)
+
+	svc.apiKeyService, err = service.NewApiKeyService(ctx, db, svc.emailService)
 	if err != nil {
-		return nil, fmt.Errorf("failed to create SCIM scheduler service: %w", err)
+		return nil, fmt.Errorf("failed to create API key service: %w", err)
 	}

+	svc.userSignUpService = service.NewUserSignupService(db, svc.jwtService, svc.auditLogService, svc.appConfigService, svc.userService)
+	svc.oneTimeAccessService = service.NewOneTimeAccessService(db, svc.userService, svc.jwtService, svc.auditLogService, svc.emailService, svc.appConfigService)
+
 	svc.versionService = service.NewVersionService(httpClient)

 	return svc, nil
--- a/backend/internal/cmds/encryption_key_rotate.go
+++ b/backend/internal/cmds/encryption_key_rotate.go
@@ -0,0 +1,187 @@
+package cmds
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/pocket-id/pocket-id/backend/internal/model"
+	"github.com/spf13/cobra"
+	"gorm.io/gorm"
+
+	"github.com/pocket-id/pocket-id/backend/internal/bootstrap"
+	"github.com/pocket-id/pocket-id/backend/internal/common"
+	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
+	"github.com/pocket-id/pocket-id/backend/internal/service"
+	"github.com/pocket-id/pocket-id/backend/internal/utils"
+	jwkutils "github.com/pocket-id/pocket-id/backend/internal/utils/jwk"
+)
+
+type encryptionKeyRotateFlags struct {
+	NewKey string
+	Yes    bool
+}
+
+func init() {
+	var flags encryptionKeyRotateFlags
+
+	encryptionKeyRotateCmd := &cobra.Command{
+		Use:   "encryption-key-rotate",
+		Short: "Re-encrypts data using a new encryption key",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			db, err := bootstrap.NewDatabase()
+			if err != nil {
+				return err
+			}
+
+			return encryptionKeyRotate(cmd.Context(), flags, db, &common.EnvConfig)
+		},
+	}
+
+	encryptionKeyRotateCmd.Flags().StringVar(&flags.NewKey, "new-key", "", "New encryption key to re-encrypt data with")
+	encryptionKeyRotateCmd.Flags().BoolVarP(&flags.Yes, "yes", "y", false, "Do not prompt for confirmation")
+
+	rootCmd.AddCommand(encryptionKeyRotateCmd)
+}
+
+func encryptionKeyRotate(ctx context.Context, flags encryptionKeyRotateFlags, db *gorm.DB, envConfig *common.EnvConfigSchema) error {
+	oldKey := envConfig.EncryptionKey
+	newKey := []byte(flags.NewKey)
+	if len(newKey) == 0 {
+		return errors.New("new encryption key is required (--new-key)")
+	}
+	if len(newKey) < 16 {
+		return errors.New("new encryption key must be at least 16 bytes long")
+	}
+
+	if !flags.Yes {
+		fmt.Println("WARNING: Rotating the encryption key will re-encrypt secrets in the database. Pocket-ID must be restarted with the new ENCRYPTION_KEY after rotation is complete.")
+		ok, err := utils.PromptForConfirmation("Continue")
+		if err != nil {
+			return err
+		}
+		if !ok {
+			fmt.Println("Aborted")
+			os.Exit(1)
+		}
+	}
+
+	appConfigService, err := service.NewAppConfigService(ctx, db)
+	if err != nil {
+		return fmt.Errorf("failed to create app config service: %w", err)
+	}
+	instanceID := appConfigService.GetDbConfig().InstanceID.Value
+
+	// Derive the encryption keys used for the JWK encryption
+	oldKek, err := jwkutils.LoadKeyEncryptionKey(&common.EnvConfigSchema{EncryptionKey: oldKey}, instanceID)
+	if err != nil {
+		return fmt.Errorf("failed to derive old key encryption key: %w", err)
+	}
+	newKek, err := jwkutils.LoadKeyEncryptionKey(&common.EnvConfigSchema{EncryptionKey: newKey}, instanceID)
+	if err != nil {
+		return fmt.Errorf("failed to derive new key encryption key: %w", err)
+	}
+
+	// Derive the encryption keys used for EncryptedString fields
+	oldEncKey, err := datatype.DeriveEncryptedStringKey(oldKey)
+	if err != nil {
+		return fmt.Errorf("failed to derive old encrypted string key: %w", err)
+	}
+	newEncKey, err := datatype.DeriveEncryptedStringKey(newKey)
+	if err != nil {
+		return fmt.Errorf("failed to derive new encrypted string key: %w", err)
+	}
+
+	err = db.Transaction(func(tx *gorm.DB) error {
+		err = rotateSigningKeyEncryption(ctx, tx, oldKek, newKek)
+		if err != nil {
+			return err
+		}
+
+		err = rotateScimTokens(tx, oldEncKey, newEncKey)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+
+	fmt.Println("Encryption key rotation completed successfully.")
+	fmt.Println("Restart pocket-id with the new ENCRYPTION_KEY to use the rotated data.")
+
+	return nil
+}
+
+func rotateSigningKeyEncryption(ctx context.Context, db *gorm.DB, oldKek []byte, newKek []byte) error {
+	oldProvider := &jwkutils.KeyProviderDatabase{}
+	err := oldProvider.Init(jwkutils.KeyProviderOpts{
+		DB:  db,
+		Kek: oldKek,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to init key provider with old encryption key: %w", err)
+	}
+
+	key, err := oldProvider.LoadKey(ctx)
+	if err != nil {
+		return fmt.Errorf("failed to load signing key using old encryption key: %w", err)
+	}
+	if key == nil {
+		return nil
+	}
+
+	newProvider := &jwkutils.KeyProviderDatabase{}
+	err = newProvider.Init(jwkutils.KeyProviderOpts{
+		DB:  db,
+		Kek: newKek,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to init key provider with new encryption key: %w", err)
+	}
+
+	if err := newProvider.SaveKey(ctx, key); err != nil {
+		return fmt.Errorf("failed to store signing key with new encryption key: %w", err)
+	}
+
+	return nil
+}
+
+type scimTokenRow struct {
+	ID    string
+	Token string
+}
+
+func rotateScimTokens(db *gorm.DB, oldEncKey []byte, newEncKey []byte) error {
+	var rows []scimTokenRow
+	err := db.Model(&model.ScimServiceProvider{}).Select("id, token").Scan(&rows).Error
+	if err != nil {
+		return fmt.Errorf("failed to list SCIM service providers: %w", err)
+	}
+
+	for _, row := range rows {
+		if row.Token == "" {
+			continue
+		}
+
+		decBytes, err := datatype.DecryptEncryptedStringWithKey(oldEncKey, row.Token)
+		if err != nil {
+			return fmt.Errorf("failed to decrypt SCIM token for provider %s: %w", row.ID, err)
+		}
+
+		encValue, err := datatype.EncryptEncryptedStringWithKey(newEncKey, decBytes)
+		if err != nil {
+			return fmt.Errorf("failed to encrypt SCIM token for provider %s: %w", row.ID, err)
+		}
+
+		err = db.Model(&model.ScimServiceProvider{}).Where("id = ?", row.ID).Update("token", encValue).Error
+		if err != nil {
+			return fmt.Errorf("failed to update SCIM token for provider %s: %w", row.ID, err)
+		}
+	}
+
+	return nil
+}
--- a/backend/internal/cmds/encryption_key_rotate_test.go
+++ b/backend/internal/cmds/encryption_key_rotate_test.go
@@ -0,0 +1,89 @@
+package cmds
+
+import (
+	"testing"
+	"time"
+
+	"github.com/pocket-id/pocket-id/backend/internal/model"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/pocket-id/pocket-id/backend/internal/common"
+	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
+	"github.com/pocket-id/pocket-id/backend/internal/service"
+	jwkutils "github.com/pocket-id/pocket-id/backend/internal/utils/jwk"
+	testingutils "github.com/pocket-id/pocket-id/backend/internal/utils/testing"
+)
+
+func TestEncryptionKeyRotate(t *testing.T) {
+	oldKey := []byte("old-encryption-key-123456")
+	newKey := []byte("new-encryption-key-654321")
+
+	envConfig := &common.EnvConfigSchema{
+		EncryptionKey: oldKey,
+	}
+
+	db := testingutils.NewDatabaseForTest(t)
+
+	appConfigService, err := service.NewAppConfigService(t.Context(), db)
+	require.NoError(t, err)
+	instanceID := appConfigService.GetDbConfig().InstanceID.Value
+
+	oldKek, err := jwkutils.LoadKeyEncryptionKey(envConfig, instanceID)
+	require.NoError(t, err)
+
+	oldProvider := &jwkutils.KeyProviderDatabase{}
+	require.NoError(t, oldProvider.Init(jwkutils.KeyProviderOpts{
+		DB:  db,
+		Kek: oldKek,
+	}))
+
+	signingKey, err := jwkutils.GenerateKey("RS256", "")
+	require.NoError(t, err)
+	require.NoError(t, oldProvider.SaveKey(t.Context(), signingKey))
+
+	oldEncKey, err := datatype.DeriveEncryptedStringKey(oldKey)
+	require.NoError(t, err)
+	encToken, err := datatype.EncryptEncryptedStringWithKey(oldEncKey, []byte("scim-token-123"))
+	require.NoError(t, err)
+
+	err = db.Exec(
+		`INSERT INTO scim_service_providers (id, created_at, endpoint, token, oidc_client_id) VALUES (?, ?, ?, ?, ?)`,
+		"scim-1",
+		time.Now(),
+		"https://example.com/scim",
+		encToken,
+		"client-1",
+	).Error
+	require.NoError(t, err)
+
+	flags := encryptionKeyRotateFlags{
+		NewKey: string(newKey),
+		Yes:    true,
+	}
+	require.NoError(t, encryptionKeyRotate(t.Context(), flags, db, envConfig))
+
+	newKek, err := jwkutils.LoadKeyEncryptionKey(&common.EnvConfigSchema{EncryptionKey: newKey}, instanceID)
+	require.NoError(t, err)
+
+	newProvider := &jwkutils.KeyProviderDatabase{}
+	require.NoError(t, newProvider.Init(jwkutils.KeyProviderOpts{
+		DB:  db,
+		Kek: newKek,
+	}))
+
+	rotatedKey, err := newProvider.LoadKey(t.Context())
+	require.NoError(t, err)
+	require.NotNil(t, rotatedKey)
+
+	var storedToken string
+	err = db.Model(&model.ScimServiceProvider{}).Where("id = ?", "scim-1").Pluck("token", &storedToken).Error
+	require.NoError(t, err)
+
+	newEncKey, err := datatype.DeriveEncryptedStringKey(newKey)
+	require.NoError(t, err)
+
+	decBytes, err := datatype.DecryptEncryptedStringWithKey(newEncKey, storedToken)
+	require.NoError(t, err)
+	assert.Equal(t, "scim-token-123", string(decBytes))
+}
--- a/backend/internal/cmds/import.go
+++ b/backend/internal/cmds/import.go
@@ -119,11 +119,10 @@ func acquireImportLock(ctx context.Context, db *gorm.DB, force bool) error {
 	defer cancel()

 	waitUntil, err := appLockService.Acquire(opCtx, force)
-	if err != nil {
-		if errors.Is(err, service.ErrLockUnavailable) {
-			//nolint:staticcheck
-			return errors.New("Pocket ID must be stopped before importing data; please stop the running instance or run with --forcefully-acquire-lock to terminate the other instance")
-		}
+	if errors.Is(err, service.ErrLockUnavailable) {
+		//nolint:staticcheck
+		return errors.New("Pocket ID must be stopped before importing data; please stop the running instance or run with --forcefully-acquire-lock to terminate the other instance")
+	} else if err != nil {
 		return fmt.Errorf("failed to acquire application lock: %w", err)
 	}

--- a/backend/internal/cmds/key_rotate.go
+++ b/backend/internal/cmds/key_rotate.go
@@ -102,7 +102,7 @@ func keyRotate(ctx context.Context, flags keyRotateFlags, db *gorm.DB, envConfig
 	}

 	// Save the key
-	err = keyProvider.SaveKey(key)
+	err = keyProvider.SaveKey(ctx, key)
 	if err != nil {
 		return fmt.Errorf("failed to store new key: %w", err)
 	}
--- a/backend/internal/cmds/key_rotate_test.go
+++ b/backend/internal/cmds/key_rotate_test.go
@@ -104,7 +104,7 @@ func testKeyRotateWithDatabaseStorage(t *testing.T, flags keyRotateFlags, wantEr
 	require.NoError(t, err)

 	// Verify key was created
-	key, err := keyProvider.LoadKey()
+	key, err := keyProvider.LoadKey(t.Context())
 	require.NoError(t, err)
 	require.NotNil(t, key)

--- a/backend/internal/common/env_config.go
+++ b/backend/internal/common/env_config.go
@@ -44,11 +44,15 @@ type EnvConfigSchema struct {
 	DbProvider            DbProvider
 	DbConnectionString    string `env:"DB_CONNECTION_STRING" options:"file"`
 	TrustProxy            bool   `env:"TRUST_PROXY"`
+	TrustedPlatform       string `env:"TRUSTED_PLATFORM"`
 	AuditLogRetentionDays int    `env:"AUDIT_LOG_RETENTION_DAYS"`
 	AnalyticsDisabled     bool   `env:"ANALYTICS_DISABLED"`
 	AllowDowngrade        bool   `env:"ALLOW_DOWNGRADE"`
 	InternalAppURL        string `env:"INTERNAL_APP_URL"`
 	UiConfigDisabled      bool   `env:"UI_CONFIG_DISABLED"`
+	DisableRateLimiting   bool   `env:"DISABLE_RATE_LIMITING"`
+	VersionCheckDisabled  bool   `env:"VERSION_CHECK_DISABLED"`
+	StaticApiKey          string `env:"STATIC_API_KEY" options:"file"`

 	FileBackend                     string `env:"FILE_BACKEND" options:"toLower"`
 	UploadPath                      string `env:"UPLOAD_PATH"`
@@ -103,7 +107,7 @@ func defaultConfig() EnvConfigSchema {

 func parseEnvConfig() error {
 	parsers := map[reflect.Type]env.ParserFunc{
-		reflect.TypeOf([]byte{}): func(value string) (interface{}, error) {
+		reflect.TypeFor[[]byte](): func(value string) (any, error) {
 			return []byte(value), nil
 		},
 	}
@@ -126,6 +130,10 @@ func parseEnvConfig() error {

 // ValidateEnvConfig checks the EnvConfig for required fields and valid values
 func ValidateEnvConfig(config *EnvConfigSchema) error {
+	if shouldSkipEnvValidation(os.Args) {
+		return nil
+	}
+
 	if _, err := sloggin.ParseLevel(config.LogLevel); err != nil {
 		return errors.New("invalid LOG_LEVEL value. Must be 'debug', 'info', 'warn' or 'error'")
 	}
@@ -177,8 +185,8 @@ func ValidateEnvConfig(config *EnvConfigSchema) error {
 	}

 	// Validate LOCAL_IPV6_RANGES
-	ranges := strings.Split(config.LocalIPv6Ranges, ",")
-	for _, rangeStr := range ranges {
+	ranges := strings.SplitSeq(config.LocalIPv6Ranges, ",")
+	for rangeStr := range ranges {
 		rangeStr = strings.TrimSpace(rangeStr)
 		if rangeStr == "" {
 			continue
@@ -199,10 +207,25 @@ func ValidateEnvConfig(config *EnvConfigSchema) error {
 		return errors.New("AUDIT_LOG_RETENTION_DAYS must be greater than 0")
 	}

+	if config.StaticApiKey != "" && len(config.StaticApiKey) < 16 {
+		return errors.New("STATIC_API_KEY must be at least 16 characters long")
+	}
+
 	return nil

 }

+func shouldSkipEnvValidation(args []string) bool {
+	for _, arg := range args[1:] {
+		switch arg {
+		case "-h", "--help", "help", "version":
+			return true
+		}
+	}
+
+	return false
+}
+
 // prepareEnvConfig processes special options for EnvConfig fields
 func prepareEnvConfig(config *EnvConfigSchema) error {
 	val := reflect.ValueOf(config).Elem()
@@ -213,9 +236,9 @@ func prepareEnvConfig(config *EnvConfigSchema) error {
 		fieldType := typ.Field(i)

 		optionsTag := fieldType.Tag.Get("options")
-		options := strings.Split(optionsTag, ",")
+		options := strings.SplitSeq(optionsTag, ",")

-		for _, option := range options {
+		for option := range options {
 			switch option {
 			case "toLower":
 				if field.Kind() == reflect.String {
--- a/backend/internal/common/errors.go
+++ b/backend/internal/common/errors.go
@@ -20,7 +20,7 @@ type AlreadyInUseError struct {
 func (e *AlreadyInUseError) Error() string {
 	return e.Property + " is already in use"
 }
-func (e *AlreadyInUseError) HttpStatusCode() int { return 400 }
+func (e *AlreadyInUseError) HttpStatusCode() int { return http.StatusBadRequest }

 func (e *AlreadyInUseError) Is(target error) bool {
 	// Ignore the field property when checking if an error is of the type AlreadyInUseError
@@ -31,26 +31,26 @@ func (e *AlreadyInUseError) Is(target error) bool {
 type SetupAlreadyCompletedError struct{}

 func (e *SetupAlreadyCompletedError) Error() string       { return "setup already completed" }
-func (e *SetupAlreadyCompletedError) HttpStatusCode() int { return 400 }
+func (e *SetupAlreadyCompletedError) HttpStatusCode() int { return http.StatusConflict }

 type TokenInvalidOrExpiredError struct{}

 func (e *TokenInvalidOrExpiredError) Error() string       { return "token is invalid or expired" }
-func (e *TokenInvalidOrExpiredError) HttpStatusCode() int { return 400 }
+func (e *TokenInvalidOrExpiredError) HttpStatusCode() int { return http.StatusUnauthorized }

 type DeviceCodeInvalid struct{}

 func (e *DeviceCodeInvalid) Error() string {
 	return "one time access code must be used on the device it was generated for"
 }
-func (e *DeviceCodeInvalid) HttpStatusCode() int { return 400 }
+func (e *DeviceCodeInvalid) HttpStatusCode() int { return http.StatusUnauthorized }

 type TokenInvalidError struct{}

 func (e *TokenInvalidError) Error() string {
 	return "Token is invalid"
 }
-func (e *TokenInvalidError) HttpStatusCode() int { return 400 }
+func (e *TokenInvalidError) HttpStatusCode() int { return http.StatusUnauthorized }

 type OidcMissingAuthorizationError struct{}

@@ -60,46 +60,51 @@ func (e *OidcMissingAuthorizationError) HttpStatusCode() int { return http.Statu
 type OidcGrantTypeNotSupportedError struct{}

 func (e *OidcGrantTypeNotSupportedError) Error() string       { return "grant type not supported" }
-func (e *OidcGrantTypeNotSupportedError) HttpStatusCode() int { return 400 }
+func (e *OidcGrantTypeNotSupportedError) HttpStatusCode() int { return http.StatusBadRequest }

 type OidcMissingClientCredentialsError struct{}

 func (e *OidcMissingClientCredentialsError) Error() string       { return "client id or secret not provided" }
-func (e *OidcMissingClientCredentialsError) HttpStatusCode() int { return 400 }
+func (e *OidcMissingClientCredentialsError) HttpStatusCode() int { return http.StatusBadRequest }

 type OidcClientSecretInvalidError struct{}

 func (e *OidcClientSecretInvalidError) Error() string       { return "invalid client secret" }
-func (e *OidcClientSecretInvalidError) HttpStatusCode() int { return 400 }
+func (e *OidcClientSecretInvalidError) HttpStatusCode() int { return http.StatusUnauthorized }

 type OidcClientAssertionInvalidError struct{}

 func (e *OidcClientAssertionInvalidError) Error() string       { return "invalid client assertion" }
-func (e *OidcClientAssertionInvalidError) HttpStatusCode() int { return 400 }
+func (e *OidcClientAssertionInvalidError) HttpStatusCode() int { return http.StatusUnauthorized }

 type OidcInvalidAuthorizationCodeError struct{}

 func (e *OidcInvalidAuthorizationCodeError) Error() string       { return "invalid authorization code" }
-func (e *OidcInvalidAuthorizationCodeError) HttpStatusCode() int { return 400 }
+func (e *OidcInvalidAuthorizationCodeError) HttpStatusCode() int { return http.StatusBadRequest }
+
+type OidcClientNotFoundError struct{}
+
+func (e *OidcClientNotFoundError) Error() string       { return "client not found" }
+func (e *OidcClientNotFoundError) HttpStatusCode() int { return http.StatusNotFound }

 type OidcMissingCallbackURLError struct{}

 func (e *OidcMissingCallbackURLError) Error() string {
 	return "unable to detect callback url, it might be necessary for an admin to fix this"
 }
-func (e *OidcMissingCallbackURLError) HttpStatusCode() int { return 400 }
+func (e *OidcMissingCallbackURLError) HttpStatusCode() int { return http.StatusBadRequest }

 type OidcInvalidCallbackURLError struct{}

 func (e *OidcInvalidCallbackURLError) Error() string {
 	return "invalid callback URL, it might be necessary for an admin to fix this"
 }
-func (e *OidcInvalidCallbackURLError) HttpStatusCode() int { return 400 }
+func (e *OidcInvalidCallbackURLError) HttpStatusCode() int { return http.StatusBadRequest }

 type FileTypeNotSupportedError struct{}

 func (e *FileTypeNotSupportedError) Error() string       { return "file type not supported" }
-func (e *FileTypeNotSupportedError) HttpStatusCode() int { return 400 }
+func (e *FileTypeNotSupportedError) HttpStatusCode() int { return http.StatusBadRequest }

 type FileTooLargeError struct {
 	MaxSize string
@@ -134,6 +139,20 @@ func (e *TooManyRequestsError) Error() string {
 }
 func (e *TooManyRequestsError) HttpStatusCode() int { return http.StatusTooManyRequests }

+type UserIdNotProvidedError struct{}
+
+func (e *UserIdNotProvidedError) Error() string {
+	return "User id not provided"
+}
+func (e *UserIdNotProvidedError) HttpStatusCode() int { return http.StatusBadRequest }
+
+type UserNotFoundError struct{}
+
+func (e *UserNotFoundError) Error() string {
+	return "User not found"
+}
+func (e *UserNotFoundError) HttpStatusCode() int { return http.StatusNotFound }
+
 type ClientIdOrSecretNotProvidedError struct{}

 func (e *ClientIdOrSecretNotProvidedError) Error() string {
@@ -266,6 +285,13 @@ func (e *APIKeyNotFoundError) Error() string {
 }
 func (e *APIKeyNotFoundError) HttpStatusCode() int { return http.StatusUnauthorized }

+type APIKeyNotExpiredError struct{}
+
+func (e *APIKeyNotExpiredError) Error() string {
+	return "API Key is not expired yet"
+}
+func (e *APIKeyNotExpiredError) HttpStatusCode() int { return http.StatusBadRequest }
+
 type APIKeyExpirationDateError struct{}

 func (e *APIKeyExpirationDateError) Error() string {
@@ -273,6 +299,13 @@ func (e *APIKeyExpirationDateError) Error() string {
 }
 func (e *APIKeyExpirationDateError) HttpStatusCode() int { return http.StatusBadRequest }

+type APIKeyAuthNotAllowedError struct{}
+
+func (e *APIKeyAuthNotAllowedError) Error() string {
+	return "API key authentication is not allowed for this endpoint"
+}
+func (e *APIKeyAuthNotAllowedError) HttpStatusCode() int { return http.StatusForbidden }
+
 type OidcInvalidRefreshTokenError struct{}

 func (e *OidcInvalidRefreshTokenError) Error() string {
@@ -405,3 +438,13 @@ func (e *ImageNotFoundError) Error() string {
 func (e *ImageNotFoundError) HttpStatusCode() int {
 	return http.StatusNotFound
 }
+
+type InvalidEmailVerificationTokenError struct{}
+
+func (e *InvalidEmailVerificationTokenError) Error() string {
+	return "Invalid email verification token"
+}
+
+func (e *InvalidEmailVerificationTokenError) HttpStatusCode() int {
+	return http.StatusBadRequest
+}
--- a/backend/internal/controller/api_key_controller.go
+++ b/backend/internal/controller/api_key_controller.go
@@ -26,11 +26,11 @@ func NewApiKeyController(group *gin.RouterGroup, authMiddleware *middleware.Auth
 	uc := &ApiKeyController{apiKeyService: apiKeyService}

 	apiKeyGroup := group.Group("/api-keys")
-	apiKeyGroup.Use(authMiddleware.WithAdminNotRequired().Add())
 	{
-		apiKeyGroup.GET("", uc.listApiKeysHandler)
-		apiKeyGroup.POST("", uc.createApiKeyHandler)
-		apiKeyGroup.DELETE("/:id", uc.revokeApiKeyHandler)
+		apiKeyGroup.GET("", authMiddleware.WithAdminNotRequired().Add(), uc.listApiKeysHandler)
+		apiKeyGroup.POST("", authMiddleware.WithAdminNotRequired().WithApiKeyAuthDisabled().Add(), uc.createApiKeyHandler)
+		apiKeyGroup.POST("/:id/renew", authMiddleware.WithAdminNotRequired().WithApiKeyAuthDisabled().Add(), uc.renewApiKeyHandler)
+		apiKeyGroup.DELETE("/:id", authMiddleware.WithAdminNotRequired().Add(), uc.revokeApiKeyHandler)
 	}
 }

@@ -101,6 +101,41 @@ func (c *ApiKeyController) createApiKeyHandler(ctx *gin.Context) {
 	})
 }

+// renewApiKeyHandler godoc
+// @Summary Renew API key
+// @Description Renew an existing API key by ID
+// @Tags API Keys
+// @Param id path string true "API Key ID"
+// @Success 200 {object} dto.ApiKeyResponseDto "Renewed API key with new token"
+// @Router /api/api-keys/{id}/renew [post]
+func (c *ApiKeyController) renewApiKeyHandler(ctx *gin.Context) {
+	userID := ctx.GetString("userID")
+	apiKeyID := ctx.Param("id")
+
+	var input dto.ApiKeyRenewDto
+	if err := dto.ShouldBindWithNormalizedJSON(ctx, &input); err != nil {
+		_ = ctx.Error(err)
+		return
+	}
+
+	apiKey, token, err := c.apiKeyService.RenewApiKey(ctx.Request.Context(), userID, apiKeyID, input.ExpiresAt.ToTime())
+	if err != nil {
+		_ = ctx.Error(err)
+		return
+	}
+
+	var apiKeyDto dto.ApiKeyDto
+	if err := dto.MapStruct(apiKey, &apiKeyDto); err != nil {
+		_ = ctx.Error(err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, dto.ApiKeyResponseDto{
+		ApiKey: apiKeyDto,
+		Token:  token,
+	})
+}
+
 // revokeApiKeyHandler godoc
 // @Summary Revoke API key
 // @Description Revoke (delete) an existing API key by ID
--- a/backend/internal/controller/app_images_controller.go
+++ b/backend/internal/controller/app_images_controller.go
@@ -2,7 +2,9 @@ package controller

 import (
 	"net/http"
+	"slices"
 	"strconv"
+	"strings"
 	"time"

 	"github.com/gin-gonic/gin"
@@ -34,6 +36,7 @@ func NewAppImagesController(
 	group.PUT("/application-images/favicon", authMiddleware.Add(), controller.updateFaviconHandler)
 	group.PUT("/application-images/default-profile-picture", authMiddleware.Add(), controller.updateDefaultProfilePicture)

+	group.DELETE("/application-images/background", authMiddleware.Add(), controller.deleteBackgroundImageHandler)
 	group.DELETE("/application-images/default-profile-picture", authMiddleware.Add(), controller.deleteDefaultProfilePicture)
 }

@@ -192,12 +195,27 @@ func (c *AppImagesController) updateBackgroundImageHandler(ctx *gin.Context) {
 	ctx.Status(http.StatusNoContent)
 }

+// deleteBackgroundImageHandler godoc
+// @Summary Delete background image
+// @Description Delete the application background image
+// @Tags Application Images
+// @Success 204 "No Content"
+// @Router /api/application-images/background [delete]
+func (c *AppImagesController) deleteBackgroundImageHandler(ctx *gin.Context) {
+	if err := c.appImagesService.DeleteImage(ctx.Request.Context(), "background"); err != nil {
+		_ = ctx.Error(err)
+		return
+	}
+
+	ctx.Status(http.StatusNoContent)
+}
+
 // updateFaviconHandler godoc
 // @Summary Update favicon
 // @Description Update the application favicon
 // @Tags Application Images
 // @Accept multipart/form-data
-// @Param file formData file true "Favicon file (.ico)"
+// @Param file formData file true "Favicon file (.svg/.png/.ico)"
 // @Success 204 "No Content"
 // @Router /api/application-images/favicon [put]
 func (c *AppImagesController) updateFaviconHandler(ctx *gin.Context) {
@@ -208,8 +226,9 @@ func (c *AppImagesController) updateFaviconHandler(ctx *gin.Context) {
 	}

 	fileType := utils.GetFileExtension(file.Filename)
-	if fileType != "ico" {
-		_ = ctx.Error(&common.WrongFileTypeError{ExpectedFileType: ".ico"})
+	mimeType := utils.GetImageMimeType(strings.ToLower(fileType))
+	if !slices.Contains([]string{"image/svg+xml", "image/png", "image/x-icon"}, mimeType) {
+		_ = ctx.Error(&common.WrongFileTypeError{ExpectedFileType: ".svg or .png or .ico"})
 		return
 	}

--- a/backend/internal/controller/oidc_controller.go
+++ b/backend/internal/controller/oidc_controller.go
@@ -1,6 +1,7 @@
 package controller

 import (
+	"context"
 	"errors"
 	"log/slog"
 	"net/http"
@@ -24,7 +25,11 @@ import (
 // @Description Initializes all OIDC-related API endpoints for authentication and client management
 // @Tags OIDC
 func NewOidcController(group *gin.RouterGroup, authMiddleware *middleware.AuthMiddleware, fileSizeLimitMiddleware *middleware.FileSizeLimitMiddleware, oidcService *service.OidcService, jwtService *service.JwtService) {
-	oc := &OidcController{oidcService: oidcService, jwtService: jwtService}
+	oc := &OidcController{
+		oidcService:  oidcService,
+		jwtService:   jwtService,
+		createTokens: oidcService.CreateTokens,
+	}

 	group.POST("/oidc/authorize", authMiddleware.WithAdminNotRequired().Add(), oc.authorizeHandler)
 	group.POST("/oidc/authorization-required", authMiddleware.WithAdminNotRequired().Add(), oc.authorizationConfirmationRequiredHandler)
@@ -47,7 +52,7 @@ func NewOidcController(group *gin.RouterGroup, authMiddleware *middleware.AuthMi
 	group.POST("/oidc/clients/:id/secret", authMiddleware.Add(), oc.createClientSecretHandler)

 	group.GET("/oidc/clients/:id/logo", oc.getClientLogoHandler)
-	group.DELETE("/oidc/clients/:id/logo", oc.deleteClientLogoHandler)
+	group.DELETE("/oidc/clients/:id/logo", authMiddleware.Add(), oc.deleteClientLogoHandler)
 	group.POST("/oidc/clients/:id/logo", authMiddleware.Add(), fileSizeLimitMiddleware.Add(2<<20), oc.updateClientLogoHandler)

 	group.GET("/oidc/clients/:id/preview/:userId", authMiddleware.Add(), oc.getClientPreviewHandler)
@@ -68,8 +73,9 @@ func NewOidcController(group *gin.RouterGroup, authMiddleware *middleware.AuthMi
 }

 type OidcController struct {
-	oidcService *service.OidcService
-	jwtService  *service.JwtService
+	oidcService  *service.OidcService
+	jwtService   *service.JwtService
+	createTokens func(context.Context, dto.OidcCreateTokensDto) (service.CreatedTokens, error)
 }

 // authorizeHandler godoc
@@ -83,12 +89,19 @@ type OidcController struct {
 // @Router /api/oidc/authorize [post]
 func (oc *OidcController) authorizeHandler(c *gin.Context) {
 	var input dto.AuthorizeOidcClientRequestDto
-	if err := c.ShouldBindJSON(&input); err != nil {
+	err := c.ShouldBindJSON(&input)
+	if err != nil {
 		_ = c.Error(err)
 		return
 	}

-	code, callbackURL, err := oc.oidcService.Authorize(c.Request.Context(), input, c.GetString("userID"), c.ClientIP(), c.Request.UserAgent())
+	code, callbackURL, err := oc.oidcService.Authorize(
+		c.Request.Context(),
+		input,
+		c.GetString("userID"),
+		c.ClientIP(),
+		c.Request.UserAgent(),
+	)
 	if err != nil {
 		_ = c.Error(err)
 		return
@@ -144,8 +157,13 @@ func (oc *OidcController) authorizationConfirmationRequiredHandler(c *gin.Contex
 // @Success 200 {object} dto.OidcTokenResponseDto "Token response with access_token and optional id_token and refresh_token"
 // @Router /api/oidc/token [post]
 func (oc *OidcController) createTokensHandler(c *gin.Context) {
+	// Per RFC-6749, parameters passed to the /token endpoint MUST be passed in the body of the request
+	// Gin's "ShouldBind" by default reads from the query string too, so we need to reset all query string args before invoking ShouldBind
+	c.Request.URL.RawQuery = ""
+
 	var input dto.OidcCreateTokensDto
-	if err := c.ShouldBind(&input); err != nil {
+	err := c.ShouldBind(&input)
+	if err != nil {
 		_ = c.Error(err)
 		return
 	}
@@ -164,10 +182,10 @@ func (oc *OidcController) createTokensHandler(c *gin.Context) {

 	// Client id and secret can also be passed over the Authorization header
 	if input.ClientID == "" && input.ClientSecret == "" {
-		input.ClientID, input.ClientSecret, _ = c.Request.BasicAuth()
+		input.ClientID, input.ClientSecret, _ = utils.OAuthClientBasicAuth(c.Request)
 	}

-	tokens, err := oc.oidcService.CreateTokens(c.Request.Context(), input)
+	tokens, err := oc.createTokens(c.Request.Context(), input)

 	switch {
 	case errors.Is(err, &common.OidcAuthorizationPendingError{}):
@@ -322,13 +340,15 @@ func (oc *OidcController) introspectTokenHandler(c *gin.Context) {
 		creds service.ClientAuthCredentials
 		ok    bool
 	)
-	creds.ClientID, creds.ClientSecret, ok = c.Request.BasicAuth()
+	creds.ClientID, creds.ClientSecret, ok = utils.OAuthClientBasicAuth(c.Request)
 	if !ok {
-		// If there's no basic auth, check if we have a bearer token
+		// If there's no basic auth, check if we have a bearer token (used as client assertion)
 		bearer, ok := utils.BearerAuth(c.Request)
 		if ok {
 			creds.ClientAssertionType = service.ClientAssertionTypeJWTBearer
 			creds.ClientAssertion = bearer
+			// When using client assertions, client_id can be passed as a form field
+			creds.ClientID = input.ClientID
 		}
 	}

@@ -651,15 +671,20 @@ func (oc *OidcController) updateAllowedUserGroupsHandler(c *gin.Context) {
 }

 func (oc *OidcController) deviceAuthorizationHandler(c *gin.Context) {
+	// Per RFC 8628 (OAuth 2.0 Device Authorization Grant), parameters for the device authorization request MUST be sent in the body of the POST request
+	// Gin's "ShouldBind" by default reads from the query string too, so we need to reset all query string args before invoking ShouldBind
+	c.Request.URL.RawQuery = ""
+
 	var input dto.OidcDeviceAuthorizationRequestDto
-	if err := c.ShouldBind(&input); err != nil {
+	err := c.ShouldBind(&input)
+	if err != nil {
 		_ = c.Error(err)
 		return
 	}

 	// Client id and secret can also be passed over the Authorization header
 	if input.ClientID == "" && input.ClientSecret == "" {
-		input.ClientID, input.ClientSecret, _ = c.Request.BasicAuth()
+		input.ClientID, input.ClientSecret, _ = utils.OAuthClientBasicAuth(c.Request)
 	}

 	response, err := oc.oidcService.CreateDeviceAuthorization(c.Request.Context(), input)
--- a/backend/internal/controller/oidc_controller_test.go
+++ b/backend/internal/controller/oidc_controller_test.go
@@ -0,0 +1,227 @@
+package controller
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/pocket-id/pocket-id/backend/internal/common"
+	"github.com/pocket-id/pocket-id/backend/internal/dto"
+	"github.com/pocket-id/pocket-id/backend/internal/service"
+)
+
+func TestCreateTokensHandler(t *testing.T) {
+	createTestContext := func(t *testing.T, rawURL string, form url.Values, authHeader string, noCT bool) (*gin.Context, *httptest.ResponseRecorder) {
+		t.Helper()
+
+		mode := gin.Mode()
+		gin.SetMode(gin.TestMode)
+		t.Cleanup(func() { gin.SetMode(mode) })
+
+		recorder := httptest.NewRecorder()
+		c, _ := gin.CreateTestContext(recorder)
+
+		req, err := http.NewRequestWithContext(t.Context(), http.MethodPost, rawURL, strings.NewReader(form.Encode()))
+		require.NoError(t, err)
+
+		if !noCT {
+			req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+		}
+		if authHeader != "" {
+			req.Header.Set("Authorization", authHeader)
+		}
+
+		c.Request = req
+		return c, recorder
+	}
+
+	t.Run("Ignores Query String Parameters For Binding", func(t *testing.T) {
+		oc := &OidcController{}
+
+		c, _ := createTestContext(
+			t,
+			"http://example.com/oidc/token?grant_type=refresh_token&refresh_token=query-value",
+			url.Values{},
+			"",
+			false,
+		)
+
+		oc.createTokensHandler(c)
+
+		require.Len(t, c.Errors, 1)
+		assert.Contains(t, c.Errors[0].Err.Error(), "GrantType")
+	})
+
+	t.Run("Missing Authorization Code", func(t *testing.T) {
+		oc := &OidcController{}
+
+		c, _ := createTestContext(
+			t,
+			"http://example.com/oidc/token",
+			url.Values{
+				"grant_type": {service.GrantTypeAuthorizationCode},
+			},
+			"",
+			false,
+		)
+
+		oc.createTokensHandler(c)
+
+		require.Len(t, c.Errors, 1)
+		var missingCodeErr *common.OidcMissingAuthorizationCodeError
+		require.ErrorAs(t, c.Errors[0].Err, &missingCodeErr)
+	})
+
+	t.Run("Missing Refresh Token", func(t *testing.T) {
+		oc := &OidcController{}
+
+		c, _ := createTestContext(
+			t,
+			"http://example.com/oidc/token",
+			url.Values{
+				"grant_type": {service.GrantTypeRefreshToken},
+			},
+			"",
+			false,
+		)
+
+		oc.createTokensHandler(c)
+
+		require.Len(t, c.Errors, 1)
+		var missingRefreshErr *common.OidcMissingRefreshTokenError
+		require.ErrorAs(t, c.Errors[0].Err, &missingRefreshErr)
+	})
+
+	t.Run("Uses Basic Auth Credentials When Body Credentials Missing", func(t *testing.T) {
+		var capturedInput dto.OidcCreateTokensDto
+		oc := &OidcController{
+			createTokens: func(_ context.Context, input dto.OidcCreateTokensDto) (service.CreatedTokens, error) {
+				capturedInput = input
+				return service.CreatedTokens{
+					AccessToken:  "access-token",
+					IdToken:      "id-token",
+					RefreshToken: "refresh-token",
+					ExpiresIn:    2 * time.Minute,
+				}, nil
+			},
+		}
+
+		basicAuth := "Basic " + base64.StdEncoding.EncodeToString([]byte("client-id:client-secret"))
+		c, recorder := createTestContext(
+			t,
+			"http://example.com/oidc/token",
+			url.Values{
+				"grant_type":    {service.GrantTypeRefreshToken},
+				"refresh_token": {"input-refresh-token"},
+			},
+			basicAuth,
+			false,
+		)
+
+		oc.createTokensHandler(c)
+
+		require.Empty(t, c.Errors)
+		assert.Equal(t, "client-id", capturedInput.ClientID)
+		assert.Equal(t, "client-secret", capturedInput.ClientSecret)
+		assert.Equal(t, "input-refresh-token", capturedInput.RefreshToken)
+
+		require.Equal(t, http.StatusOK, recorder.Code)
+		var response dto.OidcTokenResponseDto
+		require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &response))
+		assert.Equal(t, "access-token", response.AccessToken)
+		assert.Equal(t, "Bearer", response.TokenType)
+		assert.Equal(t, "id-token", response.IdToken)
+		assert.Equal(t, "refresh-token", response.RefreshToken)
+		assert.Equal(t, 120, response.ExpiresIn)
+	})
+
+	t.Run("Maps Authorization Pending Error", func(t *testing.T) {
+		oc := &OidcController{
+			createTokens: func(context.Context, dto.OidcCreateTokensDto) (service.CreatedTokens, error) {
+				return service.CreatedTokens{}, &common.OidcAuthorizationPendingError{}
+			},
+		}
+
+		c, recorder := createTestContext(
+			t,
+			"http://example.com/oidc/token",
+			url.Values{
+				"grant_type":    {service.GrantTypeRefreshToken},
+				"refresh_token": {"input-refresh-token"},
+			},
+			"",
+			false,
+		)
+
+		oc.createTokensHandler(c)
+
+		require.Empty(t, c.Errors)
+		require.Equal(t, http.StatusBadRequest, recorder.Code)
+		var response map[string]string
+		require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &response))
+		assert.Equal(t, "authorization_pending", response["error"])
+	})
+
+	t.Run("Maps Slow Down Error", func(t *testing.T) {
+		oc := &OidcController{
+			createTokens: func(context.Context, dto.OidcCreateTokensDto) (service.CreatedTokens, error) {
+				return service.CreatedTokens{}, &common.OidcSlowDownError{}
+			},
+		}
+
+		c, recorder := createTestContext(
+			t,
+			"http://example.com/oidc/token",
+			url.Values{
+				"grant_type":    {service.GrantTypeRefreshToken},
+				"refresh_token": {"input-refresh-token"},
+			},
+			"",
+			false,
+		)
+
+		oc.createTokensHandler(c)
+
+		require.Empty(t, c.Errors)
+		require.Equal(t, http.StatusBadRequest, recorder.Code)
+		var response map[string]string
+		require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &response))
+		assert.Equal(t, "slow_down", response["error"])
+	})
+
+	t.Run("Returns Generic Service Error In Context", func(t *testing.T) {
+		expectedErr := errors.New("boom")
+		oc := &OidcController{
+			createTokens: func(context.Context, dto.OidcCreateTokensDto) (service.CreatedTokens, error) {
+				return service.CreatedTokens{}, expectedErr
+			},
+		}
+
+		c, _ := createTestContext(
+			t,
+			"http://example.com/oidc/token",
+			url.Values{
+				"grant_type":    {service.GrantTypeRefreshToken},
+				"refresh_token": {"input-refresh-token"},
+			},
+			"",
+			false,
+		)
+
+		oc.createTokensHandler(c)
+
+		require.Len(t, c.Errors, 1)
+		assert.ErrorIs(t, c.Errors[0].Err, expectedErr)
+	})
+}
--- a/backend/internal/controller/user_controller.go
+++ b/backend/internal/controller/user_controller.go
@@ -4,6 +4,7 @@ import (
 	"net/http"
 	"time"

+	"github.com/pocket-id/pocket-id/backend/internal/common"
 	"github.com/pocket-id/pocket-id/backend/internal/utils/cookie"

 	"github.com/gin-gonic/gin"
@@ -14,19 +15,17 @@ import (
 	"golang.org/x/time/rate"
 )

-const (
-	defaultOneTimeAccessTokenDuration = 15 * time.Minute
-	defaultSignupTokenDuration        = time.Hour
-)
+const defaultOneTimeAccessTokenDuration = 15 * time.Minute

 // NewUserController creates a new controller for user management endpoints
 // @Summary User management controller
 // @Description Initializes all user-related API endpoints
 // @Tags Users
-func NewUserController(group *gin.RouterGroup, authMiddleware *middleware.AuthMiddleware, rateLimitMiddleware *middleware.RateLimitMiddleware, userService *service.UserService, appConfigService *service.AppConfigService) {
+func NewUserController(group *gin.RouterGroup, authMiddleware *middleware.AuthMiddleware, rateLimitMiddleware *middleware.RateLimitMiddleware, userService *service.UserService, oneTimeAccessService *service.OneTimeAccessService, appConfigService *service.AppConfigService) {
 	uc := UserController{
-		userService:      userService,
-		appConfigService: appConfigService,
+		userService:          userService,
+		oneTimeAccessService: oneTimeAccessService,
+		appConfigService:     appConfigService,
 	}

 	group.GET("/users", authMiddleware.Add(), uc.listUsersHandler)
@@ -54,17 +53,14 @@ func NewUserController(group *gin.RouterGroup, authMiddleware *middleware.AuthMi
 	group.DELETE("/users/:id/profile-picture", authMiddleware.Add(), uc.resetUserProfilePictureHandler)
 	group.DELETE("/users/me/profile-picture", authMiddleware.WithAdminNotRequired().Add(), uc.resetCurrentUserProfilePictureHandler)

-	group.POST("/signup-tokens", authMiddleware.Add(), uc.createSignupTokenHandler)
-	group.GET("/signup-tokens", authMiddleware.Add(), uc.listSignupTokensHandler)
-	group.DELETE("/signup-tokens/:id", authMiddleware.Add(), uc.deleteSignupTokenHandler)
-	group.POST("/signup", rateLimitMiddleware.Add(rate.Every(1*time.Minute), 10), uc.signupHandler)
-	group.POST("/signup/setup", uc.signUpInitialAdmin)
-
+	group.POST("/users/me/send-email-verification", rateLimitMiddleware.Add(rate.Every(10*time.Minute), 3), authMiddleware.WithAdminNotRequired().Add(), uc.sendEmailVerificationHandler)
+	group.POST("/users/me/verify-email", rateLimitMiddleware.Add(rate.Every(10*time.Second), 5), authMiddleware.WithAdminNotRequired().Add(), uc.verifyEmailHandler)
 }

 type UserController struct {
-	userService      *service.UserService
-	appConfigService *service.AppConfigService
+	userService          *service.UserService
+	oneTimeAccessService *service.OneTimeAccessService
+	appConfigService     *service.AppConfigService
 }

 // getUserGroupsHandler godoc
@@ -327,22 +323,34 @@ func (uc *UserController) updateCurrentUserProfilePictureHandler(c *gin.Context)

 func (uc *UserController) createOneTimeAccessTokenHandler(c *gin.Context, own bool) {
 	var input dto.OneTimeAccessTokenCreateDto
-	if err := c.ShouldBindJSON(&input); err != nil {
+	err := c.ShouldBindJSON(&input)
+	if err != nil {
 		_ = c.Error(err)
 		return
 	}

-	var ttl time.Duration
+	var (
+		userID string
+		ttl    time.Duration
+	)
 	if own {
-		input.UserID = c.GetString("userID")
+		// Get user ID from context and force the default TTL
+		userID = c.GetString("userID")
 		ttl = defaultOneTimeAccessTokenDuration
 	} else {
+		// Get user ID from URL parameter, and optional TTL from body
+		userID = c.Param("id")
 		ttl = input.TTL.Duration
 		if ttl <= 0 {
 			ttl = defaultOneTimeAccessTokenDuration
 		}
 	}
-	token, err := uc.userService.CreateOneTimeAccessToken(c.Request.Context(), input.UserID, ttl)
+	if userID == "" {
+		_ = c.Error(&common.UserIdNotProvidedError{})
+		return
+	}
+
+	token, err := uc.oneTimeAccessService.CreateOneTimeAccessToken(c.Request.Context(), userID, ttl)
 	if err != nil {
 		_ = c.Error(err)
 		return
@@ -391,7 +399,7 @@ func (uc *UserController) RequestOneTimeAccessEmailAsUnauthenticatedUserHandler(
 		return
 	}

-	deviceToken, err := uc.userService.RequestOneTimeAccessEmailAsUnauthenticatedUser(c.Request.Context(), input.Email, input.RedirectPath)
+	deviceToken, err := uc.oneTimeAccessService.RequestOneTimeAccessEmailAsUnauthenticatedUser(c.Request.Context(), input.Email, input.RedirectPath)
 	if err != nil {
 		_ = c.Error(err)
 		return
@@ -424,7 +432,7 @@ func (uc *UserController) RequestOneTimeAccessEmailAsAdminHandler(c *gin.Context
 	if ttl <= 0 {
 		ttl = defaultOneTimeAccessTokenDuration
 	}
-	err := uc.userService.RequestOneTimeAccessEmailAsAdmin(c.Request.Context(), userID, ttl)
+	err := uc.oneTimeAccessService.RequestOneTimeAccessEmailAsAdmin(c.Request.Context(), userID, ttl)
 	if err != nil {
 		_ = c.Error(err)
 		return
@@ -442,41 +450,7 @@ func (uc *UserController) RequestOneTimeAccessEmailAsAdminHandler(c *gin.Context
 // @Router /api/one-time-access-token/{token} [post]
 func (uc *UserController) exchangeOneTimeAccessTokenHandler(c *gin.Context) {
 	deviceToken, _ := c.Cookie(cookie.DeviceTokenCookieName)
-	user, token, err := uc.userService.ExchangeOneTimeAccessToken(c.Request.Context(), c.Param("token"), deviceToken, c.ClientIP(), c.Request.UserAgent())
-	if err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	var userDto dto.UserDto
-	if err := dto.MapStruct(user, &userDto); err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	maxAge := int(uc.appConfigService.GetDbConfig().SessionDuration.AsDurationMinutes().Seconds())
-	cookie.AddAccessTokenCookie(c, maxAge, token)
-
-	c.JSON(http.StatusOK, userDto)
-}
-
-// signUpInitialAdmin godoc
-// @Summary Sign up initial admin user
-// @Description Sign up and generate setup access token for initial admin user
-// @Tags Users
-// @Accept json
-// @Produce json
-// @Param body body dto.SignUpDto true "User information"
-// @Success 200 {object} dto.UserDto
-// @Router /api/signup/setup [post]
-func (uc *UserController) signUpInitialAdmin(c *gin.Context) {
-	var input dto.SignUpDto
-	if err := dto.ShouldBindWithNormalizedJSON(c, &input); err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	user, token, err := uc.userService.SignUpInitialAdmin(c.Request.Context(), input)
+	user, token, err := uc.oneTimeAccessService.ExchangeOneTimeAccessToken(c.Request.Context(), c.Param("token"), deviceToken, c.ClientIP(), c.Request.UserAgent())
 	if err != nil {
 		_ = c.Error(err)
 		return
@@ -524,130 +498,6 @@ func (uc *UserController) updateUserGroups(c *gin.Context) {
 	c.JSON(http.StatusOK, userDto)
 }

-// createSignupTokenHandler godoc
-// @Summary Create signup token
-// @Description Create a new signup token that allows user registration
-// @Tags Users
-// @Accept json
-// @Produce json
-// @Param token body dto.SignupTokenCreateDto true "Signup token information"
-// @Success 201 {object} dto.SignupTokenDto
-// @Router /api/signup-tokens [post]
-func (uc *UserController) createSignupTokenHandler(c *gin.Context) {
-	var input dto.SignupTokenCreateDto
-	if err := c.ShouldBindJSON(&input); err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	ttl := input.TTL.Duration
-	if ttl <= 0 {
-		ttl = defaultSignupTokenDuration
-	}
-
-	signupToken, err := uc.userService.CreateSignupToken(c.Request.Context(), ttl, input.UsageLimit, input.UserGroupIDs)
-	if err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	var tokenDto dto.SignupTokenDto
-	err = dto.MapStruct(signupToken, &tokenDto)
-	if err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	c.JSON(http.StatusCreated, tokenDto)
-}
-
-// listSignupTokensHandler godoc
-// @Summary List signup tokens
-// @Description Get a paginated list of signup tokens
-// @Tags Users
-// @Param pagination[page] query int false "Page number for pagination" default(1)
-// @Param pagination[limit] query int false "Number of items per page" default(20)
-// @Param sort[column] query string false "Column to sort by"
-// @Param sort[direction] query string false "Sort direction (asc or desc)" default("asc")
-// @Success 200 {object} dto.Paginated[dto.SignupTokenDto]
-// @Router /api/signup-tokens [get]
-func (uc *UserController) listSignupTokensHandler(c *gin.Context) {
-	listRequestOptions := utils.ParseListRequestOptions(c)
-
-	tokens, pagination, err := uc.userService.ListSignupTokens(c.Request.Context(), listRequestOptions)
-	if err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	var tokensDto []dto.SignupTokenDto
-	if err := dto.MapStructList(tokens, &tokensDto); err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	c.JSON(http.StatusOK, dto.Paginated[dto.SignupTokenDto]{
-		Data:       tokensDto,
-		Pagination: pagination,
-	})
-}
-
-// deleteSignupTokenHandler godoc
-// @Summary Delete signup token
-// @Description Delete a signup token by ID
-// @Tags Users
-// @Param id path string true "Token ID"
-// @Success 204 "No Content"
-// @Router /api/signup-tokens/{id} [delete]
-func (uc *UserController) deleteSignupTokenHandler(c *gin.Context) {
-	tokenID := c.Param("id")
-
-	err := uc.userService.DeleteSignupToken(c.Request.Context(), tokenID)
-	if err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	c.Status(http.StatusNoContent)
-}
-
-// signupWithTokenHandler godoc
-// @Summary Sign up
-// @Description Create a new user account
-// @Tags Users
-// @Accept json
-// @Produce json
-// @Param user body dto.SignUpDto true "User information"
-// @Success 201 {object} dto.SignUpDto
-// @Router /api/signup [post]
-func (uc *UserController) signupHandler(c *gin.Context) {
-	var input dto.SignUpDto
-	if err := dto.ShouldBindWithNormalizedJSON(c, &input); err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	ipAddress := c.ClientIP()
-	userAgent := c.GetHeader("User-Agent")
-
-	user, accessToken, err := uc.userService.SignUp(c.Request.Context(), input, ipAddress, userAgent)
-	if err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	maxAge := int(uc.appConfigService.GetDbConfig().SessionDuration.AsDurationMinutes().Seconds())
-	cookie.AddAccessTokenCookie(c, maxAge, accessToken)
-
-	var userDto dto.UserDto
-	if err := dto.MapStruct(user, &userDto); err != nil {
-		_ = c.Error(err)
-		return
-	}
-
-	c.JSON(http.StatusCreated, userDto)
-}
-
 // updateUser is an internal helper method, not exposed as an API endpoint
 func (uc *UserController) updateUser(c *gin.Context, updateOwnUser bool) {
 	var input dto.UserCreateDto
@@ -714,3 +564,44 @@ func (uc *UserController) resetCurrentUserProfilePictureHandler(c *gin.Context)

 	c.Status(http.StatusNoContent)
 }
+
+// sendEmailVerificationHandler godoc
+// @Summary Send email verification
+// @Description Send an email verification to the currently authenticated user
+// @Tags Users
+// @Produce json
+// @Success 204 "No Content"
+// @Router /api/users/me/send-email-verification [post]
+func (uc *UserController) sendEmailVerificationHandler(c *gin.Context) {
+	userID := c.GetString("userID")
+
+	if err := uc.userService.SendEmailVerification(c.Request.Context(), userID); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	c.Status(http.StatusNoContent)
+}
+
+// verifyEmailHandler godoc
+// @Summary Verify email
+// @Description Verify the currently authenticated user's email using a verification token
+// @Tags Users
+// @Param body body dto.EmailVerificationDto true "Email verification token"
+// @Success 204 "No Content"
+// @Router /api/users/me/verify-email [post]
+func (uc *UserController) verifyEmailHandler(c *gin.Context) {
+	var input dto.EmailVerificationDto
+	if err := dto.ShouldBindWithNormalizedJSON(c, &input); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	userID := c.GetString("userID")
+	if err := uc.userService.VerifyEmail(c.Request.Context(), userID, input.Token); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	c.Status(http.StatusNoContent)
+}
--- a/backend/internal/controller/user_signup_controller.go
+++ b/backend/internal/controller/user_signup_controller.go
@@ -0,0 +1,198 @@
+package controller
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/pocket-id/pocket-id/backend/internal/utils/cookie"
+
+	"github.com/gin-gonic/gin"
+	"github.com/pocket-id/pocket-id/backend/internal/dto"
+	"github.com/pocket-id/pocket-id/backend/internal/middleware"
+	"github.com/pocket-id/pocket-id/backend/internal/service"
+	"github.com/pocket-id/pocket-id/backend/internal/utils"
+	"golang.org/x/time/rate"
+)
+
+const defaultSignupTokenDuration = time.Hour
+
+// NewUserSignupController creates a new controller for user signup and signup token management
+// @Summary User signup and signup token management controller
+// @Description Initializes all user signup-related API endpoints
+// @Tags Users
+func NewUserSignupController(group *gin.RouterGroup, authMiddleware *middleware.AuthMiddleware, rateLimitMiddleware *middleware.RateLimitMiddleware, userSignUpService *service.UserSignUpService, appConfigService *service.AppConfigService) {
+	usc := UserSignupController{
+		userSignUpService: userSignUpService,
+		appConfigService:  appConfigService,
+	}
+
+	group.POST("/signup-tokens", authMiddleware.Add(), usc.createSignupTokenHandler)
+	group.GET("/signup-tokens", authMiddleware.Add(), usc.listSignupTokensHandler)
+	group.DELETE("/signup-tokens/:id", authMiddleware.Add(), usc.deleteSignupTokenHandler)
+	group.POST("/signup", rateLimitMiddleware.Add(rate.Every(1*time.Minute), 10), usc.signupHandler)
+	group.POST("/signup/setup", usc.signUpInitialAdmin)
+
+}
+
+type UserSignupController struct {
+	userSignUpService *service.UserSignUpService
+	appConfigService  *service.AppConfigService
+}
+
+// signUpInitialAdmin godoc
+// @Summary Sign up initial admin user
+// @Description Sign up and generate setup access token for initial admin user
+// @Tags Users
+// @Accept json
+// @Produce json
+// @Param body body dto.SignUpDto true "User information"
+// @Success 200 {object} dto.UserDto
+// @Router /api/signup/setup [post]
+func (usc *UserSignupController) signUpInitialAdmin(c *gin.Context) {
+	var input dto.SignUpDto
+	if err := dto.ShouldBindWithNormalizedJSON(c, &input); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	user, token, err := usc.userSignUpService.SignUpInitialAdmin(c.Request.Context(), input)
+	if err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	var userDto dto.UserDto
+	if err := dto.MapStruct(user, &userDto); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	maxAge := int(usc.appConfigService.GetDbConfig().SessionDuration.AsDurationMinutes().Seconds())
+	cookie.AddAccessTokenCookie(c, maxAge, token)
+
+	c.JSON(http.StatusOK, userDto)
+}
+
+// createSignupTokenHandler godoc
+// @Summary Create signup token
+// @Description Create a new signup token that allows user registration
+// @Tags Users
+// @Accept json
+// @Produce json
+// @Param token body dto.SignupTokenCreateDto true "Signup token information"
+// @Success 201 {object} dto.SignupTokenDto
+// @Router /api/signup-tokens [post]
+func (usc *UserSignupController) createSignupTokenHandler(c *gin.Context) {
+	var input dto.SignupTokenCreateDto
+	if err := c.ShouldBindJSON(&input); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	ttl := input.TTL.Duration
+	if ttl <= 0 {
+		ttl = defaultSignupTokenDuration
+	}
+
+	signupToken, err := usc.userSignUpService.CreateSignupToken(c.Request.Context(), ttl, input.UsageLimit, input.UserGroupIDs)
+	if err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	var tokenDto dto.SignupTokenDto
+	err = dto.MapStruct(signupToken, &tokenDto)
+	if err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	c.JSON(http.StatusCreated, tokenDto)
+}
+
+// listSignupTokensHandler godoc
+// @Summary List signup tokens
+// @Description Get a paginated list of signup tokens
+// @Tags Users
+// @Param pagination[page] query int false "Page number for pagination" default(1)
+// @Param pagination[limit] query int false "Number of items per page" default(20)
+// @Param sort[column] query string false "Column to sort by"
+// @Param sort[direction] query string false "Sort direction (asc or desc)" default("asc")
+// @Success 200 {object} dto.Paginated[dto.SignupTokenDto]
+// @Router /api/signup-tokens [get]
+func (usc *UserSignupController) listSignupTokensHandler(c *gin.Context) {
+	listRequestOptions := utils.ParseListRequestOptions(c)
+
+	tokens, pagination, err := usc.userSignUpService.ListSignupTokens(c.Request.Context(), listRequestOptions)
+	if err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	var tokensDto []dto.SignupTokenDto
+	if err := dto.MapStructList(tokens, &tokensDto); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	c.JSON(http.StatusOK, dto.Paginated[dto.SignupTokenDto]{
+		Data:       tokensDto,
+		Pagination: pagination,
+	})
+}
+
+// deleteSignupTokenHandler godoc
+// @Summary Delete signup token
+// @Description Delete a signup token by ID
+// @Tags Users
+// @Param id path string true "Token ID"
+// @Success 204 "No Content"
+// @Router /api/signup-tokens/{id} [delete]
+func (usc *UserSignupController) deleteSignupTokenHandler(c *gin.Context) {
+	tokenID := c.Param("id")
+
+	err := usc.userSignUpService.DeleteSignupToken(c.Request.Context(), tokenID)
+	if err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	c.Status(http.StatusNoContent)
+}
+
+// signupWithTokenHandler godoc
+// @Summary Sign up
+// @Description Create a new user account
+// @Tags Users
+// @Accept json
+// @Produce json
+// @Param user body dto.SignUpDto true "User information"
+// @Success 201 {object} dto.SignUpDto
+// @Router /api/signup [post]
+func (usc *UserSignupController) signupHandler(c *gin.Context) {
+	var input dto.SignUpDto
+	if err := dto.ShouldBindWithNormalizedJSON(c, &input); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	ipAddress := c.ClientIP()
+	userAgent := c.GetHeader("User-Agent")
+
+	user, accessToken, err := usc.userSignUpService.SignUp(c.Request.Context(), input, ipAddress, userAgent)
+	if err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	maxAge := int(usc.appConfigService.GetDbConfig().SessionDuration.AsDurationMinutes().Seconds())
+	cookie.AddAccessTokenCookie(c, maxAge, accessToken)
+
+	var userDto dto.UserDto
+	if err := dto.MapStruct(user, &userDto); err != nil {
+		_ = c.Error(err)
+		return
+	}
+
+	c.JSON(http.StatusCreated, userDto)
+}
--- a/backend/internal/controller/version_controller.go
+++ b/backend/internal/controller/version_controller.go
@@ -5,14 +5,17 @@ import (
 	"time"

 	"github.com/gin-gonic/gin"
+	"github.com/pocket-id/pocket-id/backend/internal/common"
+	"github.com/pocket-id/pocket-id/backend/internal/middleware"
 	"github.com/pocket-id/pocket-id/backend/internal/service"
 	"github.com/pocket-id/pocket-id/backend/internal/utils"
 )

 // NewVersionController registers version-related routes.
-func NewVersionController(group *gin.RouterGroup, versionService *service.VersionService) {
+func NewVersionController(group *gin.RouterGroup, authMiddleware *middleware.AuthMiddleware, versionService *service.VersionService) {
 	vc := &VersionController{versionService: versionService}
 	group.GET("/version/latest", vc.getLatestVersionHandler)
+	group.GET("/version/current", authMiddleware.WithAdminNotRequired().Add(), vc.getCurrentVersionHandler)
 }

 type VersionController struct {
@@ -38,3 +41,16 @@ func (vc *VersionController) getLatestVersionHandler(c *gin.Context) {
 		"latestVersion": tag,
 	})
 }
+
+// getCurrentVersionHandler godoc
+// @Summary Get current deployed version of Pocket ID
+// @Tags Version
+// @Produce json
+// @Success 200 {object} map[string]string "Current version information"
+// @Router /api/version/current [get]
+func (vc *VersionController) getCurrentVersionHandler(c *gin.Context) {
+
+	c.JSON(http.StatusOK, gin.H{
+		"currentVersion": common.Version,
+	})
+}
--- a/backend/internal/controller/well_known_controller.go
+++ b/backend/internal/controller/well_known_controller.go
@@ -91,6 +91,7 @@ func (wkc *WellKnownController) computeOIDCConfiguration() ([]byte, error) {
 		"id_token_signing_alg_values_supported":          []string{alg.String()},
 		"authorization_response_iss_parameter_supported": true,
 		"code_challenge_methods_supported":               []string{"plain", "S256"},
+		"token_endpoint_auth_methods_supported":          []string{"client_secret_basic", "client_secret_post", "none"},
 	}
 	return json.Marshal(config)
 }
--- a/backend/internal/dto/api_key_dto.go
+++ b/backend/internal/dto/api_key_dto.go
@@ -10,6 +10,10 @@ type ApiKeyCreateDto struct {
 	ExpiresAt   datatype.DateTime `json:"expiresAt" binding:"required"`
 }

+type ApiKeyRenewDto struct {
+	ExpiresAt datatype.DateTime `json:"expiresAt" binding:"required"`
+}
+
 type ApiKeyDto struct {
 	ID                  string             `json:"id"`
 	Name                string             `json:"name"`
--- a/backend/internal/dto/app_config_dto.go
+++ b/backend/internal/dto/app_config_dto.go
@@ -14,6 +14,7 @@ type AppConfigVariableDto struct {
 type AppConfigUpdateDto struct {
 	AppName                                    string `json:"appName" binding:"required,min=1,max=30" unorm:"nfc"`
 	SessionDuration                            string `json:"sessionDuration" binding:"required"`
+	HomePageURL                                string `json:"homePageUrl" binding:"required"`
 	EmailsVerified                             string `json:"emailsVerified" binding:"required"`
 	DisableAnimations                          string `json:"disableAnimations" binding:"required"`
 	AllowOwnAccountEdit                        string `json:"allowOwnAccountEdit" binding:"required"`
@@ -53,4 +54,5 @@ type AppConfigUpdateDto struct {
 	EmailOneTimeAccessAsUnauthenticatedEnabled string `json:"emailOneTimeAccessAsUnauthenticatedEnabled" binding:"required"`
 	EmailLoginNotificationEnabled              string `json:"emailLoginNotificationEnabled" binding:"required"`
 	EmailApiKeyExpirationEnabled               string `json:"emailApiKeyExpirationEnabled" binding:"required"`
+	EmailVerificationEnabled                   string `json:"emailVerificationEnabled" binding:"required"`
 }
--- a/backend/internal/dto/dto_mapper_test.go
+++ b/backend/internal/dto/dto_mapper_test.go
@@ -9,7 +9,6 @@ import (

 	"github.com/pocket-id/pocket-id/backend/internal/model"
 	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
-	"github.com/pocket-id/pocket-id/backend/internal/utils"
 )

 type sourceStruct struct {
@@ -60,11 +59,11 @@ type embeddedStruct struct {
 func TestMapStruct(t *testing.T) {
 	src := sourceStruct{
 		AString:            "abcd",
-		AStringPtr:         utils.Ptr("xyz"),
+		AStringPtr:         new("xyz"),
 		ABool:              true,
-		ABoolPtr:           utils.Ptr(false),
+		ABoolPtr:           new(false),
 		ACustomDateTime:    datatype.DateTime(time.Date(2025, 1, 2, 3, 4, 5, 0, time.UTC)),
-		ACustomDateTimePtr: utils.Ptr(datatype.DateTime(time.Date(2024, 1, 2, 3, 4, 5, 0, time.UTC))),
+		ACustomDateTimePtr: new(datatype.DateTime(time.Date(2024, 1, 2, 3, 4, 5, 0, time.UTC))),
 		ANilStringPtr:      nil,
 		ASlice:             []string{"a", "b", "c"},
 		AMap: map[string]int{
@@ -80,8 +79,8 @@ func TestMapStruct(t *testing.T) {
 			Bar: 111,
 		},

-		StringPtrToString:      utils.Ptr("foobar"),
-		EmptyStringPtrToString: utils.Ptr(""),
+		StringPtrToString:      new("foobar"),
+		EmptyStringPtrToString: new(""),
 		NilStringPtrToString:   nil,
 		IntToInt64:             99,
 		AuditLogEventToString:  model.AuditLogEventAccountCreated,
@@ -118,11 +117,11 @@ func TestMapStructList(t *testing.T) {
 	sources := []sourceStruct{
 		{
 			AString:            "first",
-			AStringPtr:         utils.Ptr("one"),
+			AStringPtr:         new("one"),
 			ABool:              true,
-			ABoolPtr:           utils.Ptr(false),
+			ABoolPtr:           new(false),
 			ACustomDateTime:    datatype.DateTime(time.Date(2025, 1, 2, 3, 4, 5, 0, time.UTC)),
-			ACustomDateTimePtr: utils.Ptr(datatype.DateTime(time.Date(2024, 1, 2, 3, 4, 5, 0, time.UTC))),
+			ACustomDateTimePtr: new(datatype.DateTime(time.Date(2024, 1, 2, 3, 4, 5, 0, time.UTC))),
 			ASlice:             []string{"a", "b"},
 			AMap: map[string]int{
 				"a": 1,
@@ -136,11 +135,11 @@ func TestMapStructList(t *testing.T) {
 		},
 		{
 			AString:            "second",
-			AStringPtr:         utils.Ptr("two"),
+			AStringPtr:         new("two"),
 			ABool:              false,
-			ABoolPtr:           utils.Ptr(true),
+			ABoolPtr:           new(true),
 			ACustomDateTime:    datatype.DateTime(time.Date(2026, 6, 7, 8, 9, 10, 0, time.UTC)),
-			ACustomDateTimePtr: utils.Ptr(datatype.DateTime(time.Date(2023, 6, 7, 8, 9, 10, 0, time.UTC))),
+			ACustomDateTimePtr: new(datatype.DateTime(time.Date(2023, 6, 7, 8, 9, 10, 0, time.UTC))),
 			ASlice:             []string{"c", "d", "e"},
 			AMap: map[string]int{
 				"c": 3,
--- a/backend/internal/dto/dto_normalize.go
+++ b/backend/internal/dto/dto_normalize.go
@@ -12,7 +12,7 @@ import (
 // Normalize iterates through an object and performs Unicode normalization on all string fields with the `unorm` tag.
 func Normalize(obj any) {
 	v := reflect.ValueOf(obj)
-	if v.Kind() != reflect.Ptr || v.IsNil() {
+	if v.Kind() != reflect.Pointer || v.IsNil() {
 		return
 	}
 	v = v.Elem()
@@ -21,7 +21,7 @@ func Normalize(obj any) {
 	if v.Kind() == reflect.Slice {
 		for i := 0; i < v.Len(); i++ {
 			elem := v.Index(i)
-			if elem.Kind() == reflect.Ptr && !elem.IsNil() && elem.Elem().Kind() == reflect.Struct {
+			if elem.Kind() == reflect.Pointer && !elem.IsNil() && elem.Elem().Kind() == reflect.Struct {
 				Normalize(elem.Interface())
 			} else if elem.Kind() == reflect.Struct && elem.CanAddr() {
 				Normalize(elem.Addr().Interface())
--- a/backend/internal/dto/oidc_dto.go
+++ b/backend/internal/dto/oidc_dto.go
@@ -33,8 +33,8 @@ type OidcClientWithAllowedGroupsCountDto struct {

 type OidcClientUpdateDto struct {
 	Name                     string                   `json:"name" binding:"required,max=50" unorm:"nfc"`
-	CallbackURLs             []string                 `json:"callbackURLs" binding:"omitempty,dive,callback_url"`
-	LogoutCallbackURLs       []string                 `json:"logoutCallbackURLs" binding:"omitempty,dive,callback_url"`
+	CallbackURLs             []string                 `json:"callbackURLs" binding:"omitempty,dive,callback_url_pattern"`
+	LogoutCallbackURLs       []string                 `json:"logoutCallbackURLs" binding:"omitempty,dive,callback_url_pattern"`
 	IsPublic                 bool                     `json:"isPublic"`
 	PkceEnabled              bool                     `json:"pkceEnabled"`
 	RequiresReauthentication bool                     `json:"requiresReauthentication"`
@@ -66,7 +66,7 @@ type OidcClientFederatedIdentityDto struct {
 type AuthorizeOidcClientRequestDto struct {
 	ClientID              string `json:"clientID" binding:"required"`
 	Scope                 string `json:"scope" binding:"required"`
-	CallbackURL           string `json:"callbackURL"`
+	CallbackURL           string `json:"callbackURL" binding:"omitempty,callback_url"`
 	Nonce                 string `json:"nonce"`
 	CodeChallenge         string `json:"codeChallenge"`
 	CodeChallengeMethod   string `json:"codeChallengeMethod"`
@@ -98,7 +98,8 @@ type OidcCreateTokensDto struct {
 }

 type OidcIntrospectDto struct {
-	Token string `form:"token" binding:"required"`
+	Token    string `form:"token" binding:"required"`
+	ClientID string `form:"client_id"`
 }

 type OidcUpdateAllowedUserGroupsDto struct {
@@ -139,6 +140,7 @@ type OidcDeviceAuthorizationRequestDto struct {
 	ClientSecret        string `form:"client_secret"`
 	ClientAssertion     string `form:"client_assertion"`
 	ClientAssertionType string `form:"client_assertion_type"`
+	Nonce               string `form:"nonce"`
 }

 type OidcDeviceAuthorizationResponseDto struct {
--- a/backend/internal/dto/one_time_access_dto.go
+++ b/backend/internal/dto/one_time_access_dto.go
@@ -0,0 +1,16 @@
+package dto
+
+import "github.com/pocket-id/pocket-id/backend/internal/utils"
+
+type OneTimeAccessTokenCreateDto struct {
+	TTL utils.JSONDuration `json:"ttl" binding:"ttl"`
+}
+
+type OneTimeAccessEmailAsUnauthenticatedUserDto struct {
+	Email        string `json:"email" binding:"required,email" unorm:"nfc"`
+	RedirectPath string `json:"redirectPath"`
+}
+
+type OneTimeAccessEmailAsAdminDto struct {
+	TTL utils.JSONDuration `json:"ttl" binding:"ttl"`
+}
--- a/backend/internal/dto/scim_dto.go
+++ b/backend/internal/dto/scim_dto.go
@@ -67,7 +67,7 @@ type ScimResourceData struct {
 type ScimResourceMeta struct {
 	Location     string    `json:"location,omitempty"`
 	ResourceType string    `json:"resourceType,omitempty"`
-	Created      time.Time `json:"created,omitempty"`
+	Created      time.Time `json:"created"`
 	LastModified time.Time `json:"lastModified,omitempty"`
 	Version      string    `json:"version,omitempty"`
 }
--- a/backend/internal/dto/signup_dto.go
+++ b/backend/internal/dto/signup_dto.go
@@ -0,0 +1,9 @@
+package dto
+
+type SignUpDto struct {
+	Username  string  `json:"username" binding:"required,username,min=1,max=50" unorm:"nfc"`
+	Email     *string `json:"email" binding:"omitempty,email" unorm:"nfc"`
+	FirstName string  `json:"firstName" binding:"max=50" unorm:"nfc"`
+	LastName  string  `json:"lastName" binding:"max=50" unorm:"nfc"`
+	Token     string  `json:"token"`
+}
--- a/backend/internal/dto/user_dto.go
+++ b/backend/internal/dto/user_dto.go
@@ -4,35 +4,36 @@ import (
 	"errors"

 	"github.com/gin-gonic/gin/binding"
-	"github.com/pocket-id/pocket-id/backend/internal/utils"
 )

 type UserDto struct {
-	ID           string                `json:"id"`
-	Username     string                `json:"username"`
-	Email        *string               `json:"email" `
-	FirstName    string                `json:"firstName"`
-	LastName     *string               `json:"lastName"`
-	DisplayName  string                `json:"displayName"`
-	IsAdmin      bool                  `json:"isAdmin"`
-	Locale       *string               `json:"locale"`
-	CustomClaims []CustomClaimDto      `json:"customClaims"`
-	UserGroups   []UserGroupMinimalDto `json:"userGroups"`
-	LdapID       *string               `json:"ldapId"`
-	Disabled     bool                  `json:"disabled"`
+	ID            string                `json:"id"`
+	Username      string                `json:"username"`
+	Email         *string               `json:"email"`
+	EmailVerified bool                  `json:"emailVerified"`
+	FirstName     string                `json:"firstName"`
+	LastName      *string               `json:"lastName"`
+	DisplayName   string                `json:"displayName"`
+	IsAdmin       bool                  `json:"isAdmin"`
+	Locale        *string               `json:"locale"`
+	CustomClaims  []CustomClaimDto      `json:"customClaims"`
+	UserGroups    []UserGroupMinimalDto `json:"userGroups"`
+	LdapID        *string               `json:"ldapId"`
+	Disabled      bool                  `json:"disabled"`
 }

 type UserCreateDto struct {
-	Username     string   `json:"username" binding:"required,username,min=2,max=50" unorm:"nfc"`
-	Email        *string  `json:"email" binding:"omitempty,email" unorm:"nfc"`
-	FirstName    string   `json:"firstName" binding:"required,min=1,max=50" unorm:"nfc"`
-	LastName     string   `json:"lastName" binding:"max=50" unorm:"nfc"`
-	DisplayName  string   `json:"displayName" binding:"required,min=1,max=100" unorm:"nfc"`
-	IsAdmin      bool     `json:"isAdmin"`
-	Locale       *string  `json:"locale"`
-	Disabled     bool     `json:"disabled"`
-	UserGroupIds []string `json:"userGroupIds"`
-	LdapID       string   `json:"-"`
+	Username      string   `json:"username" binding:"required,username,min=1,max=50" unorm:"nfc"`
+	Email         *string  `json:"email" binding:"omitempty,email" unorm:"nfc"`
+	EmailVerified bool     `json:"emailVerified"`
+	FirstName     string   `json:"firstName" binding:"max=50" unorm:"nfc"`
+	LastName      string   `json:"lastName" binding:"max=50" unorm:"nfc"`
+	DisplayName   string   `json:"displayName" binding:"max=100" unorm:"nfc"`
+	IsAdmin       bool     `json:"isAdmin"`
+	Locale        *string  `json:"locale"`
+	Disabled      bool     `json:"disabled"`
+	UserGroupIds  []string `json:"userGroupIds"`
+	LdapID        string   `json:"-"`
 }

 func (u UserCreateDto) Validate() error {
@@ -46,28 +47,10 @@ func (u UserCreateDto) Validate() error {
 	return e.Struct(u)
 }

-type OneTimeAccessTokenCreateDto struct {
-	UserID string             `json:"userId"`
-	TTL    utils.JSONDuration `json:"ttl" binding:"ttl"`
-}
-
-type OneTimeAccessEmailAsUnauthenticatedUserDto struct {
-	Email        string `json:"email" binding:"required,email" unorm:"nfc"`
-	RedirectPath string `json:"redirectPath"`
-}
-
-type OneTimeAccessEmailAsAdminDto struct {
-	TTL utils.JSONDuration `json:"ttl" binding:"ttl"`
+type EmailVerificationDto struct {
+	Token string `json:"token" binding:"required"`
 }

 type UserUpdateUserGroupDto struct {
 	UserGroupIds []string `json:"userGroupIds" binding:"required"`
 }
-
-type SignUpDto struct {
-	Username  string  `json:"username" binding:"required,username,min=2,max=50" unorm:"nfc"`
-	Email     *string `json:"email" binding:"omitempty,email" unorm:"nfc"`
-	FirstName string  `json:"firstName" binding:"required,min=1,max=50" unorm:"nfc"`
-	LastName  string  `json:"lastName" binding:"max=50" unorm:"nfc"`
-	Token     string  `json:"token"`
-}
--- a/backend/internal/dto/user_dto_test.go
+++ b/backend/internal/dto/user_dto_test.go
@@ -3,7 +3,6 @@ package dto
 import (
 	"testing"

-	"github.com/pocket-id/pocket-id/backend/internal/utils"
 	"github.com/stretchr/testify/require"
 )

@@ -17,7 +16,7 @@ func TestUserCreateDto_Validate(t *testing.T) {
 			name: "valid input",
 			input: UserCreateDto{
 				Username:    "testuser",
-				Email:       utils.Ptr("test@example.com"),
+				Email:       new("test@example.com"),
 				FirstName:   "John",
 				LastName:    "Doe",
 				DisplayName: "John Doe",
@@ -27,27 +26,37 @@ func TestUserCreateDto_Validate(t *testing.T) {
 		{
 			name: "missing username",
 			input: UserCreateDto{
-				Email:       utils.Ptr("test@example.com"),
+				Email:       new("test@example.com"),
 				FirstName:   "John",
 				LastName:    "Doe",
 				DisplayName: "John Doe",
 			},
 			wantErr: "Field validation for 'Username' failed on the 'required' tag",
 		},
+		{
+			name: "missing first name",
+			input: UserCreateDto{
+				Username: "testuser",
+				Email:    new("test@example.com"),
+				LastName: "Doe",
+			},
+			wantErr: "",
+		},
 		{
 			name: "missing display name",
 			input: UserCreateDto{
-				Email:     utils.Ptr("test@example.com"),
+				Username:  "testuser",
+				Email:     new("test@example.com"),
 				FirstName: "John",
 				LastName:  "Doe",
 			},
-			wantErr: "Field validation for 'DisplayName' failed on the 'required' tag",
+			wantErr: "",
 		},
 		{
 			name: "username contains invalid characters",
 			input: UserCreateDto{
 				Username:    "test/ser",
-				Email:       utils.Ptr("test@example.com"),
+				Email:       new("test@example.com"),
 				FirstName:   "John",
 				LastName:    "Doe",
 				DisplayName: "John Doe",
@@ -58,7 +67,7 @@ func TestUserCreateDto_Validate(t *testing.T) {
 			name: "invalid email",
 			input: UserCreateDto{
 				Username:    "testuser",
-				Email:       utils.Ptr("not-an-email"),
+				Email:       new("not-an-email"),
 				FirstName:   "John",
 				LastName:    "Doe",
 				DisplayName: "John Doe",
@@ -69,18 +78,18 @@ func TestUserCreateDto_Validate(t *testing.T) {
 			name: "first name too short",
 			input: UserCreateDto{
 				Username:    "testuser",
-				Email:       utils.Ptr("test@example.com"),
+				Email:       new("test@example.com"),
 				FirstName:   "",
 				LastName:    "Doe",
 				DisplayName: "John Doe",
 			},
-			wantErr: "Field validation for 'FirstName' failed on the 'required' tag",
+			wantErr: "",
 		},
 		{
 			name: "last name too long",
 			input: UserCreateDto{
 				Username:    "testuser",
-				Email:       utils.Ptr("test@example.com"),
+				Email:       new("test@example.com"),
 				FirstName:   "John",
 				LastName:    "abcdfghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz",
 				DisplayName: "John Doe",
--- a/backend/internal/dto/validations.go
+++ b/backend/internal/dto/validations.go
@@ -15,43 +15,44 @@ import (
 // [a-zA-Z0-9]      : The username must start with an alphanumeric character
 // [a-zA-Z0-9_.@-]* : The rest of the username can contain alphanumeric characters, dots, underscores, hyphens, and "@" symbols
 // [a-zA-Z0-9]$     : The username must end with an alphanumeric character
-var validateUsernameRegex = regexp.MustCompile("^[a-zA-Z0-9][a-zA-Z0-9_.@-]*[a-zA-Z0-9]$")
+// (...)?           : This allows single-character usernames (just one alphanumeric character)
+var validateUsernameRegex = regexp.MustCompile("^[a-zA-Z0-9]([a-zA-Z0-9_.@-]*[a-zA-Z0-9])?$")

 var validateClientIDRegex = regexp.MustCompile("^[a-zA-Z0-9._-]+$")

 func init() {
-	v := binding.Validator.Engine().(*validator.Validate)
+	engine := binding.Validator.Engine().(*validator.Validate)

 	// Maximum allowed value for TTLs
 	const maxTTL = 31 * 24 * time.Hour

-	if err := v.RegisterValidation("username", func(fl validator.FieldLevel) bool {
-		return ValidateUsername(fl.Field().String())
-	}); err != nil {
-		panic("Failed to register custom validation for username: " + err.Error())
+	validators := map[string]validator.Func{
+		"username": func(fl validator.FieldLevel) bool {
+			return ValidateUsername(fl.Field().String())
+		},
+		"client_id": func(fl validator.FieldLevel) bool {
+			return ValidateClientID(fl.Field().String())
+		},
+		"ttl": func(fl validator.FieldLevel) bool {
+			ttl, ok := fl.Field().Interface().(utils.JSONDuration)
+			if !ok {
+				return false
+			}
+			// Allow zero, which means the field wasn't set
+			return ttl.Duration == 0 || (ttl.Duration > time.Second && ttl.Duration <= maxTTL)
+		},
+		"callback_url": func(fl validator.FieldLevel) bool {
+			return ValidateCallbackURL(fl.Field().String())
+		},
+		"callback_url_pattern": func(fl validator.FieldLevel) bool {
+			return ValidateCallbackURLPattern(fl.Field().String())
+		},
 	}
-
-	if err := v.RegisterValidation("client_id", func(fl validator.FieldLevel) bool {
-		return ValidateClientID(fl.Field().String())
-	}); err != nil {
-		panic("Failed to register custom validation for client_id: " + err.Error())
-	}
-
-	if err := v.RegisterValidation("ttl", func(fl validator.FieldLevel) bool {
-		ttl, ok := fl.Field().Interface().(utils.JSONDuration)
-		if !ok {
-			return false
+	for k, v := range validators {
+		err := engine.RegisterValidation(k, v)
+		if err != nil {
+			panic("Failed to register custom validation for " + k + ": " + err.Error())
 		}
-		// Allow zero, which means the field wasn't set
-		return ttl.Duration == 0 || (ttl.Duration > time.Second && ttl.Duration <= maxTTL)
-	}); err != nil {
-		panic("Failed to register custom validation for ttl: " + err.Error())
-	}
-
-	if err := v.RegisterValidation("callback_url", func(fl validator.FieldLevel) bool {
-		return ValidateCallbackURL(fl.Field().String())
-	}); err != nil {
-		panic("Failed to register custom validation for callback_url: " + err.Error())
 	}
 }

@@ -65,21 +66,24 @@ func ValidateClientID(clientID string) bool {
 	return validateClientIDRegex.MatchString(clientID)
 }

-// ValidateCallbackURL validates callback URLs with support for wildcards
-func ValidateCallbackURL(raw string) bool {
-	// Don't validate if it contains a wildcard
-	if strings.Contains(raw, "*") {
-		return true
-	}
-
-	u, err := url.Parse(raw)
+// ValidateCallbackURL validates the input callback URL
+func ValidateCallbackURL(str string) bool {
+	// Ensure the URL is a valid one and that the protocol is not "javascript:" or "data:"
+	u, err := url.Parse(str)
 	if err != nil {
 		return false
 	}

-	if !u.IsAbs() {
+	switch strings.ToLower(u.Scheme) {
+	case "javascript", "data":
 		return false
+	default:
+		return true
 	}
-
-	return true
+}
+
+// ValidateCallbackURLPattern validates callback URL patterns, with support for wildcards
+func ValidateCallbackURLPattern(raw string) bool {
+	err := utils.ValidateCallbackURLPattern(raw)
+	return err == nil
 }
--- a/backend/internal/dto/validations_test.go
+++ b/backend/internal/dto/validations_test.go
@@ -20,6 +20,7 @@ func TestValidateUsername(t *testing.T) {
 		{"starts with symbol", ".username", false},
 		{"ends with non-alphanumeric", "username-", false},
 		{"contains space", "user name", false},
+		{"valid single char", "a", true},
 		{"empty", "", false},
 		{"only special chars", "-._@", false},
 		{"valid long", "a1234567890_b.c-d@e", true},
@@ -56,3 +57,28 @@ func TestValidateClientID(t *testing.T) {
 		})
 	}
 }
+
+func TestValidateCallbackURL(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected bool
+	}{
+		{"valid https URL", "https://example.com/callback", true},
+		{"valid loopback URL", "http://127.0.0.1:49813/callback", true},
+		{"empty scheme", "//127.0.0.1:49813/callback", true},
+		{"valid custom scheme", "pocketid://callback", true},
+		{"invalid malformed URL", "http://[::1", false},
+		{"invalid missing scheme separator", "://example.com/callback", false},
+		{"rejects javascript scheme", "javascript:alert(1)", false},
+		{"rejects mixed case javascript scheme", "JavaScript:alert(1)", false},
+		{"rejects data scheme", "data:text/html;base64,PGgxPkhlbGxvPC9oMT4=", false},
+		{"rejects mixed case data scheme", "DaTa:text/html;base64,PGgxPkhlbGxvPC9oMT4=", false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.expected, ValidateCallbackURL(tt.input))
+		})
+	}
+}
--- a/backend/internal/job/analytics_job.go
+++ b/backend/internal/job/analytics_job.go
@@ -28,7 +28,7 @@ func (s *Scheduler) RegisterAnalyticsJob(ctx context.Context, appConfig *service
 		appConfig:  appConfig,
 		httpClient: httpClient,
 	}
-	return s.registerJob(ctx, "SendHeartbeat", gocron.DurationJob(24*time.Hour), jobs.sendHeartbeat, true)
+	return s.RegisterJob(ctx, "SendHeartbeat", gocron.DurationJob(24*time.Hour), jobs.sendHeartbeat, service.RegisterJobOpts{RunImmediately: true})
 }

 type AnalyticsJob struct {
--- a/backend/internal/job/api_key_expiry_job.go
+++ b/backend/internal/job/api_key_expiry_job.go
@@ -22,7 +22,7 @@ func (s *Scheduler) RegisterApiKeyExpiryJob(ctx context.Context, apiKeyService *
 	}

 	// Send every day at midnight
-	return s.registerJob(ctx, "ExpiredApiKeyEmailJob", gocron.CronJob("0 0 * * *", false), jobs.checkAndNotifyExpiringApiKeys, false)
+	return s.RegisterJob(ctx, "ExpiredApiKeyEmailJob", gocron.CronJob("0 0 * * *", false), jobs.checkAndNotifyExpiringApiKeys, service.RegisterJobOpts{})
 }

 func (j *ApiKeyEmailJobs) checkAndNotifyExpiringApiKeys(ctx context.Context) error {
@@ -42,7 +42,11 @@ func (j *ApiKeyEmailJobs) checkAndNotifyExpiringApiKeys(ctx context.Context) err
 		}
 		err = j.apiKeyService.SendApiKeyExpiringSoonEmail(ctx, key)
 		if err != nil {
-			slog.ErrorContext(ctx, "Failed to send expiring API key notification email", slog.String("key", key.ID), slog.Any("error", err))
+			slog.ErrorContext(ctx, "Failed to send expiring API key notification email",
+				slog.String("key", key.ID),
+				slog.String("user", key.User.ID),
+				slog.Any("error", err),
+			)
 		}
 	}
 	return nil
--- a/backend/internal/job/db_cleanup_job.go
+++ b/backend/internal/job/db_cleanup_job.go
@@ -7,27 +7,37 @@ import (
 	"log/slog"
 	"time"

-	"github.com/go-co-op/gocron/v2"
+	backoff "github.com/cenkalti/backoff/v5"
 	"gorm.io/gorm"

 	"github.com/pocket-id/pocket-id/backend/internal/common"
 	"github.com/pocket-id/pocket-id/backend/internal/model"
 	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
+	"github.com/pocket-id/pocket-id/backend/internal/service"
 )

 func (s *Scheduler) RegisterDbCleanupJobs(ctx context.Context, db *gorm.DB) error {
 	jobs := &DbCleanupJobs{db: db}

-	// Run every 24 hours (but with some jitter so they don't run at the exact same time), and now
-	def := gocron.DurationRandomJob(24*time.Hour-2*time.Minute, 24*time.Hour+2*time.Minute)
+	newBackOff := func() *backoff.ExponentialBackOff {
+		bo := backoff.NewExponentialBackOff()
+		bo.Multiplier = 4
+		bo.RandomizationFactor = 0.1
+		bo.InitialInterval = time.Second
+		bo.MaxInterval = 45 * time.Second
+		return bo
+	}
+
+	// Use exponential backoff for each DB cleanup job so transient query failures are retried automatically rather than causing an immediate job failure
 	return errors.Join(
-		s.registerJob(ctx, "ClearWebauthnSessions", def, jobs.clearWebauthnSessions, true),
-		s.registerJob(ctx, "ClearOneTimeAccessTokens", def, jobs.clearOneTimeAccessTokens, true),
-		s.registerJob(ctx, "ClearSignupTokens", def, jobs.clearSignupTokens, true),
-		s.registerJob(ctx, "ClearOidcAuthorizationCodes", def, jobs.clearOidcAuthorizationCodes, true),
-		s.registerJob(ctx, "ClearOidcRefreshTokens", def, jobs.clearOidcRefreshTokens, true),
-		s.registerJob(ctx, "ClearReauthenticationTokens", def, jobs.clearReauthenticationTokens, true),
-		s.registerJob(ctx, "ClearAuditLogs", def, jobs.clearAuditLogs, true),
+		s.RegisterJob(ctx, "ClearWebauthnSessions", jobDefWithJitter(24*time.Hour), jobs.clearWebauthnSessions, service.RegisterJobOpts{RunImmediately: true, BackOff: newBackOff()}),
+		s.RegisterJob(ctx, "ClearOneTimeAccessTokens", jobDefWithJitter(24*time.Hour), jobs.clearOneTimeAccessTokens, service.RegisterJobOpts{RunImmediately: true, BackOff: newBackOff()}),
+		s.RegisterJob(ctx, "ClearSignupTokens", jobDefWithJitter(24*time.Hour), jobs.clearSignupTokens, service.RegisterJobOpts{RunImmediately: true, BackOff: newBackOff()}),
+		s.RegisterJob(ctx, "ClearEmailVerificationTokens", jobDefWithJitter(24*time.Hour), jobs.clearEmailVerificationTokens, service.RegisterJobOpts{RunImmediately: true, BackOff: newBackOff()}),
+		s.RegisterJob(ctx, "ClearOidcAuthorizationCodes", jobDefWithJitter(24*time.Hour), jobs.clearOidcAuthorizationCodes, service.RegisterJobOpts{RunImmediately: true, BackOff: newBackOff()}),
+		s.RegisterJob(ctx, "ClearOidcRefreshTokens", jobDefWithJitter(24*time.Hour), jobs.clearOidcRefreshTokens, service.RegisterJobOpts{RunImmediately: true, BackOff: newBackOff()}),
+		s.RegisterJob(ctx, "ClearReauthenticationTokens", jobDefWithJitter(24*time.Hour), jobs.clearReauthenticationTokens, service.RegisterJobOpts{RunImmediately: true, BackOff: newBackOff()}),
+		s.RegisterJob(ctx, "ClearAuditLogs", jobDefWithJitter(24*time.Hour), jobs.clearAuditLogs, service.RegisterJobOpts{RunImmediately: true, BackOff: newBackOff()}),
 	)
 }

@@ -135,3 +145,16 @@ func (j *DbCleanupJobs) clearAuditLogs(ctx context.Context) error {

 	return nil
 }
+
+// ClearEmailVerificationTokens deletes email verification tokens that have expired
+func (j *DbCleanupJobs) clearEmailVerificationTokens(ctx context.Context) error {
+	st := j.db.
+		WithContext(ctx).
+		Delete(&model.EmailVerificationToken{}, "expires_at < ?", datatype.DateTime(time.Now()))
+	if st.Error != nil {
+		return fmt.Errorf("failed to clean expired email verification tokens: %w", st.Error)
+	}
+
+	slog.InfoContext(ctx, "Cleaned expired email verification tokens", slog.Int64("count", st.RowsAffected))
+	return nil
+}
--- a/backend/internal/job/file_cleanup_job.go
+++ b/backend/internal/job/file_cleanup_job.go
@@ -13,20 +13,26 @@ import (
 	"gorm.io/gorm"

 	"github.com/pocket-id/pocket-id/backend/internal/model"
+	"github.com/pocket-id/pocket-id/backend/internal/service"
 	"github.com/pocket-id/pocket-id/backend/internal/storage"
 )

 func (s *Scheduler) RegisterFileCleanupJobs(ctx context.Context, db *gorm.DB, fileStorage storage.FileStorage) error {
 	jobs := &FileCleanupJobs{db: db, fileStorage: fileStorage}

-	err := s.registerJob(ctx, "ClearUnusedDefaultProfilePictures", gocron.DurationJob(24*time.Hour), jobs.clearUnusedDefaultProfilePictures, false)
+	var errs []error
+	errs = append(errs,
+		s.RegisterJob(ctx, "ClearUnusedDefaultProfilePictures", gocron.DurationJob(24*time.Hour), jobs.clearUnusedDefaultProfilePictures, service.RegisterJobOpts{}),
+	)

 	// Only necessary for file system storage
 	if fileStorage.Type() == storage.TypeFileSystem {
-		err = errors.Join(err, s.registerJob(ctx, "ClearOrphanedTempFiles", gocron.DurationJob(12*time.Hour), jobs.clearOrphanedTempFiles, true))
+		errs = append(errs,
+			s.RegisterJob(ctx, "ClearOrphanedTempFiles", gocron.DurationJob(12*time.Hour), jobs.clearOrphanedTempFiles, service.RegisterJobOpts{RunImmediately: true}),
+		)
 	}

-	return err
+	return errors.Join(errs...)
 }

 type FileCleanupJobs struct {
@@ -68,7 +74,8 @@ func (j *FileCleanupJobs) clearUnusedDefaultProfilePictures(ctx context.Context)
 		// If these initials aren't used by any user, delete the file
 		if _, ok := initialsInUse[initials]; !ok {
 			filePath := path.Join(defaultPicturesDir, filename)
-			if err := j.fileStorage.Delete(ctx, filePath); err != nil {
+			err = j.fileStorage.Delete(ctx, filePath)
+			if err != nil {
 				slog.ErrorContext(ctx, "Failed to delete unused default profile picture", slog.String("path", filePath), slog.Any("error", err))
 			} else {
 				filesDeleted++
@@ -95,8 +102,9 @@ func (j *FileCleanupJobs) clearOrphanedTempFiles(ctx context.Context) error {
 			return nil
 		}

-		if err := j.fileStorage.Delete(ctx, p.Path); err != nil {
-			slog.ErrorContext(ctx, "Failed to delete temp file", slog.String("path", p.Path), slog.Any("error", err))
+		rErr := j.fileStorage.Delete(ctx, p.Path)
+		if rErr != nil {
+			slog.ErrorContext(ctx, "Failed to delete temp file", slog.String("path", p.Path), slog.Any("error", rErr))
 			return nil
 		}
 		deleted++
--- a/backend/internal/job/geoloite_update_job.go
+++ b/backend/internal/job/geoloite_update_job.go
@@ -23,7 +23,7 @@ func (s *Scheduler) RegisterGeoLiteUpdateJobs(ctx context.Context, geoLiteServic
 	jobs := &GeoLiteUpdateJobs{geoLiteService: geoLiteService}

 	// Run every 24 hours (and right away)
-	return s.registerJob(ctx, "UpdateGeoLiteDB", gocron.DurationJob(24*time.Hour), jobs.updateGoeLiteDB, true)
+	return s.RegisterJob(ctx, "UpdateGeoLiteDB", gocron.DurationJob(24*time.Hour), jobs.updateGoeLiteDB, service.RegisterJobOpts{RunImmediately: true})
 }

 func (j *GeoLiteUpdateJobs) updateGoeLiteDB(ctx context.Context) error {
--- a/backend/internal/job/ldap_job.go
+++ b/backend/internal/job/ldap_job.go
@@ -4,8 +4,6 @@ import (
 	"context"
 	"time"

-	"github.com/go-co-op/gocron/v2"
-
 	"github.com/pocket-id/pocket-id/backend/internal/service"
 )

@@ -17,8 +15,8 @@ type LdapJobs struct {
 func (s *Scheduler) RegisterLdapJobs(ctx context.Context, ldapService *service.LdapService, appConfigService *service.AppConfigService) error {
 	jobs := &LdapJobs{ldapService: ldapService, appConfigService: appConfigService}

-	// Register the job to run every hour
-	return s.registerJob(ctx, "SyncLdap", gocron.DurationJob(time.Hour), jobs.syncLdap, true)
+	// Register the job to run every hour (with some jitter)
+	return s.RegisterJob(ctx, "SyncLdap", jobDefWithJitter(time.Hour), jobs.syncLdap, service.RegisterJobOpts{RunImmediately: true})
 }

 func (j *LdapJobs) syncLdap(ctx context.Context) error {
--- a/backend/internal/job/scheduler.go
+++ b/backend/internal/job/scheduler.go
@@ -2,11 +2,16 @@ package job

 import (
 	"context"
+	"errors"
 	"fmt"
 	"log/slog"
+	"time"

+	backoff "github.com/cenkalti/backoff/v5"
 	"github.com/go-co-op/gocron/v2"
 	"github.com/google/uuid"
+
+	"github.com/pocket-id/pocket-id/backend/internal/service"
 )

 type Scheduler struct {
@@ -24,6 +29,22 @@ func NewScheduler() (*Scheduler, error) {
 	}, nil
 }

+func (s *Scheduler) RemoveJob(name string) error {
+	jobs := s.scheduler.Jobs()
+
+	var errs []error
+	for _, job := range jobs {
+		if job.Name() == name {
+			err := s.scheduler.RemoveJob(job.ID())
+			if err != nil {
+				errs = append(errs, fmt.Errorf("failed to dequeue job %q with ID %q: %w", name, job.ID().String(), err))
+			}
+		}
+	}
+
+	return errors.Join(errs...)
+}
+
 // Run the scheduler.
 // This function blocks until the context is canceled.
 func (s *Scheduler) Run(ctx context.Context) error {
@@ -43,9 +64,32 @@ func (s *Scheduler) Run(ctx context.Context) error {
 	return nil
 }

-func (s *Scheduler) registerJob(ctx context.Context, name string, def gocron.JobDefinition, job func(ctx context.Context) error, runImmediately bool) error {
+func (s *Scheduler) RegisterJob(ctx context.Context, name string, def gocron.JobDefinition, jobFn func(ctx context.Context) error, opts service.RegisterJobOpts) error {
+	// If a BackOff strategy is provided, wrap the job with retry logic
+	if opts.BackOff != nil {
+		origJob := jobFn
+		jobFn = func(ctx context.Context) error {
+			_, err := backoff.Retry(
+				ctx,
+				func() (struct{}, error) {
+					return struct{}{}, origJob(ctx)
+				},
+				backoff.WithBackOff(opts.BackOff),
+				backoff.WithNotify(func(err error, d time.Duration) {
+					slog.WarnContext(ctx, "Job failed, retrying",
+						slog.String("name", name),
+						slog.Any("error", err),
+						slog.Duration("retryIn", d),
+					)
+				}),
+			)
+			return err
+		}
+	}
+
 	jobOptions := []gocron.JobOption{
 		gocron.WithContext(ctx),
+		gocron.WithName(name),
 		gocron.WithEventListeners(
 			gocron.BeforeJobRuns(func(jobID uuid.UUID, jobName string) {
 				slog.Info("Starting job",
@@ -69,11 +113,13 @@ func (s *Scheduler) registerJob(ctx context.Context, name string, def gocron.Job
 		),
 	}

-	if runImmediately {
+	if opts.RunImmediately {
 		jobOptions = append(jobOptions, gocron.JobOption(gocron.WithStartImmediately()))
 	}

-	_, err := s.scheduler.NewJob(def, gocron.NewTask(job), jobOptions...)
+	jobOptions = append(jobOptions, opts.ExtraOptions...)
+
+	_, err := s.scheduler.NewJob(def, gocron.NewTask(jobFn), jobOptions...)

 	if err != nil {
 		return fmt.Errorf("failed to register job %q: %w", name, err)
@@ -81,3 +127,9 @@ func (s *Scheduler) registerJob(ctx context.Context, name string, def gocron.Job

 	return nil
 }
+
+func jobDefWithJitter(interval time.Duration) gocron.JobDefinition {
+	const jitter = 5 * time.Minute
+
+	return gocron.DurationRandomJob(interval-jitter, interval+jitter)
+}
--- a/backend/internal/job/scim_job.go
+++ b/backend/internal/job/scim_job.go
@@ -0,0 +1,25 @@
+package job
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-co-op/gocron/v2"
+
+	"github.com/pocket-id/pocket-id/backend/internal/service"
+)
+
+type ScimJobs struct {
+	scimService *service.ScimService
+}
+
+func (s *Scheduler) RegisterScimJobs(ctx context.Context, scimService *service.ScimService) error {
+	jobs := &ScimJobs{scimService: scimService}
+
+	// Register the job to run every hour (with some jitter)
+	return s.RegisterJob(ctx, "SyncScim", gocron.DurationJob(time.Hour), jobs.SyncScim, service.RegisterJobOpts{RunImmediately: true})
+}
+
+func (j *ScimJobs) SyncScim(ctx context.Context) error {
+	return j.scimService.SyncAll(ctx)
+}
--- a/backend/internal/middleware/api_key_auth.go
+++ b/backend/internal/middleware/api_key_auth.go
@@ -34,7 +34,7 @@ func (m *ApiKeyAuthMiddleware) Add(adminRequired bool) gin.HandlerFunc {
 }

 func (m *ApiKeyAuthMiddleware) Verify(c *gin.Context, adminRequired bool) (userID string, isAdmin bool, err error) {
-	apiKey := c.GetHeader("X-API-KEY")
+	apiKey := c.GetHeader("X-API-Key")

 	user, err := m.apiKeyService.ValidateApiKey(c.Request.Context(), apiKey)
 	if err != nil {
--- a/backend/internal/middleware/auth_middleware.go
+++ b/backend/internal/middleware/auth_middleware.go
@@ -18,6 +18,7 @@ type AuthMiddleware struct {
 type AuthOptions struct {
 	AdminRequired   bool
 	SuccessOptional bool
+	AllowApiKeyAuth bool
 }

 func NewAuthMiddleware(
@@ -31,6 +32,7 @@ func NewAuthMiddleware(
 		options: AuthOptions{
 			AdminRequired:   true,
 			SuccessOptional: false,
+			AllowApiKeyAuth: true,
 		},
 	}
 }
@@ -59,6 +61,17 @@ func (m *AuthMiddleware) WithSuccessOptional() *AuthMiddleware {
 	return clone
 }

+// WithApiKeyAuthDisabled disables API key authentication fallback and requires JWT auth.
+func (m *AuthMiddleware) WithApiKeyAuthDisabled() *AuthMiddleware {
+	clone := &AuthMiddleware{
+		apiKeyMiddleware: m.apiKeyMiddleware,
+		jwtMiddleware:    m.jwtMiddleware,
+		options:          m.options,
+	}
+	clone.options.AllowApiKeyAuth = false
+	return clone
+}
+
 func (m *AuthMiddleware) Add() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		userID, isAdmin, err := m.jwtMiddleware.Verify(c, m.options.AdminRequired)
@@ -79,6 +92,21 @@ func (m *AuthMiddleware) Add() gin.HandlerFunc {
 			return
 		}

+		if !m.options.AllowApiKeyAuth {
+			if m.options.SuccessOptional {
+				c.Next()
+				return
+			}
+
+			c.Abort()
+			if c.GetHeader("X-API-Key") != "" {
+				_ = c.Error(&common.APIKeyAuthNotAllowedError{})
+				return
+			}
+			_ = c.Error(err)
+			return
+		}
+
 		// JWT auth failed, try API key auth
 		userID, isAdmin, err = m.apiKeyMiddleware.Verify(c, m.options.AdminRequired)
 		if err == nil {
--- a/backend/internal/middleware/auth_middleware_test.go
+++ b/backend/internal/middleware/auth_middleware_test.go
@@ -0,0 +1,104 @@
+package middleware
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/require"
+	"gorm.io/gorm"
+
+	"github.com/pocket-id/pocket-id/backend/internal/common"
+	"github.com/pocket-id/pocket-id/backend/internal/dto"
+	"github.com/pocket-id/pocket-id/backend/internal/model"
+	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
+	"github.com/pocket-id/pocket-id/backend/internal/service"
+	testutils "github.com/pocket-id/pocket-id/backend/internal/utils/testing"
+)
+
+func TestWithApiKeyAuthDisabled(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	originalEnvConfig := common.EnvConfig
+	defer func() {
+		common.EnvConfig = originalEnvConfig
+	}()
+	common.EnvConfig.AppURL = "https://test.example.com"
+	common.EnvConfig.EncryptionKey = []byte("0123456789abcdef0123456789abcdef")
+
+	db := testutils.NewDatabaseForTest(t)
+
+	appConfigService, err := service.NewAppConfigService(t.Context(), db)
+	require.NoError(t, err)
+
+	jwtService, err := service.NewJwtService(t.Context(), db, appConfigService)
+	require.NoError(t, err)
+
+	userService := service.NewUserService(db, jwtService, nil, nil, appConfigService, nil, nil, nil, nil)
+	apiKeyService, err := service.NewApiKeyService(t.Context(), db, nil)
+	require.NoError(t, err)
+
+	authMiddleware := NewAuthMiddleware(apiKeyService, userService, jwtService)
+
+	user := createUserForAuthMiddlewareTest(t, db)
+	jwtToken, err := jwtService.GenerateAccessToken(user)
+	require.NoError(t, err)
+
+	_, apiKeyToken, err := apiKeyService.CreateApiKey(t.Context(), user.ID, dto.ApiKeyCreateDto{
+		Name:      "Middleware API Key",
+		ExpiresAt: datatype.DateTime(time.Now().Add(24 * time.Hour)),
+	})
+	require.NoError(t, err)
+
+	router := gin.New()
+	router.Use(NewErrorHandlerMiddleware().Add())
+	router.GET("/api/protected", authMiddleware.WithAdminNotRequired().WithApiKeyAuthDisabled().Add(), func(c *gin.Context) {
+		c.Status(http.StatusNoContent)
+	})
+
+	t.Run("rejects API key auth when API key auth is disabled", func(t *testing.T) {
+		req := httptest.NewRequest(http.MethodGet, "/api/protected", nil)
+		req.Header.Set("X-API-Key", apiKeyToken)
+		recorder := httptest.NewRecorder()
+
+		router.ServeHTTP(recorder, req)
+
+		require.Equal(t, http.StatusForbidden, recorder.Code)
+
+		var body map[string]string
+		err := json.Unmarshal(recorder.Body.Bytes(), &body)
+		require.NoError(t, err)
+		require.Equal(t, "API key authentication is not allowed for this endpoint", body["error"])
+	})
+
+	t.Run("allows JWT auth when API key auth is disabled", func(t *testing.T) {
+		req := httptest.NewRequest(http.MethodGet, "/api/protected", nil)
+		req.Header.Set("Authorization", "Bearer "+jwtToken)
+		recorder := httptest.NewRecorder()
+
+		router.ServeHTTP(recorder, req)
+
+		require.Equal(t, http.StatusNoContent, recorder.Code)
+	})
+}
+
+func createUserForAuthMiddlewareTest(t *testing.T, db *gorm.DB) model.User {
+	t.Helper()
+
+	email := "auth@example.com"
+	user := model.User{
+		Username:    "auth-user",
+		Email:       &email,
+		FirstName:   "Auth",
+		LastName:    "User",
+		DisplayName: "Auth User",
+	}
+
+	err := db.Create(&user).Error
+	require.NoError(t, err)
+
+	return user
+}
--- a/backend/internal/middleware/rate_limit.go
+++ b/backend/internal/middleware/rate_limit.go
@@ -17,6 +17,12 @@ func NewRateLimitMiddleware() *RateLimitMiddleware {
 }

 func (m *RateLimitMiddleware) Add(limit rate.Limit, burst int) gin.HandlerFunc {
+	if common.EnvConfig.DisableRateLimiting {
+		return func(c *gin.Context) {
+			c.Next()
+		}
+	}
+
 	// Map to store the rate limiters per IP
 	var clients = make(map[string]*client)
 	var mu sync.Mutex
--- a/backend/internal/model/app_config.go
+++ b/backend/internal/model/app_config.go
@@ -36,6 +36,7 @@ type AppConfig struct {
 	// General
 	AppName                   AppConfigVariable `key:"appName,public"` // Public
 	SessionDuration           AppConfigVariable `key:"sessionDuration"`
+	HomePageURL               AppConfigVariable `key:"homePageUrl,public"` // Public
 	EmailsVerified            AppConfigVariable `key:"emailsVerified"`
 	AccentColor               AppConfigVariable `key:"accentColor,public"`         // Public
 	DisableAnimations         AppConfigVariable `key:"disableAnimations,public"`   // Public
@@ -58,6 +59,7 @@ type AppConfig struct {
 	EmailOneTimeAccessAsUnauthenticatedEnabled AppConfigVariable `key:"emailOneTimeAccessAsUnauthenticatedEnabled,public"` // Public
 	EmailOneTimeAccessAsAdminEnabled           AppConfigVariable `key:"emailOneTimeAccessAsAdminEnabled,public"`           // Public
 	EmailApiKeyExpirationEnabled               AppConfigVariable `key:"emailApiKeyExpirationEnabled"`
+	EmailVerificationEnabled                   AppConfigVariable `key:"emailVerificationEnabled,public"` // Public
 	// LDAP
 	LdapEnabled                        AppConfigVariable `key:"ldapEnabled,public"` // Public
 	LdapUrl                            AppConfigVariable `key:"ldapUrl"`
--- a/backend/internal/model/app_config_test.go
+++ b/backend/internal/model/app_config_test.go
@@ -70,13 +70,12 @@ func TestAppConfigVariable_AsMinutesDuration(t *testing.T) {
 // - dto.AppConfigDto should not include "internal" fields from model.AppConfig
 // This test is primarily meant to catch discrepancies between the two structs as fields are added or removed over time
 func TestAppConfigStructMatchesUpdateDto(t *testing.T) {
-	appConfigType := reflect.TypeOf(model.AppConfig{})
-	updateDtoType := reflect.TypeOf(dto.AppConfigUpdateDto{})
+	appConfigType := reflect.TypeFor[model.AppConfig]()
+	updateDtoType := reflect.TypeFor[dto.AppConfigUpdateDto]()

 	// Process AppConfig fields
 	appConfigFields := make(map[string]string)
-	for i := 0; i < appConfigType.NumField(); i++ {
-		field := appConfigType.Field(i)
+	for field := range appConfigType.Fields() {
 		if field.Tag.Get("key") == "" {
 			// Skip internal fields
 			continue
@@ -91,9 +90,7 @@ func TestAppConfigStructMatchesUpdateDto(t *testing.T) {

 	// Process AppConfigUpdateDto fields
 	dtoFields := make(map[string]string)
-	for i := 0; i < updateDtoType.NumField(); i++ {
-		field := updateDtoType.Field(i)
-
+	for field := range updateDtoType.Fields() {
 		// Extract the json name from the tag (takes the part before any binding constraints)
 		jsonTag := field.Tag.Get("json")
 		jsonName, _, _ := strings.Cut(jsonTag, ",")
--- a/backend/internal/model/email_verification_token.go
+++ b/backend/internal/model/email_verification_token.go
@@ -0,0 +1,13 @@
+package model
+
+import datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
+
+type EmailVerificationToken struct {
+	Base
+
+	Token     string
+	ExpiresAt datatype.DateTime
+
+	UserID string
+	User   User
+}
--- a/backend/internal/model/oidc.go
+++ b/backend/internal/model/oidc.go
@@ -144,6 +144,7 @@ type OidcDeviceCode struct {
 	DeviceCode   string
 	UserCode     string
 	Scope        string
+	Nonce        string
 	ExpiresAt    datatype.DateTime
 	IsAuthorized bool

--- a/backend/internal/model/one_time_access_token.go
+++ b/backend/internal/model/one_time_access_token.go
@@ -0,0 +1,13 @@
+package model
+
+import datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
+
+type OneTimeAccessToken struct {
+	Base
+	Token       string
+	DeviceToken *string
+	ExpiresAt   datatype.DateTime
+
+	UserID string
+	User   User
+}
--- a/backend/internal/model/types/encrypted_string.go
+++ b/backend/internal/model/types/encrypted_string.go
@@ -40,14 +40,9 @@ func (e *EncryptedString) Scan(value any) error {
 		return nil
 	}

-	encBytes, err := base64.StdEncoding.DecodeString(raw)
+	decBytes, err := DecryptEncryptedStringWithKey(encStringKey, raw)
 	if err != nil {
-		return fmt.Errorf("failed to decode encrypted string: %w", err)
-	}
-
-	decBytes, err := cryptoutils.Decrypt(encStringKey, encBytes, []byte(encryptedStringAAD))
-	if err != nil {
-		return fmt.Errorf("failed to decrypt encrypted string: %w", err)
+		return err
 	}

 	*e = EncryptedString(decBytes)
@@ -59,19 +54,20 @@ func (e EncryptedString) Value() (driver.Value, error) {
 		return "", nil
 	}

-	encBytes, err := cryptoutils.Encrypt(encStringKey, []byte(e), []byte(encryptedStringAAD))
+	encValue, err := EncryptEncryptedStringWithKey(encStringKey, []byte(e))
 	if err != nil {
-		return nil, fmt.Errorf("failed to encrypt string: %w", err)
+		return nil, err
 	}

-	return base64.StdEncoding.EncodeToString(encBytes), nil
+	return encValue, nil
 }

 func (e EncryptedString) String() string {
 	return string(e)
 }

-func deriveEncryptedStringKey(master []byte) ([]byte, error) {
+// DeriveEncryptedStringKey derives a key for encrypting EncryptedString values from the master key.
+func DeriveEncryptedStringKey(master []byte) ([]byte, error) {
 	const info = "pocketid/encrypted_string"
 	r := hkdf.New(sha256.New, master, nil, []byte(info))

@@ -82,8 +78,33 @@ func deriveEncryptedStringKey(master []byte) ([]byte, error) {
 	return key, nil
 }

+// DecryptEncryptedStringWithKey decrypts an EncryptedString value using the derived key.
+func DecryptEncryptedStringWithKey(key []byte, encoded string) ([]byte, error) {
+	encBytes, err := base64.StdEncoding.DecodeString(encoded)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decode encrypted string: %w", err)
+	}
+
+	decBytes, err := cryptoutils.Decrypt(key, encBytes, []byte(encryptedStringAAD))
+	if err != nil {
+		return nil, fmt.Errorf("failed to decrypt encrypted string: %w", err)
+	}
+
+	return decBytes, nil
+}
+
+// EncryptEncryptedStringWithKey encrypts an EncryptedString value using the derived key.
+func EncryptEncryptedStringWithKey(key []byte, plaintext []byte) (string, error) {
+	encBytes, err := cryptoutils.Encrypt(key, plaintext, []byte(encryptedStringAAD))
+	if err != nil {
+		return "", fmt.Errorf("failed to encrypt string: %w", err)
+	}
+
+	return base64.StdEncoding.EncodeToString(encBytes), nil
+}
+
 func init() {
-	key, err := deriveEncryptedStringKey(common.EnvConfig.EncryptionKey)
+	key, err := DeriveEncryptedStringKey(common.EnvConfig.EncryptionKey)
 	if err != nil {
 		panic(fmt.Sprintf("failed to derive encrypted string key: %v", err))
 	}
--- a/backend/internal/model/user.go
+++ b/backend/internal/model/user.go
@@ -14,16 +14,17 @@ import (
 type User struct {
 	Base

-	Username    string  `sortable:"true"`
-	Email       *string `sortable:"true"`
-	FirstName   string  `sortable:"true"`
-	LastName    string  `sortable:"true"`
-	DisplayName string  `sortable:"true"`
-	IsAdmin     bool    `sortable:"true" filterable:"true"`
-	Locale      *string
-	LdapID      *string
-	Disabled    bool `sortable:"true" filterable:"true"`
-	UpdatedAt   *datatype.DateTime
+	Username      string  `sortable:"true"`
+	Email         *string `sortable:"true"`
+	EmailVerified bool    `sortable:"true" filterable:"true"`
+	FirstName     string  `sortable:"true"`
+	LastName      string  `sortable:"true"`
+	DisplayName   string  `sortable:"true"`
+	IsAdmin       bool    `sortable:"true" filterable:"true"`
+	Locale        *string
+	LdapID        *string
+	Disabled      bool `sortable:"true" filterable:"true"`
+	UpdatedAt     *datatype.DateTime

 	CustomClaims []CustomClaim
 	UserGroups   []UserGroup `gorm:"many2many:user_groups_users;"`
@@ -38,7 +39,7 @@ func (u User) WebAuthnDisplayName() string {
 	if u.DisplayName != "" {
 		return u.DisplayName
 	}
-	return u.FirstName + " " + u.LastName
+	return u.FullName()
 }

 func (u User) WebAuthnIcon() string { return "" }
@@ -75,7 +76,16 @@ func (u User) WebAuthnCredentialDescriptors() (descriptors []protocol.Credential
 }

 func (u User) FullName() string {
-	return u.FirstName + " " + u.LastName
+	fullname := strings.TrimSpace(u.FirstName + " " + u.LastName)
+	if fullname != "" {
+		return fullname
+	}
+
+	if u.DisplayName != "" {
+		return u.DisplayName
+	}
+
+	return u.Username
 }

 func (u User) Initials() string {
@@ -93,13 +103,3 @@ func (u User) LastModified() time.Time {
 	}
 	return u.CreatedAt.ToTime()
 }
-
-type OneTimeAccessToken struct {
-	Base
-	Token       string
-	DeviceToken *string
-	ExpiresAt   datatype.DateTime
-
-	UserID string
-	User   User
-}
--- a/backend/internal/model/webauthn.go
+++ b/backend/internal/model/webauthn.go
@@ -58,7 +58,7 @@ type ReauthenticationToken struct {
 type AuthenticatorTransportList []protocol.AuthenticatorTransport //nolint:recvcheck

 // Scan and Value methods for GORM to handle the custom type
-func (atl *AuthenticatorTransportList) Scan(value interface{}) error {
+func (atl *AuthenticatorTransportList) Scan(value any) error {
 	return utils.UnmarshalJSONFromDatabase(atl, value)
 }

@@ -69,7 +69,7 @@ func (atl AuthenticatorTransportList) Value() (driver.Value, error) {
 type CredentialParameters []protocol.CredentialParameter //nolint:recvcheck

 // Scan and Value methods for GORM to handle the custom type
-func (cp *CredentialParameters) Scan(value interface{}) error {
+func (cp *CredentialParameters) Scan(value any) error {
 	return utils.UnmarshalJSONFromDatabase(cp, value)
 }

--- a/backend/internal/service/api_key_service.go
+++ b/backend/internal/service/api_key_service.go
@@ -3,6 +3,7 @@ package service
 import (
 	"context"
 	"errors"
+	"fmt"
 	"time"

 	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
@@ -16,13 +17,25 @@ import (
 	"gorm.io/gorm/clause"
 )

+const staticApiKeyUserID = "00000000-0000-0000-0000-000000000000"
+
 type ApiKeyService struct {
 	db           *gorm.DB
 	emailService *EmailService
 }

-func NewApiKeyService(db *gorm.DB, emailService *EmailService) *ApiKeyService {
-	return &ApiKeyService{db: db, emailService: emailService}
+func NewApiKeyService(ctx context.Context, db *gorm.DB, emailService *EmailService) (*ApiKeyService, error) {
+	s := &ApiKeyService{db: db, emailService: emailService}
+
+	if common.EnvConfig.StaticApiKey == "" {
+		err := s.deleteStaticApiKeyUser(ctx)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return s, nil
+
 }

 func (s *ApiKeyService) ListApiKeys(ctx context.Context, userID string, listRequestOptions utils.ListRequestOptions) ([]model.ApiKey, utils.PaginationResponse, error) {
@@ -65,6 +78,9 @@ func (s *ApiKeyService) CreateApiKey(ctx context.Context, userID string, input d
 		Create(&apiKey).
 		Error
 	if err != nil {
+		if errors.Is(err, gorm.ErrDuplicatedKey) {
+			return model.ApiKey{}, "", &common.AlreadyInUseError{Property: "API key name"}
+		}
 		return model.ApiKey{}, "", err
 	}

@@ -72,6 +88,56 @@ func (s *ApiKeyService) CreateApiKey(ctx context.Context, userID string, input d
 	return apiKey, token, nil
 }

+func (s *ApiKeyService) RenewApiKey(ctx context.Context, userID, apiKeyID string, expiration time.Time) (model.ApiKey, string, error) {
+	// Check if expiration is in the future
+	if !expiration.After(time.Now()) {
+		return model.ApiKey{}, "", &common.APIKeyExpirationDateError{}
+	}
+
+	tx := s.db.Begin()
+	defer tx.Rollback()
+
+	var apiKey model.ApiKey
+	err := tx.
+		WithContext(ctx).
+		Model(&model.ApiKey{}).
+		Where("id = ? AND user_id = ?", apiKeyID, userID).
+		First(&apiKey).
+		Error
+
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return model.ApiKey{}, "", &common.APIKeyNotFoundError{}
+		}
+		return model.ApiKey{}, "", err
+	}
+
+	// Only allow renewal if the key has already expired
+	if apiKey.ExpiresAt.ToTime().After(time.Now()) {
+		return model.ApiKey{}, "", &common.APIKeyNotExpiredError{}
+	}
+
+	// Generate a secure random API key
+	token, err := utils.GenerateRandomAlphanumericString(32)
+	if err != nil {
+		return model.ApiKey{}, "", err
+	}
+
+	apiKey.Key = utils.CreateSha256Hash(token)
+	apiKey.ExpiresAt = datatype.DateTime(expiration)
+
+	err = tx.WithContext(ctx).Save(&apiKey).Error
+	if err != nil {
+		return model.ApiKey{}, "", err
+	}
+
+	if err := tx.Commit().Error; err != nil {
+		return model.ApiKey{}, "", err
+	}
+
+	return apiKey, token, nil
+}
+
 func (s *ApiKeyService) RevokeApiKey(ctx context.Context, userID, apiKeyID string) error {
 	var apiKey model.ApiKey
 	err := s.db.
@@ -94,6 +160,10 @@ func (s *ApiKeyService) ValidateApiKey(ctx context.Context, apiKey string) (mode
 		return model.User{}, &common.NoAPIKeyProvidedError{}
 	}

+	if common.EnvConfig.StaticApiKey != "" && apiKey == common.EnvConfig.StaticApiKey {
+		return s.initStaticApiKeyUser(ctx)
+	}
+
 	now := time.Now()
 	hashedKey := utils.CreateSha256Hash(apiKey)

@@ -104,7 +174,7 @@ func (s *ApiKeyService) ValidateApiKey(ctx context.Context, apiKey string) (mode
 		Clauses(clause.Returning{}).
 		Where("key = ? AND expires_at > ?", hashedKey, datatype.DateTime(now)).
 		Updates(&model.ApiKey{
-			LastUsedAt: utils.Ptr(datatype.DateTime(now)),
+			LastUsedAt: new(datatype.DateTime(now)),
 		}).
 		Preload("User").
 		First(&key).
@@ -136,34 +206,75 @@ func (s *ApiKeyService) ListExpiringApiKeys(ctx context.Context, daysAhead int)
 }

 func (s *ApiKeyService) SendApiKeyExpiringSoonEmail(ctx context.Context, apiKey model.ApiKey) error {
-	user := apiKey.User
-
-	if user.ID == "" {
-		if err := s.db.WithContext(ctx).First(&user, "id = ?", apiKey.UserID).Error; err != nil {
-			return err
-		}
-	}
-
-	if user.Email == nil {
+	if apiKey.User.Email == nil {
 		return &common.UserEmailNotSetError{}
 	}

 	err := SendEmail(ctx, s.emailService, email.Address{
-		Name:  user.FullName(),
-		Email: *user.Email,
+		Name:  apiKey.User.FullName(),
+		Email: *apiKey.User.Email,
 	}, ApiKeyExpiringSoonTemplate, &ApiKeyExpiringSoonTemplateData{
 		ApiKeyName: apiKey.Name,
 		ExpiresAt:  apiKey.ExpiresAt.ToTime(),
-		Name:       user.FirstName,
+		Name:       apiKey.User.FirstName,
 	})
 	if err != nil {
-		return err
+		return fmt.Errorf("error sending notification email: %w", err)
 	}

 	// Mark the API key as having had an expiration email sent
-	return s.db.WithContext(ctx).
+	err = s.db.WithContext(ctx).
 		Model(&model.ApiKey{}).
 		Where("id = ?", apiKey.ID).
 		Update("expiration_email_sent", true).
 		Error
+	if err != nil {
+		return fmt.Errorf("error recording expiration sent email in database: %w", err)
+	}
+
+	return nil
+}
+
+func (s *ApiKeyService) initStaticApiKeyUser(ctx context.Context) (user model.User, err error) {
+	err = s.db.
+		WithContext(ctx).
+		First(&user, "id = ?", staticApiKeyUserID).
+		Error
+
+	if err == nil {
+		return user, nil
+	}
+
+	if !errors.Is(err, gorm.ErrRecordNotFound) {
+		return model.User{}, err
+	}
+
+	usernameSuffix, err := utils.GenerateRandomAlphanumericString(6)
+	if err != nil {
+		return model.User{}, err
+	}
+
+	user = model.User{
+		Base: model.Base{
+			ID: staticApiKeyUserID,
+		},
+		FirstName:   "Static API User",
+		Username:    "static-api-user-" + usernameSuffix,
+		DisplayName: "Static API User",
+		IsAdmin:     true,
+	}
+
+	err = s.db.
+		WithContext(ctx).
+		Create(&user).
+		Error
+
+	return user, err
+}
+
+func (s *ApiKeyService) deleteStaticApiKeyUser(ctx context.Context) error {
+	return s.db.
+		WithContext(ctx).
+		Delete(&model.User{}, "id = ?", staticApiKeyUserID).
+		Error
 }
--- a/backend/internal/service/app_config_service.go
+++ b/backend/internal/service/app_config_service.go
@@ -61,6 +61,7 @@ func (s *AppConfigService) getDefaultDbConfig() *model.AppConfig {
 		// General
 		AppName:                   model.AppConfigVariable{Value: "Pocket ID"},
 		SessionDuration:           model.AppConfigVariable{Value: "60"},
+		HomePageURL:               model.AppConfigVariable{Value: "/settings/account"},
 		EmailsVerified:            model.AppConfigVariable{Value: "false"},
 		DisableAnimations:         model.AppConfigVariable{Value: "false"},
 		AllowOwnAccountEdit:       model.AppConfigVariable{Value: "true"},
@@ -83,6 +84,7 @@ func (s *AppConfigService) getDefaultDbConfig() *model.AppConfig {
 		EmailOneTimeAccessAsUnauthenticatedEnabled: model.AppConfigVariable{Value: "false"},
 		EmailOneTimeAccessAsAdminEnabled:           model.AppConfigVariable{Value: "false"},
 		EmailApiKeyExpirationEnabled:               model.AppConfigVariable{Value: "false"},
+		EmailVerificationEnabled:                   model.AppConfigVariable{Value: "false"},
 		// LDAP
 		LdapEnabled:                        model.AppConfigVariable{Value: "false"},
 		LdapUrl:                            model.AppConfigVariable{},
@@ -184,8 +186,7 @@ func (s *AppConfigService) UpdateAppConfig(ctx context.Context, input dto.AppCon
 	rt := reflect.ValueOf(input).Type()
 	rv := reflect.ValueOf(input)
 	dbUpdate := make([]model.AppConfigVariable, 0, rt.NumField())
-	for i := range rt.NumField() {
-		field := rt.Field(i)
+	for field := range rt.Fields() {
 		value := rv.FieldByName(field.Name).String()

 		// Get the value of the json tag, taking only what's before the comma
--- a/backend/internal/service/app_lock_service.go
+++ b/backend/internal/service/app_lock_service.go
@@ -73,7 +73,10 @@ func (lv *lockValue) Unmarshal(raw string) error {
 // Acquire obtains the lock. When force is true, the lock is stolen from any existing owner.
 // If the lock is forcefully acquired, it blocks until the previous lock has expired.
 func (s *AppLockService) Acquire(ctx context.Context, force bool) (waitUntil time.Time, err error) {
-	tx := s.db.Begin()
+	tx := s.db.WithContext(ctx).Begin()
+	if tx.Error != nil {
+		return time.Time{}, fmt.Errorf("begin lock transaction: %w", tx.Error)
+	}
 	defer func() {
 		tx.Rollback()
 	}()
@@ -93,7 +96,8 @@ func (s *AppLockService) Acquire(ctx context.Context, force bool) (waitUntil tim

 	var prevLock lockValue
 	if prevLockRaw != "" {
-		if err := prevLock.Unmarshal(prevLockRaw); err != nil {
+		err = prevLock.Unmarshal(prevLockRaw)
+		if err != nil {
 			return time.Time{}, fmt.Errorf("decode existing lock value: %w", err)
 		}
 	}
@@ -139,7 +143,8 @@ func (s *AppLockService) Acquire(ctx context.Context, force bool) (waitUntil tim
 		return time.Time{}, fmt.Errorf("lock acquisition failed: %w", res.Error)
 	}

-	if err := tx.Commit().Error; err != nil {
+	err = tx.Commit().Error
+	if err != nil {
 		return time.Time{}, fmt.Errorf("commit lock acquisition: %w", err)
 	}

@@ -174,7 +179,8 @@ func (s *AppLockService) RunRenewal(ctx context.Context) error {
 		case <-ctx.Done():
 			return nil
 		case <-ticker.C:
-			if err := s.renew(ctx); err != nil {
+			err := s.renew(ctx)
+			if err != nil {
 				return fmt.Errorf("renew lock: %w", err)
 			}
 		}
@@ -183,33 +189,43 @@ func (s *AppLockService) RunRenewal(ctx context.Context) error {

 // Release releases the lock if it is held by this process.
 func (s *AppLockService) Release(ctx context.Context) error {
-	opCtx, cancel := context.WithTimeout(ctx, 3*time.Second)
-	defer cancel()
+	db, err := s.db.DB()
+	if err != nil {
+		return fmt.Errorf("failed to get DB connection: %w", err)
+	}

 	var query string
 	switch s.db.Name() {
 	case "sqlite":
 		query = `
-		DELETE FROM kv
-		WHERE key = ?
-		  AND json_extract(value, '$.lock_id') = ?
-	`
+DELETE FROM kv
+WHERE key = ?
+  AND json_extract(value, '$.lock_id') = ?
+`
 	case "postgres":
 		query = `
-		DELETE FROM kv
-		WHERE key = $1
-		  AND value::json->>'lock_id' = $2
-	`
+DELETE FROM kv
+WHERE key = $1
+  AND value::json->>'lock_id' = $2
+`
 	default:
 		return fmt.Errorf("unsupported database dialect: %s", s.db.Name())
 	}

-	res := s.db.WithContext(opCtx).Exec(query, lockKey, s.lockID)
-	if res.Error != nil {
-		return fmt.Errorf("release lock failed: %w", res.Error)
+	opCtx, cancel := context.WithTimeout(ctx, 3*time.Second)
+	defer cancel()
+
+	res, err := db.ExecContext(opCtx, query, lockKey, s.lockID)
+	if err != nil {
+		return fmt.Errorf("release lock failed: %w", err)
 	}

-	if res.RowsAffected == 0 {
+	count, err := res.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to count affected rows: %w", err)
+	}
+
+	if count == 0 {
 		slog.Warn("Application lock not held by this process, cannot release",
 			slog.Int64("process_id", s.processID),
 			slog.String("host_id", s.hostID),
@@ -225,6 +241,11 @@ func (s *AppLockService) Release(ctx context.Context) error {

 // renew tries to renew the lock, retrying up to renewRetries times (sleeping 1s between attempts).
 func (s *AppLockService) renew(ctx context.Context) error {
+	db, err := s.db.DB()
+	if err != nil {
+		return fmt.Errorf("failed to get DB connection: %w", err)
+	}
+
 	var lastErr error
 	for attempt := 1; attempt <= renewRetries; attempt++ {
 		now := time.Now()
@@ -246,42 +267,56 @@ func (s *AppLockService) renew(ctx context.Context) error {
 		switch s.db.Name() {
 		case "sqlite":
 			query = `
-				UPDATE kv
-				SET value = ?
-				WHERE key = ?
-				  AND json_extract(value, '$.lock_id') = ?
-				  AND json_extract(value, '$.expires_at') > ?
-			`
+UPDATE kv
+SET value = ?
+WHERE key = ?
+  AND json_extract(value, '$.lock_id') = ?
+  AND json_extract(value, '$.expires_at') > ?
+`
 		case "postgres":
 			query = `
-				UPDATE kv
-				SET value = $1
-				WHERE key = $2
-				  AND value::json->>'lock_id' = $3
-				  AND ((value::json->>'expires_at')::bigint > $4)
-			`
+UPDATE kv
+SET value = $1
+WHERE key = $2
+  AND value::json->>'lock_id' = $3
+  AND ((value::json->>'expires_at')::bigint > $4)
+`
 		default:
 			return fmt.Errorf("unsupported database dialect: %s", s.db.Name())
 		}

 		opCtx, cancel := context.WithTimeout(ctx, 3*time.Second)
-		res := s.db.WithContext(opCtx).Exec(query, raw, lockKey, s.lockID, nowUnix)
+		res, err := db.ExecContext(opCtx, query, raw, lockKey, s.lockID, nowUnix)
 		cancel()

-		switch {
-		case res.Error != nil:
-			lastErr = fmt.Errorf("lock renewal failed: %w", res.Error)
-		case res.RowsAffected == 0:
-			// Must be after checking res.Error
-			return ErrLockLost
-		default:
+		// Query succeeded, but may have updated 0 rows
+		if err == nil {
+			count, err := res.RowsAffected()
+			if err != nil {
+				return fmt.Errorf("failed to count affected rows: %w", err)
+			}
+
+			// If no rows were updated, we lost the lock
+			if count == 0 {
+				return ErrLockLost
+			}
+
+			// All good
 			slog.Debug("Renewed application lock",
 				slog.Int64("process_id", s.processID),
 				slog.String("host_id", s.hostID),
+				slog.Duration("duration", time.Since(now)),
 			)
 			return nil
 		}

+		// If we're here, we have an error that can be retried
+		slog.Debug("Application lock renewal attempt failed",
+			slog.Any("error", err),
+			slog.Duration("duration", time.Since(now)),
+		)
+		lastErr = fmt.Errorf("lock renewal failed: %w", err)
+
 		// Wait before next attempt or cancel if context is done
 		if attempt < renewRetries {
 			select {
--- a/backend/internal/service/app_lock_service_test.go
+++ b/backend/internal/service/app_lock_service_test.go
@@ -49,6 +49,23 @@ func readLockValue(t *testing.T, db *gorm.DB) lockValue {
 	return value
 }

+func lockDatabaseForWrite(t *testing.T, db *gorm.DB) *gorm.DB {
+	t.Helper()
+
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+
+	// Keep a write transaction open to block other queries.
+	err := tx.Exec(
+		`INSERT INTO kv (key, value) VALUES (?, ?) ON CONFLICT(key) DO NOTHING`,
+		lockKey,
+		`{"expires_at":0}`,
+	).Error
+	require.NoError(t, err)
+
+	return tx
+}
+
 func TestAppLockServiceAcquire(t *testing.T) {
 	t.Run("creates new lock when none exists", func(t *testing.T) {
 		db := testutils.NewDatabaseForTest(t)
@@ -99,6 +116,66 @@ func TestAppLockServiceAcquire(t *testing.T) {
 		require.Equal(t, service.hostID, stored.HostID)
 		require.Greater(t, stored.ExpiresAt, time.Now().Unix())
 	})
+
+	t.Run("force acquisition returns wait duration when stealing active lock", func(t *testing.T) {
+		db := testutils.NewDatabaseForTest(t)
+		service := newTestAppLockService(t, db)
+
+		existing := lockValue{
+			ProcessID: 99,
+			HostID:    "other-host",
+			LockID:    "other-lock-id",
+			ExpiresAt: time.Now().Add(ttl).Unix(),
+		}
+		insertLock(t, db, existing)
+
+		waitUntil, err := service.Acquire(context.Background(), true)
+		require.NoError(t, err)
+		require.WithinDuration(t, time.Unix(existing.ExpiresAt, 0), waitUntil, time.Second)
+	})
+
+	t.Run("force acquisition does not wait when lock id is unchanged", func(t *testing.T) {
+		db := testutils.NewDatabaseForTest(t)
+		service := newTestAppLockService(t, db)
+
+		insertLock(t, db, lockValue{
+			ProcessID: 99,
+			HostID:    "other-host",
+			LockID:    service.lockID,
+			ExpiresAt: time.Now().Add(ttl).Unix(),
+		})
+
+		waitUntil, err := service.Acquire(context.Background(), true)
+		require.NoError(t, err)
+		require.True(t, waitUntil.IsZero())
+	})
+
+	t.Run("returns error when existing lock value is invalid JSON", func(t *testing.T) {
+		db := testutils.NewDatabaseForTest(t)
+		service := newTestAppLockService(t, db)
+
+		raw := "this-is-not-json"
+		err := db.Create(&model.KV{Key: lockKey, Value: &raw}).Error
+		require.NoError(t, err)
+
+		_, err = service.Acquire(context.Background(), false)
+		require.ErrorContains(t, err, "decode existing lock value")
+	})
+
+	t.Run("returns context deadline exceeded when database is locked", func(t *testing.T) {
+		db := testutils.NewDatabaseForTest(t)
+		service := newTestAppLockService(t, db)
+
+		tx := lockDatabaseForWrite(t, db)
+		defer tx.Rollback()
+
+		ctx, cancel := context.WithTimeout(context.Background(), 150*time.Millisecond)
+		defer cancel()
+
+		_, err := service.Acquire(ctx, false)
+		require.ErrorIs(t, err, context.DeadlineExceeded)
+		require.ErrorContains(t, err, "begin lock transaction")
+	})
 }

 func TestAppLockServiceRelease(t *testing.T) {
@@ -134,6 +211,24 @@ func TestAppLockServiceRelease(t *testing.T) {
 		stored := readLockValue(t, db)
 		require.Equal(t, existing, stored)
 	})
+
+	t.Run("returns context deadline exceeded when database is locked", func(t *testing.T) {
+		db := testutils.NewDatabaseForTest(t)
+		service := newTestAppLockService(t, db)
+
+		_, err := service.Acquire(context.Background(), false)
+		require.NoError(t, err)
+
+		tx := lockDatabaseForWrite(t, db)
+		defer tx.Rollback()
+
+		ctx, cancel := context.WithTimeout(context.Background(), 150*time.Millisecond)
+		defer cancel()
+
+		err = service.Release(ctx)
+		require.ErrorIs(t, err, context.DeadlineExceeded)
+		require.ErrorContains(t, err, "release lock failed")
+	})
 }

 func TestAppLockServiceRenew(t *testing.T) {
@@ -186,4 +281,21 @@ func TestAppLockServiceRenew(t *testing.T) {
 		err = service.renew(context.Background())
 		require.ErrorIs(t, err, ErrLockLost)
 	})
+
+	t.Run("returns context deadline exceeded when database is locked", func(t *testing.T) {
+		db := testutils.NewDatabaseForTest(t)
+		service := newTestAppLockService(t, db)
+
+		_, err := service.Acquire(context.Background(), false)
+		require.NoError(t, err)
+
+		tx := lockDatabaseForWrite(t, db)
+		defer tx.Rollback()
+
+		ctx, cancel := context.WithTimeout(context.Background(), 150*time.Millisecond)
+		defer cancel()
+
+		err = service.renew(ctx)
+		require.ErrorIs(t, err, context.DeadlineExceeded)
+	})
 }
--- a/backend/internal/service/e2etest_service.go
+++ b/backend/internal/service/e2etest_service.go
@@ -80,30 +80,32 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 				Base: model.Base{
 					ID: "f4b89dc2-62fb-46bf-9f5f-c34f4eafe93e",
 				},
-				Username:    "tim",
-				Email:       utils.Ptr("tim.cook@test.com"),
-				FirstName:   "Tim",
-				LastName:    "Cook",
-				DisplayName: "Tim Cook",
-				IsAdmin:     true,
+				Username:      "tim",
+				Email:         new("tim.cook@test.com"),
+				EmailVerified: true,
+				FirstName:     "Tim",
+				LastName:      "Cook",
+				DisplayName:   "Tim Cook",
+				IsAdmin:       true,
 			},
 			{
 				Base: model.Base{
 					ID: "1cd19686-f9a6-43f4-a41f-14a0bf5b4036",
 				},
-				Username:    "craig",
-				Email:       utils.Ptr("craig.federighi@test.com"),
-				FirstName:   "Craig",
-				LastName:    "Federighi",
-				DisplayName: "Craig Federighi",
-				IsAdmin:     false,
+				Username:      "craig",
+				Email:         new("craig.federighi@test.com"),
+				EmailVerified: false,
+				FirstName:     "Craig",
+				LastName:      "Federighi",
+				DisplayName:   "Craig Federighi",
+				IsAdmin:       false,
 			},
 			{
 				Base: model.Base{
 					ID: "d9256384-98ad-49a7-bc58-99ad0b4dc23c",
 				},
 				Username:    "eddy",
-				Email:       utils.Ptr("eddy.cue@test.com"),
+				Email:       new("eddy.cue@test.com"),
 				FirstName:   "Eddy",
 				LastName:    "Cue",
 				DisplayName: "Eddy Cue",
@@ -169,12 +171,12 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 					ID: "3654a746-35d4-4321-ac61-0bdcff2b4055",
 				},
 				Name:               "Nextcloud",
-				LaunchURL:          utils.Ptr("https://nextcloud.local"),
+				LaunchURL:          new("https://nextcloud.local"),
 				Secret:             "$2a$10$9dypwot8nGuCjT6wQWWpJOckZfRprhe2EkwpKizxS/fpVHrOLEJHC", // w2mUeZISmEvIDMEDvpY0PnxQIpj1m3zY
 				CallbackURLs:       model.UrlList{"http://nextcloud/auth/callback"},
 				LogoutCallbackURLs: model.UrlList{"http://nextcloud/auth/logout/callback"},
-				ImageType:          utils.StringPointer("png"),
-				CreatedByID:        utils.Ptr(users[0].ID),
+				ImageType:          new("png"),
+				CreatedByID:        new(users[0].ID),
 			},
 			{
 				Base: model.Base{
@@ -183,7 +185,7 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 				Name:              "Immich",
 				Secret:            "$2a$10$Ak.FP8riD1ssy2AGGbG.gOpnp/rBpymd74j0nxNMtW0GG1Lb4gzxe", // PYjrE9u4v9GVqXKi52eur0eb2Ci4kc0x
 				CallbackURLs:      model.UrlList{"http://immich/auth/callback"},
-				CreatedByID:       utils.Ptr(users[1].ID),
+				CreatedByID:       new(users[1].ID),
 				IsGroupRestricted: true,
 				AllowedUserGroups: []model.UserGroup{
 					userGroups[1],
@@ -198,7 +200,7 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 				CallbackURLs:       model.UrlList{"http://tailscale/auth/callback"},
 				LogoutCallbackURLs: model.UrlList{"http://tailscale/auth/logout/callback"},
 				IsGroupRestricted:  true,
-				CreatedByID:        utils.Ptr(users[0].ID),
+				CreatedByID:        new(users[0].ID),
 			},
 			{
 				Base: model.Base{
@@ -207,7 +209,7 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 				Name:              "Federated",
 				Secret:            "$2a$10$Ak.FP8riD1ssy2AGGbG.gOpnp/rBpymd74j0nxNMtW0GG1Lb4gzxe", // PYjrE9u4v9GVqXKi52eur0eb2Ci4kc0x
 				CallbackURLs:      model.UrlList{"http://federated/auth/callback"},
-				CreatedByID:       utils.Ptr(users[1].ID),
+				CreatedByID:       new(users[1].ID),
 				AllowedUserGroups: []model.UserGroup{},
 				Credentials: model.OidcClientCredentials{
 					FederatedIdentities: []model.OidcClientFederatedIdentity{
@@ -227,7 +229,7 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 				Name:              "SCIM Client",
 				Secret:            "$2a$10$h4wfa8gI7zavDAxwzSq1sOwYU4e8DwK1XZ8ZweNnY5KzlJ3Iz.qdK", // nQbiuMRG7FpdK2EnDd5MBivWQeKFXohn
 				CallbackURLs:      model.UrlList{"http://scimclient/auth/callback"},
-				CreatedByID:       utils.Ptr(users[0].ID),
+				CreatedByID:       new(users[0].ID),
 				IsGroupRestricted: true,
 				AllowedUserGroups: []model.UserGroup{
 					userGroups[0],
@@ -256,7 +258,7 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 				Nonce:     "nonce",
 				ExpiresAt: datatype.DateTime(time.Now().Add(1 * time.Hour)),
 				UserID:    users[1].ID,
-				ClientID:  oidcClients[2].ID,
+				ClientID:  oidcClients[3].ID,
 			},
 		}
 		for _, authCode := range authCodes {
@@ -354,17 +356,30 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 			return err
 		}

-		apiKey := model.ApiKey{
-			Base: model.Base{
-				ID: "5f1fa856-c164-4295-961e-175a0d22d725",
+		apiKeys := []model.ApiKey{
+			{
+				Base: model.Base{
+					ID: "5f1fa856-c164-4295-961e-175a0d22d725",
+				},
+				Name:      "Test API Key",
+				Key:       "6c34966f57ef2bb7857649aff0e7ab3ad67af93c846342ced3f5a07be8706c20",
+				UserID:    users[0].ID,
+				ExpiresAt: datatype.DateTime(time.Now().Add(30 * 24 * time.Hour)),
+			},
+			{
+				Base: model.Base{
+					ID: "98900330-7a7b-48fe-881b-2cc6ad049976",
+				},
+				Name:      "Expired API Key",
+				Key:       "141ff8ac9db640ba93630099de83d0ead8e7ac673e3a7d31b4fd7ff2252e6389",
+				UserID:    users[0].ID,
+				ExpiresAt: datatype.DateTime(time.Now().Add(-20 * 24 * time.Hour)),
 			},
-			Name:      "Test API Key",
-			Key:       "6c34966f57ef2bb7857649aff0e7ab3ad67af93c846342ced3f5a07be8706c20",
-			UserID:    users[0].ID,
-			ExpiresAt: datatype.DateTime(time.Now().Add(30 * 24 * time.Hour)),
 		}
-		if err := tx.Create(&apiKey).Error; err != nil {
-			return err
+		for _, apiKey := range apiKeys {
+			if err := tx.Create(&apiKey).Error; err != nil {
+				return err
+			}
 		}

 		signupTokens := []model.SignupToken{
@@ -414,11 +429,36 @@ func (s *TestService) SeedDatabase(baseURL string) error {
 			}
 		}

+		emailVerificationTokens := []model.EmailVerificationToken{
+			{
+				Base: model.Base{
+					ID: "ef9ca469-b178-4857-bd39-26639dca45de",
+				},
+				Token:     "2FZFSoupBdHyqIL65bWTsgCgHIhxlXup",
+				ExpiresAt: datatype.DateTime(time.Now().Add(2 * time.Hour)),
+				UserID:    users[1].ID,
+			},
+			{
+				Base: model.Base{
+					ID: "a3dcb4d2-7f3c-4e8a-9f4d-5b6c7d8e9f00",
+				},
+				Token:     "EXPIRED1234567890ABCDE",
+				ExpiresAt: datatype.DateTime(time.Now().Add(-1 * time.Hour)),
+				UserID:    users[1].ID,
+			},
+		}
+
+		for _, token := range emailVerificationTokens {
+			if err := tx.Create(&token).Error; err != nil {
+				return err
+			}
+		}
+
 		keyValues := []model.KV{
 			{
 				Key: jwkutils.PrivateKeyDBKey,
 				// {"alg":"RS256","d":"mvMDWSdPPvcum0c0iEHE2gbqtV2NKMmLwrl9E6K7g8lTV95SePLnW_bwyMPV7EGp7PQk3l17I5XRhFjze7GqTnFIOgKzMianPs7jv2ELtBMGK0xOPATgu1iGb70xZ6vcvuEfRyY3dJ0zr4jpUdVuXwKmx9rK4IdZn2dFCKfvSuspqIpz11RhF1ALrqDLkxGVv7ZwNh0_VhJZU9hcjG5l6xc7rQEKpPRkZp0IdjkGS8Z0FskoVaiRIWAbZuiVFB9WCW8k1czC4HQTPLpII01bUQx2ludbm0UlXRgVU9ptUUbU7GAImQqTOW8LfPGklEvcgzlIlR_oqw4P9yBxLi-yMQ","dp":"pvNCSnnhbo8Igw9psPR-DicxFnkXlu_ix4gpy6efTrxA-z1VDFDioJ814vKQNioYDzpyAP1gfMPhRkvG_q0hRZsJah3Sb9dfA-WkhSWY7lURQP4yIBTMU0PF_rEATuS7lRciYk1SOx5fqXZd3m_LP0vpBC4Ujlq6NAq6CIjCnms","dq":"TtUVGCCkPNgfOLmkYXu7dxxUCV5kB01-xAEK2OY0n0pG8vfDophH4_D_ZC7nvJ8J9uDhs_3JStexq1lIvaWtG99RNTChIEDzpdn6GH9yaVcb_eB4uJjrNm64FhF8PGCCwxA-xMCZMaARKwhMB2_IOMkxUbWboL3gnhJ2rDO_QO0","e":"AQAB","kid":"8uHDw3M6rf8","kty":"RSA","n":"yaeEL0VKoPBXIAaWXsUgmu05lAvEIIdJn0FX9lHh4JE5UY9B83C5sCNdhs9iSWzpeP11EVjWp8i3Yv2CF7c7u50BXnVBGtxpZpFC-585UXacoJ0chUmarL9GRFJcM1nPHBTFu68aRrn1rIKNHUkNaaxFo0NFGl_4EDDTO8HwawTjwkPoQlRzeByhlvGPVvwgB3Fn93B8QJ_cZhXKxJvjjrC_8Pk76heC_ntEMru71Ix77BoC3j2TuyiN7m9RNBW8BU5q6lKoIdvIeZfTFLzi37iufyfvMrJTixp9zhNB1NxlLCeOZl2MXegtiGqd2H3cbAyqoOiv9ihUWTfXj7SxJw","p":"_Yylc9e07CKdqNRD2EosMC2mrhrEa9j5oY_l00Qyy4-jmCA59Q9viyqvveRo0U7cRvFA5BWgWN6GGLh1DG3X-QBqVr0dnk3uzbobb55RYUXyPLuBZI2q6w2oasbiDwPdY7KpkVv_H-bpITQlyDvO8hhucA6rUV7F6KTQVz8M3Ms","q":"y5p3hch-7jJ21TkAhp_Vk1fLCAuD4tbErwQs2of9ja8sB4iJOs5Wn6HD3P7Mc8Plye7qaLHvzc8I5g0tPKWvC0DPd_FLPXiWwMVAzee3NUX_oGeJNOQp11y1w_KqdO9qZqHSEPZ3NcFL_SZMFgggxhM1uzRiPzsVN0lnD_6prZU","qi":"2Grt6uXHm61ji3xSdkBWNtUnj19vS1-7rFJp5SoYztVQVThf_W52BAiXKBdYZDRVoItC_VS2NvAOjeJjhYO_xQ_q3hK7MdtuXfEPpLnyXKkmWo3lrJ26wbeF6l05LexCkI7ShsOuSt-dsyaTJTszuKDIA6YOfWvfo3aVZmlWRaI","use":"sig"}
-				Value: utils.Ptr("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"),
+				Value: new("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"),
 			},
 		}

@@ -526,7 +566,7 @@ func (s *TestService) ResetAppConfig(ctx context.Context) error {
 	}

 	// Reload the JWK
-	if err := s.jwtService.LoadOrGenerateKey(); err != nil {
+	if err := s.jwtService.LoadOrGenerateKey(ctx); err != nil {
 		return err
 	}

--- a/backend/internal/service/email_service.go
+++ b/backend/internal/service/email_service.go
@@ -150,7 +150,8 @@ func SendEmail[V any](ctx context.Context, srv *EmailService, toEmail email.Addr
 	}

 	// Send the email
-	if err := srv.sendEmailContent(client, toEmail, c); err != nil {
+	err = srv.sendEmailContent(client, toEmail, c)
+	if err != nil {
 		return fmt.Errorf("send email content: %w", err)
 	}

--- a/backend/internal/service/email_service_templates.go
+++ b/backend/internal/service/email_service_templates.go
@@ -49,6 +49,13 @@ var ApiKeyExpiringSoonTemplate = email.Template[ApiKeyExpiringSoonTemplateData]{
 	},
 }

+var EmailVerificationTemplate = email.Template[EmailVerificationTemplateData]{
+	Path: "email-verification",
+	Title: func(data *email.TemplateData[EmailVerificationTemplateData]) string {
+		return "Verify your " + data.AppName + " email address"
+	},
+}
+
 type NewLoginTemplateData struct {
 	IPAddress string
 	Country   string
@@ -70,5 +77,10 @@ type ApiKeyExpiringSoonTemplateData struct {
 	ExpiresAt  time.Time
 }

+type EmailVerificationTemplateData struct {
+	UserFullName     string
+	VerificationLink string
+}
+
 // this is list of all template paths used for preloading templates
-var emailTemplatesPaths = []string{NewLoginTemplate.Path, OneTimeAccessTemplate.Path, TestTemplate.Path, ApiKeyExpiringSoonTemplate.Path}
+var emailTemplatesPaths = []string{NewLoginTemplate.Path, OneTimeAccessTemplate.Path, TestTemplate.Path, ApiKeyExpiringSoonTemplate.Path, EmailVerificationTemplate.Path}
--- a/backend/internal/service/export_service.go
+++ b/backend/internal/service/export_service.go
@@ -129,39 +129,39 @@ func (s *ExportService) getScanValuesForTable(cols []string, types utils.DBSchem
 		case "boolean", "bool":
 			var x bool
 			if types[col].Nullable {
-				res[i] = utils.Ptr(utils.Ptr(x))
+				res[i] = new(new(x))
 			} else {
-				res[i] = utils.Ptr(x)
+				res[i] = new(x)
 			}
 		case "blob", "bytea", "jsonb":
 			// Treat jsonb columns as binary too
 			var x []byte
 			if types[col].Nullable {
-				res[i] = utils.Ptr(utils.Ptr(x))
+				res[i] = new(new(x))
 			} else {
-				res[i] = utils.Ptr(x)
+				res[i] = new(x)
 			}
 		case "timestamp", "timestamptz", "timestamp with time zone", "datetime":
 			var x datatype.DateTime
 			if types[col].Nullable {
-				res[i] = utils.Ptr(utils.Ptr(x))
+				res[i] = new(new(x))
 			} else {
-				res[i] = utils.Ptr(x)
+				res[i] = new(x)
 			}
 		case "integer", "int", "bigint":
 			var x int64
 			if types[col].Nullable {
-				res[i] = utils.Ptr(utils.Ptr(x))
+				res[i] = new(new(x))
 			} else {
-				res[i] = utils.Ptr(x)
+				res[i] = new(x)
 			}
 		default:
 			// Treat everything else as a string (including the "numeric" type)
 			var x string
 			if types[col].Nullable {
-				res[i] = utils.Ptr(utils.Ptr(x))
+				res[i] = new(new(x))
 			} else {
-				res[i] = utils.Ptr(x)
+				res[i] = new(x)
 			}
 		}
 	}
--- a/backend/internal/service/geolite_service.go
+++ b/backend/internal/service/geolite_service.go
@@ -2,6 +2,7 @@ package service

 import (
 	"archive/tar"
+	"bytes"
 	"compress/gzip"
 	"context"
 	"errors"
@@ -13,6 +14,7 @@ import (
 	"net/netip"
 	"os"
 	"path/filepath"
+	"strings"
 	"sync"
 	"time"

@@ -22,6 +24,8 @@ import (
 	"github.com/pocket-id/pocket-id/backend/internal/common"
 )

+const maxTotalSize = 300 * 1024 * 1024 // 300 MB limit for total decompressed size
+
 type GeoLiteService struct {
 	httpClient     *http.Client
 	disableUpdater bool
@@ -109,7 +113,11 @@ func (s *GeoLiteService) UpdateDatabase(parentCtx context.Context) error {
 	}

 	slog.Info("Updating GeoLite2 City database")
-	downloadUrl := fmt.Sprintf(common.EnvConfig.GeoLiteDBUrl, common.EnvConfig.MaxMindLicenseKey)
+
+	downloadUrl := common.EnvConfig.GeoLiteDBUrl
+	if strings.Contains(downloadUrl, "%s") {
+		downloadUrl = fmt.Sprintf(downloadUrl, common.EnvConfig.MaxMindLicenseKey)
+	}

 	ctx, cancel := context.WithTimeout(parentCtx, 10*time.Minute)
 	defer cancel()
@@ -151,7 +159,24 @@ func (s *GeoLiteService) isDatabaseUpToDate() bool {

 // extractDatabase extracts the database file from the tar.gz archive directly to the target location.
 func (s *GeoLiteService) extractDatabase(reader io.Reader) error {
-	gzr, err := gzip.NewReader(reader)
+	// Check for gzip magic number
+	buf := make([]byte, 2)
+	_, err := io.ReadFull(reader, buf)
+	if err != nil {
+		return fmt.Errorf("failed to read magic number: %w", err)
+	}
+
+	// Check if the file starts with the gzip magic number
+	// Gosec returns false positive for "G602: slice index out of range"
+	//nolint:gosec
+	isGzip := buf[0] == 0x1f && buf[1] == 0x8b
+
+	if !isGzip {
+		// If not gzip, assume it's a regular database file
+		return s.writeDatabaseFile(io.MultiReader(bytes.NewReader(buf), reader))
+	}
+
+	gzr, err := gzip.NewReader(io.MultiReader(bytes.NewReader(buf), reader))
 	if err != nil {
 		return fmt.Errorf("failed to create gzip reader: %w", err)
 	}
@@ -160,7 +185,6 @@ func (s *GeoLiteService) extractDatabase(reader io.Reader) error {
 	tarReader := tar.NewReader(gzr)

 	var totalSize int64
-	const maxTotalSize = 300 * 1024 * 1024 // 300 MB limit for total decompressed size

 	// Iterate over the files in the tar archive
 	for {
@@ -222,3 +246,47 @@ func (s *GeoLiteService) extractDatabase(reader io.Reader) error {

 	return errors.New("GeoLite2-City.mmdb not found in archive")
 }
+
+func (s *GeoLiteService) writeDatabaseFile(reader io.Reader) error {
+	baseDir := filepath.Dir(common.EnvConfig.GeoLiteDBPath)
+	tmpFile, err := os.CreateTemp(baseDir, "geolite.*.mmdb.tmp")
+	if err != nil {
+		return fmt.Errorf("failed to create temporary database file: %w", err)
+	}
+	defer tmpFile.Close()
+
+	// Limit the amount we read to maxTotalSize.
+	// We read one extra byte to detect if the source is larger than the limit.
+	limitReader := io.LimitReader(reader, maxTotalSize+1)
+
+	// Write the file contents directly to the temporary file
+	written, err := io.Copy(tmpFile, limitReader)
+	if err != nil {
+		os.Remove(tmpFile.Name())
+		return fmt.Errorf("failed to write database file: %w", err)
+	}
+
+	if written > maxTotalSize {
+		os.Remove(tmpFile.Name())
+		return errors.New("total database size exceeds maximum allowed limit")
+	}
+
+	// Validate the downloaded database file
+	if db, err := maxminddb.Open(tmpFile.Name()); err == nil {
+		db.Close()
+	} else {
+		os.Remove(tmpFile.Name())
+		return fmt.Errorf("failed to open downloaded database file: %w", err)
+	}
+
+	// Ensure atomic replacement of the old database file
+	s.mutex.Lock()
+	err = os.Rename(tmpFile.Name(), common.EnvConfig.GeoLiteDBPath)
+	s.mutex.Unlock()
+
+	if err != nil {
+		os.Remove(tmpFile.Name())
+		return fmt.Errorf("failed to replace database file: %w", err)
+	}
+	return nil
+}
--- a/backend/internal/service/jwt_service.go
+++ b/backend/internal/service/jwt_service.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"time"

+	"github.com/google/uuid"
 	"github.com/lestrrat-go/jwx/v3/jwa"
 	"github.com/lestrrat-go/jwx/v3/jwk"
 	"github.com/lestrrat-go/jwx/v3/jwt"
@@ -56,10 +57,10 @@ type JwtService struct {
 	jwksEncoded      []byte
 }

-func NewJwtService(db *gorm.DB, appConfigService *AppConfigService) (*JwtService, error) {
+func NewJwtService(ctx context.Context, db *gorm.DB, appConfigService *AppConfigService) (*JwtService, error) {
 	service := &JwtService{}

-	err := service.init(db, appConfigService, &common.EnvConfig)
+	err := service.init(ctx, db, appConfigService, &common.EnvConfig)
 	if err != nil {
 		return nil, err
 	}
@@ -67,16 +68,16 @@ func NewJwtService(db *gorm.DB, appConfigService *AppConfigService) (*JwtService
 	return service, nil
 }

-func (s *JwtService) init(db *gorm.DB, appConfigService *AppConfigService, envConfig *common.EnvConfigSchema) (err error) {
+func (s *JwtService) init(ctx context.Context, db *gorm.DB, appConfigService *AppConfigService, envConfig *common.EnvConfigSchema) (err error) {
 	s.appConfigService = appConfigService
 	s.envConfig = envConfig
 	s.db = db

 	// Ensure keys are generated or loaded
-	return s.LoadOrGenerateKey()
+	return s.LoadOrGenerateKey(ctx)
 }

-func (s *JwtService) LoadOrGenerateKey() error {
+func (s *JwtService) LoadOrGenerateKey(ctx context.Context) error {
 	// Get the key provider
 	keyProvider, err := jwkutils.GetKeyProvider(s.db, s.envConfig, s.appConfigService.GetDbConfig().InstanceID.Value)
 	if err != nil {
@@ -84,7 +85,7 @@ func (s *JwtService) LoadOrGenerateKey() error {
 	}

 	// Try loading a key
-	key, err := keyProvider.LoadKey()
+	key, err := keyProvider.LoadKey(ctx)
 	if err != nil {
 		return fmt.Errorf("failed to load key: %w", err)
 	}
@@ -105,7 +106,7 @@ func (s *JwtService) LoadOrGenerateKey() error {
 	}

 	// Save the newly-generated key
-	err = keyProvider.SaveKey(s.privateKey)
+	err = keyProvider.SaveKey(ctx, s.privateKey)
 	if err != nil {
 		return fmt.Errorf("failed to save private key: %w", err)
 	}
@@ -193,6 +194,7 @@ func (s *JwtService) GenerateAccessToken(user model.User) (string, error) {
 		Expiration(now.Add(s.appConfigService.GetDbConfig().SessionDuration.AsDurationMinutes())).
 		IssuedAt(now).
 		Issuer(s.envConfig.AppURL).
+		JwtID(uuid.New().String()).
 		Build()
 	if err != nil {
 		return "", fmt.Errorf("failed to build token: %w", err)
@@ -247,6 +249,7 @@ func (s *JwtService) BuildIDToken(userClaims map[string]any, clientID string, no
 		Expiration(now.Add(1 * time.Hour)).
 		IssuedAt(now).
 		Issuer(s.envConfig.AppURL).
+		JwtID(uuid.New().String()).
 		Build()
 	if err != nil {
 		return nil, fmt.Errorf("failed to build token: %w", err)
@@ -336,6 +339,7 @@ func (s *JwtService) BuildOAuthAccessToken(user model.User, clientID string) (jw
 		Expiration(now.Add(1 * time.Hour)).
 		IssuedAt(now).
 		Issuer(s.envConfig.AppURL).
+		JwtID(uuid.New().String()).
 		Build()
 	if err != nil {
 		return nil, fmt.Errorf("failed to build token: %w", err)
--- a/backend/internal/service/jwt_service_test.go
+++ b/backend/internal/service/jwt_service_test.go
@@ -20,13 +20,14 @@ import (

 	"github.com/pocket-id/pocket-id/backend/internal/common"
 	"github.com/pocket-id/pocket-id/backend/internal/model"
-	"github.com/pocket-id/pocket-id/backend/internal/utils"
 	jwkutils "github.com/pocket-id/pocket-id/backend/internal/utils/jwk"
 	testutils "github.com/pocket-id/pocket-id/backend/internal/utils/testing"
 )

 const testEncryptionKey = "0123456789abcdef0123456789abcdef"

+const uuidRegexPattern = "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$"
+
 func newTestEnvConfig() *common.EnvConfigSchema {
 	return &common.EnvConfigSchema{
 		AppURL:        "https://test.example.com",
@@ -38,7 +39,7 @@ func initJwtService(t *testing.T, db *gorm.DB, appConfig *AppConfigService, envC
 	t.Helper()

 	service := &JwtService{}
-	err := service.init(db, appConfig, envConfig)
+	err := service.init(t.Context(), db, appConfig, envConfig)
 	require.NoError(t, err, "Failed to initialize JWT service")

 	return service
@@ -65,7 +66,7 @@ func saveKeyToDatabase(t *testing.T, db *gorm.DB, envConfig *common.EnvConfigSch
 	keyProvider, err := jwkutils.GetKeyProvider(db, envConfig, appConfig.GetDbConfig().InstanceID.Value)
 	require.NoError(t, err, "Failed to init key provider")

-	err = keyProvider.SaveKey(key)
+	err = keyProvider.SaveKey(t.Context(), key)
 	require.NoError(t, err, "Failed to save key")

 	kid, ok := key.KeyID()
@@ -93,7 +94,7 @@ func TestJwtService_Init(t *testing.T) {
 		// Verify the key has been persisted in the database
 		keyProvider, err := jwkutils.GetKeyProvider(db, mockEnvConfig, mockConfig.GetDbConfig().InstanceID.Value)
 		require.NoError(t, err, "Failed to init key provider")
-		key, err := keyProvider.LoadKey()
+		key, err := keyProvider.LoadKey(t.Context())
 		require.NoError(t, err, "Failed to load key from provider")
 		require.NotNil(t, key, "Key should be present in the database")

@@ -303,7 +304,7 @@ func TestGenerateVerifyAccessToken(t *testing.T) {

 		user := model.User{
 			Base:    model.Base{ID: "user123"},
-			Email:   utils.Ptr("user@example.com"),
+			Email:   new("user@example.com"),
 			IsAdmin: false,
 		}

@@ -323,6 +324,9 @@ func TestGenerateVerifyAccessToken(t *testing.T) {
 		audience, ok := claims.Audience()
 		_ = assert.True(t, ok, "Audience not found in token") &&
 			assert.Equal(t, []string{service.envConfig.AppURL}, audience, "Audience should contain the app URL")
+		jwtID, ok := claims.JwtID()
+		_ = assert.True(t, ok, "JWT ID not found in token") &&
+			assert.Regexp(t, uuidRegexPattern, jwtID, "JWT ID is not a UUID")

 		expectedExp := time.Now().Add(1 * time.Hour)
 		expiration, ok := claims.Expiration()
@@ -336,7 +340,7 @@ func TestGenerateVerifyAccessToken(t *testing.T) {

 		adminUser := model.User{
 			Base:    model.Base{ID: "admin123"},
-			Email:   utils.Ptr("admin@example.com"),
+			Email:   new("admin@example.com"),
 			IsAdmin: true,
 		}

@@ -388,7 +392,7 @@ func TestGenerateVerifyAccessToken(t *testing.T) {

 		user := model.User{
 			Base:    model.Base{ID: "eddsauser123"},
-			Email:   utils.Ptr("eddsauser@example.com"),
+			Email:   new("eddsauser@example.com"),
 			IsAdmin: true,
 		}

@@ -425,7 +429,7 @@ func TestGenerateVerifyAccessToken(t *testing.T) {

 		user := model.User{
 			Base:    model.Base{ID: "ecdsauser123"},
-			Email:   utils.Ptr("ecdsauser@example.com"),
+			Email:   new("ecdsauser@example.com"),
 			IsAdmin: true,
 		}

@@ -462,7 +466,7 @@ func TestGenerateVerifyAccessToken(t *testing.T) {

 		user := model.User{
 			Base:    model.Base{ID: "rsauser123"},
-			Email:   utils.Ptr("rsauser@example.com"),
+			Email:   new("rsauser@example.com"),
 			IsAdmin: true,
 		}

@@ -497,7 +501,7 @@ func TestGenerateVerifyIdToken(t *testing.T) {
 	t.Run("generates and verifies ID token with standard claims", func(t *testing.T) {
 		service, _, _ := setupJwtService(t, mockConfig)

-		userClaims := map[string]interface{}{
+		userClaims := map[string]any{
 			"sub":   "user123",
 			"name":  "Test User",
 			"email": "user@example.com",
@@ -520,6 +524,9 @@ func TestGenerateVerifyIdToken(t *testing.T) {
 		issuer, ok := claims.Issuer()
 		_ = assert.True(t, ok, "Issuer not found in token") &&
 			assert.Equal(t, service.envConfig.AppURL, issuer, "Issuer should match app URL")
+		jwtID, ok := claims.JwtID()
+		_ = assert.True(t, ok, "JWT ID not found in token") &&
+			assert.Regexp(t, uuidRegexPattern, jwtID, "JWT ID is not a UUID")

 		expectedExp := time.Now().Add(1 * time.Hour)
 		expiration, ok := claims.Expiration()
@@ -531,7 +538,7 @@ func TestGenerateVerifyIdToken(t *testing.T) {
 	t.Run("can accept expired tokens if told so", func(t *testing.T) {
 		service, _, _ := setupJwtService(t, mockConfig)

-		userClaims := map[string]interface{}{
+		userClaims := map[string]any{
 			"sub":   "user123",
 			"name":  "Test User",
 			"email": "user@example.com",
@@ -579,7 +586,7 @@ func TestGenerateVerifyIdToken(t *testing.T) {
 	t.Run("generates and verifies ID token with nonce", func(t *testing.T) {
 		service, _, _ := setupJwtService(t, mockConfig)

-		userClaims := map[string]interface{}{
+		userClaims := map[string]any{
 			"sub":  "user456",
 			"name": "Another User",
 		}
@@ -604,7 +611,7 @@ func TestGenerateVerifyIdToken(t *testing.T) {
 	t.Run("fails verification with incorrect issuer", func(t *testing.T) {
 		service, _, _ := setupJwtService(t, mockConfig)

-		userClaims := map[string]interface{}{
+		userClaims := map[string]any{
 			"sub": "user789",
 		}
 		tokenString, err := service.GenerateIDToken(userClaims, "client-789", "")
@@ -626,7 +633,7 @@ func TestGenerateVerifyIdToken(t *testing.T) {
 		require.True(t, ok)
 		assert.Equal(t, origKeyID, loadedKeyID, "Loaded key should have the same ID as the original")

-		userClaims := map[string]interface{}{
+		userClaims := map[string]any{
 			"sub":   "eddsauser456",
 			"name":  "EdDSA User",
 			"email": "eddsauser@example.com",
@@ -664,7 +671,7 @@ func TestGenerateVerifyIdToken(t *testing.T) {
 		require.True(t, ok)
 		assert.Equal(t, origKeyID, loadedKeyID, "Loaded key should have the same ID as the original")

-		userClaims := map[string]interface{}{
+		userClaims := map[string]any{
 			"sub":   "ecdsauser456",
 			"email": "ecdsauser@example.com",
 		}
@@ -701,7 +708,7 @@ func TestGenerateVerifyIdToken(t *testing.T) {
 		require.True(t, ok)
 		assert.Equal(t, origKeyID, loadedKeyID, "Loaded key should have the same ID as the original")

-		userClaims := map[string]interface{}{
+		userClaims := map[string]any{
 			"sub":   "rsauser456",
 			"name":  "RSA User",
 			"email": "rsauser@example.com",
@@ -734,7 +741,7 @@ func TestGenerateVerifyOAuthAccessToken(t *testing.T) {

 		user := model.User{
 			Base:  model.Base{ID: "user123"},
-			Email: utils.Ptr("user@example.com"),
+			Email: new("user@example.com"),
 		}
 		const clientID = "test-client-123"

@@ -754,6 +761,9 @@ func TestGenerateVerifyOAuthAccessToken(t *testing.T) {
 		issuer, ok := claims.Issuer()
 		_ = assert.True(t, ok, "Issuer not found in token") &&
 			assert.Equal(t, service.envConfig.AppURL, issuer, "Issuer should match app URL")
+		jwtID, ok := claims.JwtID()
+		_ = assert.True(t, ok, "JWT ID not found in token") &&
+			assert.Regexp(t, uuidRegexPattern, jwtID, "JWT ID is not a UUID")

 		expectedExp := time.Now().Add(1 * time.Hour)
 		expiration, ok := claims.Expiration()
@@ -814,7 +824,7 @@ func TestGenerateVerifyOAuthAccessToken(t *testing.T) {

 		user := model.User{
 			Base:  model.Base{ID: "eddsauser789"},
-			Email: utils.Ptr("eddsaoauth@example.com"),
+			Email: new("eddsaoauth@example.com"),
 		}
 		const clientID = "eddsa-oauth-client"

@@ -851,7 +861,7 @@ func TestGenerateVerifyOAuthAccessToken(t *testing.T) {

 		user := model.User{
 			Base:  model.Base{ID: "ecdsauser789"},
-			Email: utils.Ptr("ecdsaoauth@example.com"),
+			Email: new("ecdsaoauth@example.com"),
 		}
 		const clientID = "ecdsa-oauth-client"

@@ -888,7 +898,7 @@ func TestGenerateVerifyOAuthAccessToken(t *testing.T) {

 		user := model.User{
 			Base:  model.Base{ID: "rsauser789"},
-			Email: utils.Ptr("rsaoauth@example.com"),
+			Email: new("rsaoauth@example.com"),
 		}
 		const clientID = "rsa-oauth-client"

--- a/backend/internal/service/ldap_service.go
+++ b/backend/internal/service/ldap_service.go
@@ -35,6 +35,7 @@ type LdapService struct {
 	userService      *UserService
 	groupService     *UserGroupService
 	fileStorage      storage.FileStorage
+	clientFactory    func() (ldapClient, error)
 }

 type savePicture struct {
@@ -43,8 +44,33 @@ type savePicture struct {
 	picture  string
 }

+type ldapDesiredUser struct {
+	ldapID  string
+	input   dto.UserCreateDto
+	picture string
+}
+
+type ldapDesiredGroup struct {
+	ldapID          string
+	input           dto.UserGroupCreateDto
+	memberUsernames []string
+}
+
+type ldapDesiredState struct {
+	users    []ldapDesiredUser
+	userIDs  map[string]struct{}
+	groups   []ldapDesiredGroup
+	groupIDs map[string]struct{}
+}
+
+type ldapClient interface {
+	Search(searchRequest *ldap.SearchRequest) (*ldap.SearchResult, error)
+	Bind(username, password string) error
+	Close() error
+}
+
 func NewLdapService(db *gorm.DB, httpClient *http.Client, appConfigService *AppConfigService, userService *UserService, groupService *UserGroupService, fileStorage storage.FileStorage) *LdapService {
-	return &LdapService{
+	service := &LdapService{
 		db:               db,
 		httpClient:       httpClient,
 		appConfigService: appConfigService,
@@ -52,9 +78,12 @@ func NewLdapService(db *gorm.DB, httpClient *http.Client, appConfigService *AppC
 		groupService:     groupService,
 		fileStorage:      fileStorage,
 	}
+
+	service.clientFactory = service.createClient
+	return service
 }

-func (s *LdapService) createClient() (*ldap.Conn, error) {
+func (s *LdapService) createClient() (ldapClient, error) {
 	dbConfig := s.appConfigService.GetDbConfig()

 	if !dbConfig.LdapEnabled.IsTrue() {
@@ -79,24 +108,33 @@ func (s *LdapService) createClient() (*ldap.Conn, error) {

 func (s *LdapService) SyncAll(ctx context.Context) error {
 	// Setup LDAP connection
-	client, err := s.createClient()
+	client, err := s.clientFactory()
 	if err != nil {
 		return fmt.Errorf("failed to create LDAP client: %w", err)
 	}
 	defer client.Close()

-	// Start a transaction
-	tx := s.db.Begin()
-	defer func() {
-		tx.Rollback()
-	}()
+	// First, we fetch all users and group from LDAP, which is our "desired state"
+	desiredState, err := s.fetchDesiredState(ctx, client)
+	if err != nil {
+		return fmt.Errorf("failed to fetch LDAP state: %w", err)
+	}

-	savePictures, deleteFiles, err := s.SyncUsers(ctx, tx, client)
+	// Start a transaction
+	tx := s.db.WithContext(ctx).Begin()
+	if tx.Error != nil {
+		return fmt.Errorf("failed to begin database transaction: %w", tx.Error)
+	}
+	defer tx.Rollback()
+
+	// Reconcile users
+	savePictures, deleteFiles, err := s.reconcileUsers(ctx, tx, desiredState.users, desiredState.userIDs)
 	if err != nil {
 		return fmt.Errorf("failed to sync users: %w", err)
 	}

-	err = s.SyncGroups(ctx, tx, client)
+	// Reconcile groups
+	err = s.reconcileGroups(ctx, tx, desiredState.groups, desiredState.groupIDs)
 	if err != nil {
 		return fmt.Errorf("failed to sync groups: %w", err)
 	}
@@ -129,10 +167,59 @@ func (s *LdapService) SyncAll(ctx context.Context) error {
 	return nil
 }

-//nolint:gocognit
-func (s *LdapService) SyncGroups(ctx context.Context, tx *gorm.DB, client *ldap.Conn) error {
+func (s *LdapService) fetchDesiredState(ctx context.Context, client ldapClient) (ldapDesiredState, error) {
+	// Fetch users first so we can use their DNs when resolving group members
+	users, userIDs, usernamesByDN, err := s.fetchUsersFromLDAP(ctx, client)
+	if err != nil {
+		return ldapDesiredState{}, err
+	}
+
+	// Then fetch groups to complete the desired LDAP state snapshot
+	groups, groupIDs, err := s.fetchGroupsFromLDAP(ctx, client, usernamesByDN)
+	if err != nil {
+		return ldapDesiredState{}, err
+	}
+
+	// Apply user admin flags from the desired group membership snapshot.
+	// This intentionally uses the configured group member attribute rather than
+	// relying on a user-side reverse-membership attribute such as memberOf.
+	s.applyAdminGroupMembership(users, groups)
+
+	return ldapDesiredState{
+		users:    users,
+		userIDs:  userIDs,
+		groups:   groups,
+		groupIDs: groupIDs,
+	}, nil
+}
+
+func (s *LdapService) applyAdminGroupMembership(desiredUsers []ldapDesiredUser, desiredGroups []ldapDesiredGroup) {
+	dbConfig := s.appConfigService.GetDbConfig()
+	if dbConfig.LdapAdminGroupName.Value == "" {
+		return
+	}
+
+	adminUsernames := make(map[string]struct{})
+	for _, group := range desiredGroups {
+		if group.input.Name != dbConfig.LdapAdminGroupName.Value {
+			continue
+		}
+
+		for _, username := range group.memberUsernames {
+			adminUsernames[username] = struct{}{}
+		}
+	}
+
+	for i := range desiredUsers {
+		_, isAdmin := adminUsernames[desiredUsers[i].input.Username]
+		desiredUsers[i].input.IsAdmin = desiredUsers[i].input.IsAdmin || isAdmin
+	}
+}
+
+func (s *LdapService) fetchGroupsFromLDAP(ctx context.Context, client ldapClient, usernamesByDN map[string]string) (desiredGroups []ldapDesiredGroup, ldapGroupIDs map[string]struct{}, err error) {
 	dbConfig := s.appConfigService.GetDbConfig()

+	// Query LDAP for all groups we want to manage
 	searchAttrs := []string{
 		dbConfig.LdapAttributeGroupName.Value,
 		dbConfig.LdapAttributeGroupUniqueIdentifier.Value,
@@ -149,90 +236,42 @@ func (s *LdapService) SyncGroups(ctx context.Context, tx *gorm.DB, client *ldap.
 	)
 	result, err := client.Search(searchReq)
 	if err != nil {
-		return fmt.Errorf("failed to query LDAP: %w", err)
+		return nil, nil, fmt.Errorf("failed to query LDAP groups: %w", err)
 	}

-	// Create a mapping for groups that exist
-	ldapGroupIDs := make(map[string]struct{}, len(result.Entries))
+	// Build the in-memory desired state for groups
+	ldapGroupIDs = make(map[string]struct{}, len(result.Entries))
+	desiredGroups = make([]ldapDesiredGroup, 0, len(result.Entries))

 	for _, value := range result.Entries {
-		ldapId := convertLdapIdToString(value.GetAttributeValue(dbConfig.LdapAttributeGroupUniqueIdentifier.Value))
+		ldapID := convertLdapIdToString(value.GetAttributeValue(dbConfig.LdapAttributeGroupUniqueIdentifier.Value))

 		// Skip groups without a valid LDAP ID
-		if ldapId == "" {
+		if ldapID == "" {
 			slog.Warn("Skipping LDAP group without a valid unique identifier", slog.String("attribute", dbConfig.LdapAttributeGroupUniqueIdentifier.Value))
 			continue
 		}

-		ldapGroupIDs[ldapId] = struct{}{}
-
-		// Try to find the group in the database
-		var databaseGroup model.UserGroup
-		err = tx.
-			WithContext(ctx).
-			Where("ldap_id = ?", ldapId).
-			First(&databaseGroup).
-			Error
-		if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
-			// This could error with ErrRecordNotFound and we want to ignore that here
-			return fmt.Errorf("failed to query for LDAP group ID '%s': %w", ldapId, err)
-		}
+		ldapGroupIDs[ldapID] = struct{}{}

 		// Get group members and add to the correct Group
 		groupMembers := value.GetAttributeValues(dbConfig.LdapAttributeGroupMember.Value)
-		membersUserId := make([]string, 0, len(groupMembers))
+		memberUsernames := make([]string, 0, len(groupMembers))
 		for _, member := range groupMembers {
-			username := getDNProperty(dbConfig.LdapAttributeUserUsername.Value, member)
-
-			// If username extraction fails, try to query LDAP directly for the user
+			username := s.resolveGroupMemberUsername(ctx, client, member, usernamesByDN)
 			if username == "" {
-				// Query LDAP to get the user by their DN
-				userSearchReq := ldap.NewSearchRequest(
-					member,
-					ldap.ScopeBaseObject,
-					0, 0, 0, false,
-					"(objectClass=*)",
-					[]string{dbConfig.LdapAttributeUserUsername.Value, dbConfig.LdapAttributeUserUniqueIdentifier.Value},
-					[]ldap.Control{},
-				)
-
-				userResult, err := client.Search(userSearchReq)
-				if err != nil || len(userResult.Entries) == 0 {
-					slog.WarnContext(ctx, "Could not resolve group member DN", slog.String("member", member), slog.Any("error", err))
-					continue
-				}
-
-				username = userResult.Entries[0].GetAttributeValue(dbConfig.LdapAttributeUserUsername.Value)
-				if username == "" {
-					slog.WarnContext(ctx, "Could not extract username from group member DN", slog.String("member", member))
-					continue
-				}
-			}
-
-			username = norm.NFC.String(username)
-
-			var databaseUser model.User
-			err = tx.
-				WithContext(ctx).
-				Where("username = ? AND ldap_id IS NOT NULL", username).
-				First(&databaseUser).
-				Error
-			if errors.Is(err, gorm.ErrRecordNotFound) {
-				// The user collides with a non-LDAP user, so we skip it
 				continue
-			} else if err != nil {
-				return fmt.Errorf("failed to query for existing user '%s': %w", username, err)
 			}

-			membersUserId = append(membersUserId, databaseUser.ID)
+			memberUsernames = append(memberUsernames, username)
 		}

 		syncGroup := dto.UserGroupCreateDto{
 			Name:         value.GetAttributeValue(dbConfig.LdapAttributeGroupName.Value),
 			FriendlyName: value.GetAttributeValue(dbConfig.LdapAttributeGroupName.Value),
-			LdapID:       ldapId,
+			LdapID:       ldapID,
 		}
-		dto.Normalize(syncGroup)
+		dto.Normalize(&syncGroup)

 		err = syncGroup.Validate()
 		if err != nil {
@@ -240,66 +279,21 @@ func (s *LdapService) SyncGroups(ctx context.Context, tx *gorm.DB, client *ldap.
 			continue
 		}

-		if databaseGroup.ID == "" {
-			newGroup, err := s.groupService.createInternal(ctx, syncGroup, tx)
-			if err != nil {
-				return fmt.Errorf("failed to create group '%s': %w", syncGroup.Name, err)
-			}
-
-			_, err = s.groupService.updateUsersInternal(ctx, newGroup.ID, membersUserId, tx)
-			if err != nil {
-				return fmt.Errorf("failed to sync users for group '%s': %w", syncGroup.Name, err)
-			}
-		} else {
-			_, err = s.groupService.updateInternal(ctx, databaseGroup.ID, syncGroup, true, tx)
-			if err != nil {
-				return fmt.Errorf("failed to update group '%s': %w", syncGroup.Name, err)
-			}
-
-			_, err = s.groupService.updateUsersInternal(ctx, databaseGroup.ID, membersUserId, tx)
-			if err != nil {
-				return fmt.Errorf("failed to sync users for group '%s': %w", syncGroup.Name, err)
-			}
-		}
+		desiredGroups = append(desiredGroups, ldapDesiredGroup{
+			ldapID:          ldapID,
+			input:           syncGroup,
+			memberUsernames: memberUsernames,
+		})
 	}

-	// Get all LDAP groups from the database
-	var ldapGroupsInDb []model.UserGroup
-	err = tx.
-		WithContext(ctx).
-		Find(&ldapGroupsInDb, "ldap_id IS NOT NULL").
-		Select("ldap_id").
-		Error
-	if err != nil {
-		return fmt.Errorf("failed to fetch groups from database: %w", err)
-	}
-
-	// Delete groups that no longer exist in LDAP
-	for _, group := range ldapGroupsInDb {
-		if _, exists := ldapGroupIDs[*group.LdapID]; exists {
-			continue
-		}
-
-		err = tx.
-			WithContext(ctx).
-			Delete(&model.UserGroup{}, "ldap_id = ?", group.LdapID).
-			Error
-		if err != nil {
-			return fmt.Errorf("failed to delete group '%s': %w", group.Name, err)
-		}
-
-		slog.Info("Deleted group", slog.String("group", group.Name))
-	}
-
-	return nil
+	return desiredGroups, ldapGroupIDs, nil
 }

-//nolint:gocognit
-func (s *LdapService) SyncUsers(ctx context.Context, tx *gorm.DB, client *ldap.Conn) (savePictures []savePicture, deleteFiles []string, err error) {
+func (s *LdapService) fetchUsersFromLDAP(ctx context.Context, client ldapClient) (desiredUsers []ldapDesiredUser, ldapUserIDs map[string]struct{}, usernamesByDN map[string]string, err error) {
 	dbConfig := s.appConfigService.GetDbConfig()

+	// Query LDAP for all users we want to manage
 	searchAttrs := []string{
-		"memberOf",
 		"sn",
 		"cn",
 		dbConfig.LdapAttributeUserUniqueIdentifier.Value,
@@ -323,75 +317,48 @@ func (s *LdapService) SyncUsers(ctx context.Context, tx *gorm.DB, client *ldap.C

 	result, err := client.Search(searchReq)
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to query LDAP: %w", err)
+		return nil, nil, nil, fmt.Errorf("failed to query LDAP users: %w", err)
 	}

-	// Create a mapping for users that exist
-	ldapUserIDs := make(map[string]struct{}, len(result.Entries))
-	savePictures = make([]savePicture, 0, len(result.Entries))
+	// Build the in-memory desired state for users and a DN lookup for group membership resolution
+	ldapUserIDs = make(map[string]struct{}, len(result.Entries))
+	usernamesByDN = make(map[string]string, len(result.Entries))
+	desiredUsers = make([]ldapDesiredUser, 0, len(result.Entries))

 	for _, value := range result.Entries {
-		ldapId := convertLdapIdToString(value.GetAttributeValue(dbConfig.LdapAttributeUserUniqueIdentifier.Value))
+		username := norm.NFC.String(value.GetAttributeValue(dbConfig.LdapAttributeUserUsername.Value))
+		if normalizedDN := normalizeLDAPDN(value.DN); normalizedDN != "" && username != "" {
+			usernamesByDN[normalizedDN] = username
+		}
+
+		ldapID := convertLdapIdToString(value.GetAttributeValue(dbConfig.LdapAttributeUserUniqueIdentifier.Value))

 		// Skip users without a valid LDAP ID
-		if ldapId == "" {
+		if ldapID == "" {
 			slog.Warn("Skipping LDAP user without a valid unique identifier", slog.String("attribute", dbConfig.LdapAttributeUserUniqueIdentifier.Value))
 			continue
 		}

-		ldapUserIDs[ldapId] = struct{}{}
-
-		// Get the user from the database
-		var databaseUser model.User
-		err = tx.
-			WithContext(ctx).
-			Where("ldap_id = ?", ldapId).
-			First(&databaseUser).
-			Error
-
-		// If a user is found (even if disabled), enable them since they're now back in LDAP
-		if databaseUser.ID != "" && databaseUser.Disabled {
-			err = tx.
-				WithContext(ctx).
-				Model(&model.User{}).
-				Where("id = ?", databaseUser.ID).
-				Update("disabled", false).
-				Error
-
-			if err != nil {
-				return nil, nil, fmt.Errorf("failed to enable user %s: %w", databaseUser.Username, err)
-			}
-		}
-
-		if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
-			// This could error with ErrRecordNotFound and we want to ignore that here
-			return nil, nil, fmt.Errorf("failed to query for LDAP user ID '%s': %w", ldapId, err)
-		}
-
-		// Check if user is admin by checking if they are in the admin group
-		isAdmin := false
-		for _, group := range value.GetAttributeValues("memberOf") {
-			if getDNProperty(dbConfig.LdapAttributeGroupName.Value, group) == dbConfig.LdapAdminGroupName.Value {
-				isAdmin = true
-				break
-			}
-		}
+		ldapUserIDs[ldapID] = struct{}{}

 		newUser := dto.UserCreateDto{
-			Username:    value.GetAttributeValue(dbConfig.LdapAttributeUserUsername.Value),
-			Email:       utils.PtrOrNil(value.GetAttributeValue(dbConfig.LdapAttributeUserEmail.Value)),
-			FirstName:   value.GetAttributeValue(dbConfig.LdapAttributeUserFirstName.Value),
-			LastName:    value.GetAttributeValue(dbConfig.LdapAttributeUserLastName.Value),
-			DisplayName: value.GetAttributeValue(dbConfig.LdapAttributeUserDisplayName.Value),
-			IsAdmin:     isAdmin,
-			LdapID:      ldapId,
+			Username:      value.GetAttributeValue(dbConfig.LdapAttributeUserUsername.Value),
+			Email:         utils.PtrOrNil(value.GetAttributeValue(dbConfig.LdapAttributeUserEmail.Value)),
+			EmailVerified: true,
+			FirstName:     value.GetAttributeValue(dbConfig.LdapAttributeUserFirstName.Value),
+			LastName:      value.GetAttributeValue(dbConfig.LdapAttributeUserLastName.Value),
+			DisplayName:   value.GetAttributeValue(dbConfig.LdapAttributeUserDisplayName.Value),
+			// Admin status is computed after groups are loaded so it can use the
+			// configured group member attribute instead of a hard-coded memberOf.
+			IsAdmin: false,
+			LdapID:  ldapID,
 		}

 		if newUser.DisplayName == "" {
 			newUser.DisplayName = strings.TrimSpace(newUser.FirstName + " " + newUser.LastName)
 		}

-		dto.Normalize(newUser)
+		dto.Normalize(&newUser)

 		err = newUser.Validate()
 		if err != nil {
@@ -399,53 +366,201 @@ func (s *LdapService) SyncUsers(ctx context.Context, tx *gorm.DB, client *ldap.C
 			continue
 		}

-		userID := databaseUser.ID
-		if databaseUser.ID == "" {
-			createdUser, err := s.userService.createUserInternal(ctx, newUser, true, tx)
-			if errors.Is(err, &common.AlreadyInUseError{}) {
-				slog.Warn("Skipping creating LDAP user", slog.String("username", newUser.Username), slog.Any("error", err))
+		desiredUsers = append(desiredUsers, ldapDesiredUser{
+			ldapID:  ldapID,
+			input:   newUser,
+			picture: value.GetAttributeValue(dbConfig.LdapAttributeUserProfilePicture.Value),
+		})
+	}
+
+	return desiredUsers, ldapUserIDs, usernamesByDN, nil
+}
+
+func (s *LdapService) resolveGroupMemberUsername(ctx context.Context, client ldapClient, member string, usernamesByDN map[string]string) string {
+	dbConfig := s.appConfigService.GetDbConfig()
+
+	// First try the DN cache we built while loading users
+	username, exists := usernamesByDN[normalizeLDAPDN(member)]
+	if exists && username != "" {
+		return username
+	}
+
+	// Then try to extract the username directly from the DN
+	username = getDNProperty(dbConfig.LdapAttributeUserUsername.Value, member)
+	if username != "" {
+		return norm.NFC.String(username)
+	}
+
+	// As a fallback, query LDAP for the referenced entry
+	userSearchReq := ldap.NewSearchRequest(
+		member,
+		ldap.ScopeBaseObject,
+		0, 0, 0, false,
+		"(objectClass=*)",
+		[]string{dbConfig.LdapAttributeUserUsername.Value},
+		[]ldap.Control{},
+	)
+
+	userResult, err := client.Search(userSearchReq)
+	if err != nil || len(userResult.Entries) == 0 {
+		slog.WarnContext(ctx, "Could not resolve group member DN", slog.String("member", member), slog.Any("error", err))
+		return ""
+	}
+
+	username = userResult.Entries[0].GetAttributeValue(dbConfig.LdapAttributeUserUsername.Value)
+	if username == "" {
+		slog.WarnContext(ctx, "Could not extract username from group member DN", slog.String("member", member))
+		return ""
+	}
+
+	return norm.NFC.String(username)
+}
+
+func (s *LdapService) reconcileGroups(ctx context.Context, tx *gorm.DB, desiredGroups []ldapDesiredGroup, ldapGroupIDs map[string]struct{}) error {
+	// Load the current LDAP-managed state from the database
+	ldapGroupsInDB, ldapGroupsByID, err := s.loadLDAPGroupsInDB(ctx, tx)
+	if err != nil {
+		return fmt.Errorf("failed to fetch groups from database: %w", err)
+	}
+
+	_, _, ldapUsersByUsername, err := s.loadLDAPUsersInDB(ctx, tx)
+	if err != nil {
+		return fmt.Errorf("failed to fetch users from database: %w", err)
+	}
+
+	// Apply creates and updates to match the desired LDAP group state
+	for _, desiredGroup := range desiredGroups {
+		memberUserIDs := make([]string, 0, len(desiredGroup.memberUsernames))
+		for _, username := range desiredGroup.memberUsernames {
+			databaseUser, exists := ldapUsersByUsername[username]
+			if !exists {
+				// The user collides with a non-LDAP user or was skipped during user sync, so we ignore it
 				continue
-			} else if err != nil {
-				return nil, nil, fmt.Errorf("error creating user '%s': %w", newUser.Username, err)
-			}
-			userID = createdUser.ID
-		} else {
-			_, err = s.userService.updateUserInternal(ctx, databaseUser.ID, newUser, false, true, tx)
-			if errors.Is(err, &common.AlreadyInUseError{}) {
-				slog.Warn("Skipping updating LDAP user", slog.String("username", newUser.Username), slog.Any("error", err))
-				continue
-			} else if err != nil {
-				return nil, nil, fmt.Errorf("error updating user '%s': %w", newUser.Username, err)
 			}
+
+			memberUserIDs = append(memberUserIDs, databaseUser.ID)
 		}

-		// Save profile picture
-		pictureString := value.GetAttributeValue(dbConfig.LdapAttributeUserProfilePicture.Value)
-		if pictureString != "" {
-			// Storage operations must be executed outside of a transaction
-			savePictures = append(savePictures, savePicture{
-				userID:   databaseUser.ID,
-				username: userID,
-				picture:  pictureString,
-			})
+		databaseGroup := ldapGroupsByID[desiredGroup.ldapID]
+		if databaseGroup.ID == "" {
+			newGroup, err := s.groupService.createInternal(ctx, desiredGroup.input, tx)
+			if err != nil {
+				return fmt.Errorf("failed to create group '%s': %w", desiredGroup.input.Name, err)
+			}
+			ldapGroupsByID[desiredGroup.ldapID] = newGroup
+
+			_, err = s.groupService.updateUsersInternal(ctx, newGroup.ID, memberUserIDs, tx)
+			if err != nil {
+				return fmt.Errorf("failed to sync users for group '%s': %w", desiredGroup.input.Name, err)
+			}
+			continue
+		}
+
+		_, err = s.groupService.updateInternal(ctx, databaseGroup.ID, desiredGroup.input, true, tx)
+		if err != nil {
+			return fmt.Errorf("failed to update group '%s': %w", desiredGroup.input.Name, err)
+		}
+
+		_, err = s.groupService.updateUsersInternal(ctx, databaseGroup.ID, memberUserIDs, tx)
+		if err != nil {
+			return fmt.Errorf("failed to sync users for group '%s': %w", desiredGroup.input.Name, err)
 		}
 	}

-	// Get all LDAP users from the database
-	var ldapUsersInDb []model.User
-	err = tx.
-		WithContext(ctx).
-		Find(&ldapUsersInDb, "ldap_id IS NOT NULL").
-		Select("id, username, ldap_id, disabled").
-		Error
+	// Delete groups that are no longer present in LDAP
+	for _, group := range ldapGroupsInDB {
+		if group.LdapID == nil {
+			continue
+		}
+
+		if _, exists := ldapGroupIDs[*group.LdapID]; exists {
+			continue
+		}
+
+		err = tx.
+			WithContext(ctx).
+			Delete(&model.UserGroup{}, "ldap_id = ?", *group.LdapID).
+			Error
+		if err != nil {
+			return fmt.Errorf("failed to delete group '%s': %w", group.Name, err)
+		}
+
+		slog.Info("Deleted group", slog.String("group", group.Name))
+	}
+
+	return nil
+}
+
+//nolint:gocognit
+func (s *LdapService) reconcileUsers(ctx context.Context, tx *gorm.DB, desiredUsers []ldapDesiredUser, ldapUserIDs map[string]struct{}) (savePictures []savePicture, deleteFiles []string, err error) {
+	dbConfig := s.appConfigService.GetDbConfig()
+
+	// Load the current LDAP-managed state from the database
+	ldapUsersInDB, ldapUsersByID, _, err := s.loadLDAPUsersInDB(ctx, tx)
 	if err != nil {
 		return nil, nil, fmt.Errorf("failed to fetch users from database: %w", err)
 	}

-	// Mark users as disabled or delete users that no longer exist in LDAP
-	deleteFiles = make([]string, 0, len(ldapUserIDs))
-	for _, user := range ldapUsersInDb {
-		// Skip if the user ID exists in the fetched LDAP results
+	// Apply creates and updates to match the desired LDAP user state
+	savePictures = make([]savePicture, 0, len(desiredUsers))
+
+	for _, desiredUser := range desiredUsers {
+		databaseUser := ldapUsersByID[desiredUser.ldapID]
+
+		// If a user is found (even if disabled), enable them since they're now back in LDAP.
+		if databaseUser.ID != "" && databaseUser.Disabled {
+			err = tx.
+				WithContext(ctx).
+				Model(&model.User{}).
+				Where("id = ?", databaseUser.ID).
+				Update("disabled", false).
+				Error
+			if err != nil {
+				return nil, nil, fmt.Errorf("failed to enable user %s: %w", databaseUser.Username, err)
+			}
+
+			databaseUser.Disabled = false
+			ldapUsersByID[desiredUser.ldapID] = databaseUser
+		}
+
+		userID := databaseUser.ID
+		if databaseUser.ID == "" {
+			createdUser, err := s.userService.createUserInternal(ctx, desiredUser.input, true, tx)
+			if errors.Is(err, &common.AlreadyInUseError{}) {
+				slog.Warn("Skipping creating LDAP user", slog.String("username", desiredUser.input.Username), slog.Any("error", err))
+				continue
+			} else if err != nil {
+				return nil, nil, fmt.Errorf("error creating user '%s': %w", desiredUser.input.Username, err)
+			}
+
+			userID = createdUser.ID
+			ldapUsersByID[desiredUser.ldapID] = createdUser
+		} else {
+			_, err = s.userService.updateUserInternal(ctx, databaseUser.ID, desiredUser.input, false, true, tx)
+			if errors.Is(err, &common.AlreadyInUseError{}) {
+				slog.Warn("Skipping updating LDAP user", slog.String("username", desiredUser.input.Username), slog.Any("error", err))
+				continue
+			} else if err != nil {
+				return nil, nil, fmt.Errorf("error updating user '%s': %w", desiredUser.input.Username, err)
+			}
+		}
+
+		if desiredUser.picture != "" {
+			savePictures = append(savePictures, savePicture{
+				userID:   userID,
+				username: desiredUser.input.Username,
+				picture:  desiredUser.picture,
+			})
+		}
+	}
+
+	// Disable or delete users that are no longer present in LDAP
+	deleteFiles = make([]string, 0, len(ldapUsersInDB))
+	for _, user := range ldapUsersInDB {
+		if user.LdapID == nil {
+			continue
+		}
+
 		if _, exists := ldapUserIDs[*user.LdapID]; exists {
 			continue
 		}
@@ -457,29 +572,73 @@ func (s *LdapService) SyncUsers(ctx context.Context, tx *gorm.DB, client *ldap.C
 			}

 			slog.Info("Disabled user", slog.String("username", user.Username))
-		} else {
-			err = s.userService.deleteUserInternal(ctx, tx, user.ID, true)
-			if err != nil {
-				target := &common.LdapUserUpdateError{}
-				if errors.As(err, &target) {
-					return nil, nil, fmt.Errorf("failed to delete user %s: LDAP user must be disabled before deletion", user.Username)
-				}
-				return nil, nil, fmt.Errorf("failed to delete user %s: %w", user.Username, err)
-			}
-
-			slog.Info("Deleted user", slog.String("username", user.Username))
-
-			// Storage operations must be executed outside of a transaction
-			deleteFiles = append(deleteFiles, path.Join("profile-pictures", user.ID+".png"))
+			continue
 		}
+
+		err = s.userService.deleteUserInternal(ctx, tx, user.ID, true)
+		if err != nil {
+			target := &common.LdapUserUpdateError{}
+			if errors.As(err, &target) {
+				return nil, nil, fmt.Errorf("failed to delete user %s: LDAP user must be disabled before deletion", user.Username)
+			}
+			return nil, nil, fmt.Errorf("failed to delete user %s: %w", user.Username, err)
+		}
+
+		slog.Info("Deleted user", slog.String("username", user.Username))
+		deleteFiles = append(deleteFiles, path.Join("profile-pictures", user.ID+".png"))
 	}

 	return savePictures, deleteFiles, nil
 }

+func (s *LdapService) loadLDAPUsersInDB(ctx context.Context, tx *gorm.DB) (users []model.User, byLdapID map[string]model.User, byUsername map[string]model.User, err error) {
+	// Load all LDAP-managed users and index them by LDAP ID and by username
+	err = tx.
+		WithContext(ctx).
+		Select("id, username, ldap_id, disabled").
+		Where("ldap_id IS NOT NULL").
+		Find(&users).
+		Error
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	byLdapID = make(map[string]model.User, len(users))
+	byUsername = make(map[string]model.User, len(users))
+	for _, user := range users {
+		byLdapID[*user.LdapID] = user
+		byUsername[user.Username] = user
+	}
+
+	return users, byLdapID, byUsername, nil
+}
+
+func (s *LdapService) loadLDAPGroupsInDB(ctx context.Context, tx *gorm.DB) ([]model.UserGroup, map[string]model.UserGroup, error) {
+	var groups []model.UserGroup
+
+	// Load all LDAP-managed groups and index them by LDAP ID
+	err := tx.
+		WithContext(ctx).
+		Select("id, name, ldap_id").
+		Where("ldap_id IS NOT NULL").
+		Find(&groups).
+		Error
+	if err != nil {
+		return nil, nil, err
+	}
+
+	groupsByID := make(map[string]model.UserGroup, len(groups))
+	for _, group := range groups {
+		groupsByID[*group.LdapID] = group
+	}
+
+	return groups, groupsByID, nil
+}
+
 func (s *LdapService) saveProfilePicture(parentCtx context.Context, userId string, pictureString string) error {
 	var reader io.ReadSeeker

+	// Accept either a URL, a base64-encoded payload, or raw binary data
 	_, err := url.ParseRequestURI(pictureString)
 	if err == nil {
 		ctx, cancel := context.WithTimeout(parentCtx, 15*time.Second)
@@ -521,6 +680,31 @@ func (s *LdapService) saveProfilePicture(parentCtx context.Context, userId strin
 	return nil
 }

+// normalizeLDAPDN returns a canonical lowercase form of a DN for use as a map key.
+// Different LDAP servers may format the same DN with varying attribute type casing (e.g. "CN=" vs "cn=") or extra whitespace (e.g. "dc=example, dc=com").
+// Without normalization, cache lookups in usernamesByDN would miss when a member attribute value uses a different format than the DN returned in the search entry
+//
+// ldap.ParseDN is used instead of simple lowercasing because it correctly handles multi-valued RDNs (joined with "+") and strips inter-component whitespace.
+// If parsing fails for any reason, we fall back to a simple lowercase+trim.
+func normalizeLDAPDN(dn string) string {
+	parsed, err := ldap.ParseDN(dn)
+	if err != nil {
+		return strings.ToLower(strings.TrimSpace(dn))
+	}
+
+	// Reconstruct the DN in a canonical form: lowercase type=lowercase value, with RDN components separated by "," and multi-value attributes by "+"
+	parts := make([]string, 0, len(parsed.RDNs))
+	for _, rdn := range parsed.RDNs {
+		attrs := make([]string, 0, len(rdn.Attributes))
+		for _, attr := range rdn.Attributes {
+			attrs = append(attrs, strings.ToLower(attr.Type)+"="+strings.ToLower(attr.Value))
+		}
+		parts = append(parts, strings.Join(attrs, "+"))
+	}
+
+	return strings.Join(parts, ",")
+}
+
 // getDNProperty returns the value of a property from a LDAP identifier
 // See: https://learn.microsoft.com/en-us/previous-versions/windows/desktop/ldap/distinguished-names
 func getDNProperty(property string, str string) string {
@@ -528,7 +712,7 @@ func getDNProperty(property string, str string) string {
 	// First we split at the comma
 	property = strings.ToLower(property)
 	l := len(property) + 1
-	for _, v := range strings.Split(str, ",") {
+	for v := range strings.SplitSeq(str, ",") {
 		v = strings.TrimSpace(v)
 		if len(v) > l && strings.ToLower(v)[0:l] == property+"=" {
 			return v[l:]
--- a/backend/internal/service/ldap_service_test.go
+++ b/backend/internal/service/ldap_service_test.go
@@ -1,9 +1,368 @@
 package service

 import (
+	"net/http"
 	"testing"
+
+	"github.com/go-ldap/ldap/v3"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gorm.io/gorm"
+
+	"github.com/pocket-id/pocket-id/backend/internal/model"
+	"github.com/pocket-id/pocket-id/backend/internal/storage"
+	testutils "github.com/pocket-id/pocket-id/backend/internal/utils/testing"
 )

+type fakeLDAPClient struct {
+	searchFn func(searchRequest *ldap.SearchRequest) (*ldap.SearchResult, error)
+}
+
+func (c *fakeLDAPClient) Search(searchRequest *ldap.SearchRequest) (*ldap.SearchResult, error) {
+	if c.searchFn == nil {
+		return nil, nil
+	}
+
+	return c.searchFn(searchRequest)
+}
+
+func (c *fakeLDAPClient) Bind(_, _ string) error {
+	return nil
+}
+
+func (c *fakeLDAPClient) Close() error {
+	return nil
+}
+
+func TestLdapServiceSyncAllReconcilesUsersAndGroups(t *testing.T) {
+	service, db := newTestLdapService(t, newFakeLDAPClient(
+		ldapSearchResult(
+			ldapEntry("uid=alice,ou=people,dc=example,dc=com", map[string][]string{
+				"entryUUID":   {"u-alice"},
+				"uid":         {"alice"},
+				"mail":        {"alice@example.com"},
+				"givenName":   {"Alice"},
+				"sn":          {"Jones"},
+				"displayName": {""},
+			}),
+			ldapEntry("uid=bob,ou=people,dc=example,dc=com", map[string][]string{
+				"entryUUID":   {"u-bob"},
+				"uid":         {"bob"},
+				"mail":        {"bob@example.com"},
+				"givenName":   {"Bob"},
+				"sn":          {"Brown"},
+				"displayName": {""},
+			}),
+		),
+		ldapSearchResult(
+			ldapEntry("cn=admins,ou=groups,dc=example,dc=com", map[string][]string{
+				"entryUUID": {"g-admins"},
+				"cn":        {"admins"},
+				"member":    {"uid=alice,ou=people,dc=example,dc=com"},
+			}),
+			ldapEntry("cn=team,ou=groups,dc=example,dc=com", map[string][]string{
+				"entryUUID": {"g-team"},
+				"cn":        {"team"},
+				"member": {
+					"UID=Alice, OU=People, DC=example, DC=com",
+					"uid=bob, ou=people, dc=example, dc=com",
+				},
+			}),
+		),
+	))
+
+	aliceLdapID := "u-alice"
+	missingLdapID := "u-missing"
+	teamLdapID := "g-team"
+	oldGroupLdapID := "g-old"
+
+	require.NoError(t, db.Create(&model.User{
+		Username:      "alice-old",
+		Email:         new("alice-old@example.com"),
+		EmailVerified: true,
+		FirstName:     "Old",
+		LastName:      "Name",
+		DisplayName:   "Old Name",
+		LdapID:        &aliceLdapID,
+		Disabled:      true,
+	}).Error)
+
+	require.NoError(t, db.Create(&model.User{
+		Username:      "missing",
+		Email:         new("missing@example.com"),
+		EmailVerified: true,
+		FirstName:     "Missing",
+		LastName:      "User",
+		DisplayName:   "Missing User",
+		LdapID:        &missingLdapID,
+	}).Error)
+
+	require.NoError(t, db.Create(&model.UserGroup{
+		Name:         "team-old",
+		FriendlyName: "team-old",
+		LdapID:       &teamLdapID,
+	}).Error)
+
+	require.NoError(t, db.Create(&model.UserGroup{
+		Name:         "old-group",
+		FriendlyName: "old-group",
+		LdapID:       &oldGroupLdapID,
+	}).Error)
+
+	require.NoError(t, service.SyncAll(t.Context()))
+
+	var alice model.User
+	require.NoError(t, db.First(&alice, "ldap_id = ?", aliceLdapID).Error)
+	assert.Equal(t, "alice", alice.Username)
+	assert.Equal(t, new("alice@example.com"), alice.Email)
+	assert.Equal(t, "Alice", alice.FirstName)
+	assert.Equal(t, "Jones", alice.LastName)
+	assert.Equal(t, "Alice Jones", alice.DisplayName)
+	assert.True(t, alice.IsAdmin)
+	assert.False(t, alice.Disabled)
+
+	var bob model.User
+	require.NoError(t, db.First(&bob, "ldap_id = ?", "u-bob").Error)
+	assert.Equal(t, "bob", bob.Username)
+	assert.Equal(t, "Bob Brown", bob.DisplayName)
+
+	var missing model.User
+	require.NoError(t, db.First(&missing, "ldap_id = ?", missingLdapID).Error)
+	assert.True(t, missing.Disabled)
+
+	var oldGroupCount int64
+	require.NoError(t, db.Model(&model.UserGroup{}).Where("ldap_id = ?", oldGroupLdapID).Count(&oldGroupCount).Error)
+	assert.Zero(t, oldGroupCount)
+
+	var team model.UserGroup
+	require.NoError(t, db.Preload("Users").First(&team, "ldap_id = ?", teamLdapID).Error)
+	assert.Equal(t, "team", team.Name)
+	assert.Equal(t, "team", team.FriendlyName)
+	assert.ElementsMatch(t, []string{"alice", "bob"}, usernames(team.Users))
+}
+
+func TestLdapServiceSyncAllHandlesDuplicateLDAPIDsInSingleRun(t *testing.T) {
+	service, db := newTestLdapService(t, newFakeLDAPClient(
+		ldapSearchResult(
+			ldapEntry("uid=alice,ou=people,dc=example,dc=com", map[string][]string{
+				"entryUUID":   {"u-dup"},
+				"uid":         {"alice"},
+				"mail":        {"alice@example.com"},
+				"givenName":   {"Alice"},
+				"sn":          {"Doe"},
+				"displayName": {"Alice Doe"},
+			}),
+			ldapEntry("uid=alice,ou=people,dc=example,dc=com", map[string][]string{
+				"entryUUID":   {"u-dup"},
+				"uid":         {"alice"},
+				"mail":        {"alice@example.com"},
+				"givenName":   {"Alicia"},
+				"sn":          {"Doe"},
+				"displayName": {"Alicia Doe"},
+			}),
+		),
+		ldapSearchResult(
+			ldapEntry("cn=team,ou=groups,dc=example,dc=com", map[string][]string{
+				"entryUUID": {"g-dup"},
+				"cn":        {"team"},
+				"member":    {"uid=alice,ou=people,dc=example,dc=com"},
+			}),
+			ldapEntry("cn=team,ou=groups,dc=example,dc=com", map[string][]string{
+				"entryUUID": {"g-dup"},
+				"cn":        {"team-renamed"},
+				"member":    {"uid=alice,ou=people,dc=example,dc=com"},
+			}),
+		),
+	))
+
+	require.NoError(t, service.SyncAll(t.Context()))
+
+	var users []model.User
+	require.NoError(t, db.Find(&users, "ldap_id = ?", "u-dup").Error)
+	require.Len(t, users, 1)
+	assert.Equal(t, "alice", users[0].Username)
+	assert.Equal(t, "Alicia", users[0].FirstName)
+	assert.Equal(t, "Alicia Doe", users[0].DisplayName)
+
+	var groups []model.UserGroup
+	require.NoError(t, db.Preload("Users").Find(&groups, "ldap_id = ?", "g-dup").Error)
+	require.Len(t, groups, 1)
+	assert.Equal(t, "team-renamed", groups[0].Name)
+	assert.Equal(t, "team-renamed", groups[0].FriendlyName)
+	assert.ElementsMatch(t, []string{"alice"}, usernames(groups[0].Users))
+}
+
+func TestLdapServiceSyncAllSetsAdminFromGroupMembership(t *testing.T) {
+	tests := []struct {
+		name        string
+		appConfig   *model.AppConfig
+		groupEntry  *ldap.Entry
+		groupName   string
+		groupLookup string
+	}{
+		{
+			name:      "memberOf missing on user",
+			appConfig: defaultTestLDAPAppConfig(),
+			groupEntry: ldapEntry("cn=admins,ou=groups,dc=example,dc=com", map[string][]string{
+				"entryUUID": {"g-admins"},
+				"cn":        {"admins"},
+				"member":    {"uid=testadmin,ou=people,dc=example,dc=com"},
+			}),
+			groupName:   "admins",
+			groupLookup: "g-admins",
+		},
+		{
+			name: "configured group name attribute differs from DN RDN",
+			appConfig: func() *model.AppConfig {
+				cfg := defaultTestLDAPAppConfig()
+				cfg.LdapAttributeGroupName = model.AppConfigVariable{Value: "displayName"}
+				cfg.LdapAdminGroupName = model.AppConfigVariable{Value: "pocketid.admin"}
+				return cfg
+			}(),
+			groupEntry: ldapEntry("cn=admins,ou=groups,dc=example,dc=com", map[string][]string{
+				"entryUUID":   {"g-display-admins"},
+				"cn":          {"admins"},
+				"displayName": {"pocketid.admin"},
+				"member":      {"uid=testadmin,ou=people,dc=example,dc=com"},
+			}),
+			groupName:   "pocketid.admin",
+			groupLookup: "g-display-admins",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			service, db := newTestLdapServiceWithAppConfig(t, tt.appConfig, newFakeLDAPClient(
+				ldapSearchResult(
+					ldapEntry("uid=testadmin,ou=people,dc=example,dc=com", map[string][]string{
+						"entryUUID":   {"u-testadmin"},
+						"uid":         {"testadmin"},
+						"mail":        {"testadmin@example.com"},
+						"givenName":   {"Test"},
+						"sn":          {"Admin"},
+						"displayName": {""},
+					}),
+				),
+				ldapSearchResult(tt.groupEntry),
+			))
+
+			require.NoError(t, service.SyncAll(t.Context()))
+
+			var user model.User
+			require.NoError(t, db.First(&user, "ldap_id = ?", "u-testadmin").Error)
+			assert.True(t, user.IsAdmin)
+
+			var group model.UserGroup
+			require.NoError(t, db.Preload("Users").First(&group, "ldap_id = ?", tt.groupLookup).Error)
+			assert.Equal(t, tt.groupName, group.Name)
+			assert.ElementsMatch(t, []string{"testadmin"}, usernames(group.Users))
+		})
+	}
+}
+
+func newTestLdapService(t *testing.T, client ldapClient) (*LdapService, *gorm.DB) {
+	t.Helper()
+
+	return newTestLdapServiceWithAppConfig(t, defaultTestLDAPAppConfig(), client)
+}
+
+func newTestLdapServiceWithAppConfig(t *testing.T, appConfigModel *model.AppConfig, client ldapClient) (*LdapService, *gorm.DB) {
+	t.Helper()
+
+	db := testutils.NewDatabaseForTest(t)
+
+	fileStorage, err := storage.NewDatabaseStorage(db)
+	require.NoError(t, err)
+
+	appConfig := NewTestAppConfigService(appConfigModel)
+
+	groupService := NewUserGroupService(db, appConfig, nil)
+	userService := NewUserService(
+		db,
+		nil,
+		nil,
+		nil,
+		appConfig,
+		NewCustomClaimService(db),
+		NewAppImagesService(map[string]string{}, fileStorage),
+		nil,
+		fileStorage,
+	)
+
+	service := NewLdapService(db, &http.Client{}, appConfig, userService, groupService, fileStorage)
+	service.clientFactory = func() (ldapClient, error) {
+		return client, nil
+	}
+
+	return service, db
+}
+
+func defaultTestLDAPAppConfig() *model.AppConfig {
+	return &model.AppConfig{
+		RequireUserEmail:                   model.AppConfigVariable{Value: "false"},
+		LdapEnabled:                        model.AppConfigVariable{Value: "true"},
+		LdapBase:                           model.AppConfigVariable{Value: "dc=example,dc=com"},
+		LdapUserSearchFilter:               model.AppConfigVariable{Value: "(objectClass=person)"},
+		LdapUserGroupSearchFilter:          model.AppConfigVariable{Value: "(objectClass=groupOfNames)"},
+		LdapAttributeUserUniqueIdentifier:  model.AppConfigVariable{Value: "entryUUID"},
+		LdapAttributeUserUsername:          model.AppConfigVariable{Value: "uid"},
+		LdapAttributeUserEmail:             model.AppConfigVariable{Value: "mail"},
+		LdapAttributeUserFirstName:         model.AppConfigVariable{Value: "givenName"},
+		LdapAttributeUserLastName:          model.AppConfigVariable{Value: "sn"},
+		LdapAttributeUserDisplayName:       model.AppConfigVariable{Value: "displayName"},
+		LdapAttributeUserProfilePicture:    model.AppConfigVariable{Value: "jpegPhoto"},
+		LdapAttributeGroupMember:           model.AppConfigVariable{Value: "member"},
+		LdapAttributeGroupUniqueIdentifier: model.AppConfigVariable{Value: "entryUUID"},
+		LdapAttributeGroupName:             model.AppConfigVariable{Value: "cn"},
+		LdapAdminGroupName:                 model.AppConfigVariable{Value: "admins"},
+		LdapSoftDeleteUsers:                model.AppConfigVariable{Value: "true"},
+	}
+}
+
+func newFakeLDAPClient(userResult, groupResult *ldap.SearchResult) ldapClient {
+	return &fakeLDAPClient{
+		searchFn: func(searchRequest *ldap.SearchRequest) (*ldap.SearchResult, error) {
+			switch searchRequest.Filter {
+			case "(objectClass=person)":
+				return userResult, nil
+			case "(objectClass=groupOfNames)":
+				return groupResult, nil
+			default:
+				return &ldap.SearchResult{}, nil
+			}
+		},
+	}
+}
+
+func ldapSearchResult(entries ...*ldap.Entry) *ldap.SearchResult {
+	return &ldap.SearchResult{Entries: entries}
+}
+
+func ldapEntry(dn string, attrs map[string][]string) *ldap.Entry {
+	entry := &ldap.Entry{
+		DN:         dn,
+		Attributes: make([]*ldap.EntryAttribute, 0, len(attrs)),
+	}
+
+	for name, values := range attrs {
+		entry.Attributes = append(entry.Attributes, &ldap.EntryAttribute{
+			Name:   name,
+			Values: values,
+		})
+	}
+
+	return entry
+}
+
+func usernames(users []model.User) []string {
+	result := make([]string, 0, len(users))
+	for _, user := range users {
+		result = append(result, user.Username)
+	}
+
+	return result
+}
+
 func TestGetDNProperty(t *testing.T) {
 	tests := []struct {
 		name           string
@@ -64,10 +423,58 @@ func TestGetDNProperty(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			result := getDNProperty(tt.property, tt.dn)
-			if result != tt.expectedResult {
-				t.Errorf("getDNProperty(%q, %q) = %q, want %q",
-					tt.property, tt.dn, result, tt.expectedResult)
-			}
+			assert.Equalf(t, tt.expectedResult, result, "getDNProperty(%q, %q)", tt.property, tt.dn)
+		})
+	}
+}
+
+func TestNormalizeLDAPDN(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "already normalized",
+			input:    "cn=alice,dc=example,dc=com",
+			expected: "cn=alice,dc=example,dc=com",
+		},
+		{
+			name:     "uppercase attribute types",
+			input:    "CN=Alice,DC=example,DC=com",
+			expected: "cn=alice,dc=example,dc=com",
+		},
+		{
+			name:     "spaces after commas",
+			input:    "cn=alice, dc=example, dc=com",
+			expected: "cn=alice,dc=example,dc=com",
+		},
+		{
+			name:     "uppercase types and spaces",
+			input:    "CN=Alice, DC=example, DC=com",
+			expected: "cn=alice,dc=example,dc=com",
+		},
+		{
+			name:     "multi-valued RDN",
+			input:    "cn=alice+uid=a123,dc=example,dc=com",
+			expected: "cn=alice+uid=a123,dc=example,dc=com",
+		},
+		{
+			name:     "invalid DN falls back to lowercase+trim",
+			input:    "  NOT A VALID DN  ",
+			expected: "not a valid dn",
+		},
+		{
+			name:     "empty string",
+			input:    "",
+			expected: "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := normalizeLDAPDN(tt.input)
+			assert.Equalf(t, tt.expected, result, "normalizeLDAPDN(%q)", tt.input)
 		})
 	}
 }
@@ -98,9 +505,7 @@ func TestConvertLdapIdToString(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			got := convertLdapIdToString(tt.input)
-			if got != tt.expected {
-				t.Errorf("Expected %q, got %q", tt.expected, got)
-			}
+			assert.Equal(t, tt.expected, got)
 		})
 	}
 }
--- a/backend/internal/service/oidc_service.go
+++ b/backend/internal/service/oidc_service.go
@@ -56,6 +56,7 @@ type OidcService struct {
 	auditLogService    *AuditLogService
 	customClaimService *CustomClaimService
 	webAuthnService    *WebAuthnService
+	scimService        *ScimService

 	httpClient  *http.Client
 	jwkCache    *jwk.Cache
@@ -70,6 +71,7 @@ func NewOidcService(
 	auditLogService *AuditLogService,
 	customClaimService *CustomClaimService,
 	webAuthnService *WebAuthnService,
+	scimService *ScimService,
 	httpClient *http.Client,
 	fileStorage storage.FileStorage,
 ) (s *OidcService, err error) {
@@ -80,6 +82,7 @@ func NewOidcService(
 		auditLogService:    auditLogService,
 		customClaimService: customClaimService,
 		webAuthnService:    webAuthnService,
+		scimService:        scimService,
 		httpClient:         httpClient,
 		fileStorage:        fileStorage,
 	}
@@ -122,9 +125,7 @@ func (s *OidcService) getJWKCache(ctx context.Context) (*jwk.Cache, error) {

 func (s *OidcService) Authorize(ctx context.Context, input dto.AuthorizeOidcClientRequestDto, userID, ipAddress, userAgent string) (string, string, error) {
 	tx := s.db.Begin()
-	defer func() {
-		tx.Rollback()
-	}()
+	defer tx.Rollback()

 	var client model.OidcClient
 	err := tx.
@@ -311,7 +312,7 @@ func (s *OidcService) createTokenFromDeviceCode(ctx context.Context, input dto.O
 	}

 	// Explicitly use the input clientID for the audience claim to ensure consistency
-	idToken, err := s.jwtService.GenerateIDToken(userClaims, input.ClientID, "")
+	idToken, err := s.jwtService.GenerateIDToken(userClaims, input.ClientID, deviceAuth.Nonce)
 	if err != nil {
 		return CreatedTokens{}, err
 	}
@@ -401,7 +402,7 @@ func (s *OidcService) createTokenFromAuthorizationCode(ctx context.Context, inpu
 		}
 	}

-	if authorizationCodeMetaData.ClientID != input.ClientID && authorizationCodeMetaData.ExpiresAt.ToTime().Before(time.Now()) {
+	if authorizationCodeMetaData.ClientID != input.ClientID || authorizationCodeMetaData.ExpiresAt.ToTime().Before(time.Now()) {
 		return CreatedTokens{}, &common.OidcInvalidAuthorizationCodeError{}
 	}

@@ -728,7 +729,7 @@ func (s *OidcService) CreateClient(ctx context.Context, input dto.OidcClientCrea
 		Base: model.Base{
 			ID: input.ID,
 		},
-		CreatedByID: utils.Ptr(userID),
+		CreatedByID: new(userID),
 	}
 	updateOIDCClientModelFromDto(&client, &input.OidcClientUpdateDto)

@@ -1088,6 +1089,7 @@ func (s *OidcService) UpdateAllowedUserGroups(ctx context.Context, id string, in
 		return model.OidcClient{}, err
 	}

+	s.scimService.ScheduleSync()
 	return client, nil
 }

@@ -1278,6 +1280,7 @@ func (s *OidcService) CreateDeviceAuthorization(ctx context.Context, input dto.O
 		ExpiresAt:    datatype.DateTime(time.Now().Add(DeviceCodeDuration)),
 		IsAuthorized: false,
 		ClientID:     client.ID,
+		Nonce:        input.Nonce,
 	}

 	if err := s.db.Create(deviceAuth).Error; err != nil {
@@ -1639,34 +1642,19 @@ func clientAuthCredentialsFromCreateTokensDto(d *dto.OidcCreateTokensDto) Client
 }

 func (s *OidcService) verifyClientCredentialsInternal(ctx context.Context, tx *gorm.DB, input ClientAuthCredentials, allowPublicClientsWithoutAuth bool) (client *model.OidcClient, err error) {
-	isClientAssertion := input.ClientAssertionType == ClientAssertionTypeJWTBearer && input.ClientAssertion != ""
-
-	// Determine the client ID based on the authentication method
-	var clientID string
-	switch {
-	case isClientAssertion:
-		// Extract client ID from the JWT assertion's 'sub' claim
-		clientID, err = s.extractClientIDFromAssertion(input.ClientAssertion)
-		if err != nil {
-			slog.Error("Failed to extract client ID from assertion", "error", err)
-			return nil, &common.OidcClientAssertionInvalidError{}
-		}
-	case input.ClientID != "":
-		// Use the provided client ID for other authentication methods
-		clientID = input.ClientID
-	default:
+	if input.ClientID == "" {
 		return nil, &common.OidcMissingClientCredentialsError{}
 	}

 	// Load the OIDC client's configuration
 	err = tx.
 		WithContext(ctx).
-		First(&client, "id = ?", clientID).
+		First(&client, "id = ?", input.ClientID).
 		Error
-	if err != nil {
-		if errors.Is(err, gorm.ErrRecordNotFound) && isClientAssertion {
-			return nil, &common.OidcClientAssertionInvalidError{}
-		}
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		slog.WarnContext(ctx, "Client not found", slog.String("client", input.ClientID))
+		return nil, &common.OidcClientNotFoundError{}
+	} else if err != nil {
 		return nil, err
 	}

@@ -1681,7 +1669,7 @@ func (s *OidcService) verifyClientCredentialsInternal(ctx context.Context, tx *g
 		return client, nil

 	// Next, check if we want to use client assertions from federated identities
-	case isClientAssertion:
+	case input.ClientAssertionType == ClientAssertionTypeJWTBearer && input.ClientAssertion != "":
 		err = s.verifyClientAssertionFromFederatedIdentities(ctx, client, input)
 		if err != nil {
 			slog.WarnContext(ctx, "Invalid assertion for client", slog.String("client", client.ID), slog.Any("error", err))
@@ -1778,36 +1766,20 @@ func (s *OidcService) verifyClientAssertionFromFederatedIdentities(ctx context.C
 	// (Note: we don't use jwt.WithIssuer() because that would be redundant)
 	_, err = jwt.Parse(assertion,
 		jwt.WithValidate(true),
+
 		jwt.WithAcceptableSkew(clockSkew),
 		jwt.WithKeySet(jwks, jws.WithInferAlgorithmFromKey(true), jws.WithUseDefault(true)),
 		jwt.WithAudience(audience),
 		jwt.WithSubject(subject),
 	)
 	if err != nil {
-		return fmt.Errorf("client assertion is not valid: %w", err)
+		return fmt.Errorf("client assertion could not be verified: %w", err)
 	}

 	// If we're here, the assertion is valid
 	return nil
 }

-// extractClientIDFromAssertion extracts the client_id from the JWT assertion's 'sub' claim
-func (s *OidcService) extractClientIDFromAssertion(assertion string) (string, error) {
-	// Parse the JWT without verification first to get the claims
-	insecureToken, err := jwt.ParseInsecure([]byte(assertion))
-	if err != nil {
-		return "", fmt.Errorf("failed to parse JWT assertion: %w", err)
-	}
-
-	// Extract the subject claim which must be the client_id according to RFC 7523
-	sub, ok := insecureToken.Subject()
-	if !ok || sub == "" {
-		return "", fmt.Errorf("missing or invalid 'sub' claim in JWT assertion")
-	}
-
-	return sub, nil
-}
-
 func (s *OidcService) GetClientPreview(ctx context.Context, clientID string, userID string, scopes []string) (*dto.OidcClientPreviewDto, error) {
 	tx := s.db.Begin()
 	defer func() {
@@ -1895,7 +1867,7 @@ func (s *OidcService) getUserClaims(ctx context.Context, user *model.User, scope
 	claims["sub"] = user.ID
 	if slices.Contains(scopes, "email") {
 		claims["email"] = user.Email
-		claims["email_verified"] = s.appConfigService.GetDbConfig().EmailsVerified.IsTrue()
+		claims["email_verified"] = user.EmailVerified
 	}

 	if slices.Contains(scopes, "groups") {
--- a/backend/internal/service/oidc_service_test.go
+++ b/backend/internal/service/oidc_service_test.go
@@ -160,7 +160,7 @@ func TestOidcService_verifyClientCredentialsInternal(t *testing.T) {
 	mockConfig := NewTestAppConfigService(&model.AppConfig{
 		SessionDuration: model.AppConfigVariable{Value: "60"}, // 60 minutes
 	})
-	mockJwtService, err := NewJwtService(db, mockConfig)
+	mockJwtService, err := NewJwtService(t.Context(), db, mockConfig)
 	require.NoError(t, err)

 	// Create a mock HTTP client with custom transport to return the JWKS
@@ -229,6 +229,12 @@ func TestOidcService_verifyClientCredentialsInternal(t *testing.T) {
 					Subject:  federatedClient.ID,
 					JWKS:     federatedClientIssuer + "/jwks.json",
 				},
+				{
+					Issuer:   "federated-issuer-2",
+					Audience: federatedClientAudience,
+					Subject:  "my-federated-client",
+					JWKS:     federatedClientIssuer + "/jwks.json",
+				},
 				{Issuer: federatedClientIssuerDefaults},
 			},
 		},
@@ -461,6 +467,43 @@ func TestOidcService_verifyClientCredentialsInternal(t *testing.T) {

 				// Generate a token
 				input := dto.OidcCreateTokensDto{
+					ClientID:            federatedClient.ID,
+					ClientAssertion:     string(signedToken),
+					ClientAssertionType: ClientAssertionTypeJWTBearer,
+				}
+				createdToken, err := s.createTokenFromClientCredentials(t.Context(), input)
+				require.NoError(t, err)
+				require.NotNil(t, token)
+
+				// Verify the token
+				claims, err := s.jwtService.VerifyOAuthAccessToken(createdToken.AccessToken)
+				require.NoError(t, err, "Failed to verify generated token")
+
+				// Check the claims
+				subject, ok := claims.Subject()
+				_ = assert.True(t, ok, "User ID not found in token") &&
+					assert.Equal(t, "client-"+federatedClient.ID, subject, "Token subject should match federated client ID with prefix")
+				audience, ok := claims.Audience()
+				_ = assert.True(t, ok, "Audience not found in token") &&
+					assert.Equal(t, []string{federatedClient.ID}, audience, "Audience should contain the federated client ID")
+			})
+
+			t.Run("Succeeds with valid assertion and custom subject", func(t *testing.T) {
+				// Create JWT for federated identity
+				token, err := jwt.NewBuilder().
+					Issuer("federated-issuer-2").
+					Audience([]string{federatedClientAudience}).
+					Subject("my-federated-client").
+					IssuedAt(time.Now()).
+					Expiration(time.Now().Add(10 * time.Minute)).
+					Build()
+				require.NoError(t, err)
+				signedToken, err := jwt.Sign(token, jwt.WithKey(jwa.ES256(), privateJWK))
+				require.NoError(t, err)
+
+				// Generate a token
+				input := dto.OidcCreateTokensDto{
+					ClientID:            federatedClient.ID,
 					ClientAssertion:     string(signedToken),
 					ClientAssertionType: ClientAssertionTypeJWTBearer,
 				}
@@ -483,6 +526,7 @@ func TestOidcService_verifyClientCredentialsInternal(t *testing.T) {

 			t.Run("Fails with invalid assertion", func(t *testing.T) {
 				input := dto.OidcCreateTokensDto{
+					ClientID:            confidentialClient.ID,
 					ClientAssertion:     "invalid.jwt.token",
 					ClientAssertionType: ClientAssertionTypeJWTBearer,
 				}
--- a/backend/internal/service/one_time_access_service.go
+++ b/backend/internal/service/one_time_access_service.go
@@ -0,0 +1,253 @@
+package service
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/pocket-id/pocket-id/backend/internal/common"
+	"github.com/pocket-id/pocket-id/backend/internal/model"
+	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
+	"github.com/pocket-id/pocket-id/backend/internal/utils"
+	"github.com/pocket-id/pocket-id/backend/internal/utils/email"
+	"go.opentelemetry.io/otel/trace"
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+type OneTimeAccessService struct {
+	db               *gorm.DB
+	userService      *UserService
+	appConfigService *AppConfigService
+	jwtService       *JwtService
+	auditLogService  *AuditLogService
+	emailService     *EmailService
+}
+
+func NewOneTimeAccessService(db *gorm.DB, userService *UserService, jwtService *JwtService, auditLogService *AuditLogService, emailService *EmailService, appConfigService *AppConfigService) *OneTimeAccessService {
+	return &OneTimeAccessService{
+		db:               db,
+		userService:      userService,
+		appConfigService: appConfigService,
+		jwtService:       jwtService,
+		auditLogService:  auditLogService,
+		emailService:     emailService,
+	}
+}
+
+func (s *OneTimeAccessService) RequestOneTimeAccessEmailAsAdmin(ctx context.Context, userID string, ttl time.Duration) error {
+	isDisabled := !s.appConfigService.GetDbConfig().EmailOneTimeAccessAsAdminEnabled.IsTrue()
+	if isDisabled {
+		return &common.OneTimeAccessDisabledError{}
+	}
+
+	_, err := s.requestOneTimeAccessEmailInternal(ctx, userID, "", ttl, false)
+	return err
+}
+
+func (s *OneTimeAccessService) RequestOneTimeAccessEmailAsUnauthenticatedUser(ctx context.Context, userID, redirectPath string) (string, error) {
+	isDisabled := !s.appConfigService.GetDbConfig().EmailOneTimeAccessAsUnauthenticatedEnabled.IsTrue()
+	if isDisabled {
+		return "", &common.OneTimeAccessDisabledError{}
+	}
+
+	var userId string
+	err := s.db.Model(&model.User{}).Select("id").Where("email = ?", userID).First(&userId).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		// Do not return error if user not found to prevent email enumeration
+		return "", nil
+	} else if err != nil {
+		return "", err
+	}
+
+	deviceToken, err := s.requestOneTimeAccessEmailInternal(ctx, userId, redirectPath, 15*time.Minute, true)
+	if err != nil {
+		return "", err
+	} else if deviceToken == nil {
+		return "", errors.New("device token expected but not returned")
+	}
+
+	return *deviceToken, nil
+}
+
+func (s *OneTimeAccessService) requestOneTimeAccessEmailInternal(ctx context.Context, userID, redirectPath string, ttl time.Duration, withDeviceToken bool) (*string, error) {
+	tx := s.db.Begin()
+	defer func() {
+		tx.Rollback()
+	}()
+
+	user, err := s.userService.getUserInternal(ctx, userID, tx)
+	if err != nil {
+		return nil, err
+	}
+
+	if user.Email == nil {
+		return nil, &common.UserEmailNotSetError{}
+	}
+
+	oneTimeAccessToken, deviceToken, err := s.createOneTimeAccessTokenInternal(ctx, user.ID, ttl, withDeviceToken, tx)
+	if err != nil {
+		return nil, err
+	}
+	err = tx.Commit().Error
+	if err != nil {
+		return nil, err
+	}
+
+	// We use a background context here as this is running in a goroutine
+	//nolint:contextcheck
+	go func() {
+		span := trace.SpanFromContext(ctx)
+		innerCtx := trace.ContextWithSpan(context.Background(), span)
+
+		link := common.EnvConfig.AppURL + "/lc"
+		linkWithCode := link + "/" + oneTimeAccessToken
+
+		// Add redirect path to the link
+		if strings.HasPrefix(redirectPath, "/") {
+			encodedRedirectPath := url.QueryEscape(redirectPath)
+			linkWithCode = linkWithCode + "?redirect=" + encodedRedirectPath
+		}
+
+		errInternal := SendEmail(innerCtx, s.emailService, email.Address{
+			Name:  user.FullName(),
+			Email: *user.Email,
+		}, OneTimeAccessTemplate, &OneTimeAccessTemplateData{
+			Code:              oneTimeAccessToken,
+			LoginLink:         link,
+			LoginLinkWithCode: linkWithCode,
+			ExpirationString:  utils.DurationToString(ttl),
+		})
+		if errInternal != nil {
+			slog.ErrorContext(innerCtx, "Failed to send one-time access token email", slog.Any("error", errInternal), slog.String("address", *user.Email))
+			return
+		}
+	}()
+
+	return deviceToken, nil
+}
+
+func (s *OneTimeAccessService) CreateOneTimeAccessToken(ctx context.Context, userID string, ttl time.Duration) (token string, err error) {
+	tx := s.db.Begin()
+	defer func() {
+		tx.Rollback()
+	}()
+
+	// Load the user to ensure it exists
+	_, err = s.userService.getUserInternal(ctx, userID, tx)
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return "", &common.UserNotFoundError{}
+	} else if err != nil {
+		return "", err
+	}
+
+	// Create the one-time access token
+	token, _, err = s.createOneTimeAccessTokenInternal(ctx, userID, ttl, false, tx)
+	if err != nil {
+		return "", err
+	}
+
+	// Commit
+	err = tx.Commit().Error
+	if err != nil {
+		return "", err
+	}
+
+	return token, nil
+}
+
+func (s *OneTimeAccessService) createOneTimeAccessTokenInternal(ctx context.Context, userID string, ttl time.Duration, withDeviceToken bool, tx *gorm.DB) (token string, deviceToken *string, err error) {
+	oneTimeAccessToken, err := NewOneTimeAccessToken(userID, ttl, withDeviceToken)
+	if err != nil {
+		return "", nil, err
+	}
+
+	err = tx.WithContext(ctx).Create(oneTimeAccessToken).Error
+	if err != nil {
+		return "", nil, err
+	}
+
+	return oneTimeAccessToken.Token, oneTimeAccessToken.DeviceToken, nil
+}
+
+func (s *OneTimeAccessService) ExchangeOneTimeAccessToken(ctx context.Context, token, deviceToken, ipAddress, userAgent string) (model.User, string, error) {
+	tx := s.db.Begin()
+	defer func() {
+		tx.Rollback()
+	}()
+
+	var oneTimeAccessToken model.OneTimeAccessToken
+	err := tx.
+		WithContext(ctx).
+		Where("token = ? AND expires_at > ?", token, datatype.DateTime(time.Now())).
+		Preload("User").
+		Clauses(clause.Locking{Strength: "UPDATE"}).
+		First(&oneTimeAccessToken).
+		Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return model.User{}, "", &common.TokenInvalidOrExpiredError{}
+		}
+		return model.User{}, "", err
+	}
+	if oneTimeAccessToken.DeviceToken != nil && deviceToken != *oneTimeAccessToken.DeviceToken {
+		return model.User{}, "", &common.DeviceCodeInvalid{}
+	}
+
+	accessToken, err := s.jwtService.GenerateAccessToken(oneTimeAccessToken.User)
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	err = tx.
+		WithContext(ctx).
+		Delete(&oneTimeAccessToken).
+		Error
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	s.auditLogService.Create(ctx, model.AuditLogEventOneTimeAccessTokenSignIn, ipAddress, userAgent, oneTimeAccessToken.User.ID, model.AuditLogData{}, tx)
+
+	err = tx.Commit().Error
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	return oneTimeAccessToken.User, accessToken, nil
+}
+
+func NewOneTimeAccessToken(userID string, ttl time.Duration, withDeviceToken bool) (*model.OneTimeAccessToken, error) {
+	// If expires at is less than 15 minutes, use a 6-character token instead of 16
+	tokenLength := 16
+	if ttl <= 15*time.Minute {
+		tokenLength = 6
+	}
+
+	token, err := utils.GenerateRandomUnambiguousString(tokenLength)
+	if err != nil {
+		return nil, err
+	}
+
+	var deviceToken *string
+	if withDeviceToken {
+		dt, err := utils.GenerateRandomAlphanumericString(16)
+		if err != nil {
+			return nil, err
+		}
+		deviceToken = &dt
+	}
+
+	now := time.Now().Round(time.Second)
+	o := &model.OneTimeAccessToken{
+		UserID:      userID,
+		ExpiresAt:   datatype.DateTime(now.Add(ttl)),
+		Token:       token,
+		DeviceToken: deviceToken,
+	}
+
+	return o, nil
+}
--- a/backend/internal/service/scheduler.go
+++ b/backend/internal/service/scheduler.go
@@ -0,0 +1,25 @@
+package service
+
+import (
+	"context"
+
+	backoff "github.com/cenkalti/backoff/v5"
+	"github.com/go-co-op/gocron/v2"
+)
+
+// RegisterJobOpts holds optional configuration for registering a scheduled job.
+type RegisterJobOpts struct {
+	// RunImmediately runs the job immediately after registration.
+	RunImmediately bool
+	// ExtraOptions are additional gocron job options.
+	ExtraOptions []gocron.JobOption
+	// BackOff is an optional backoff strategy. If non-nil, the job will be wrapped
+	// with automatic retry logic using the provided backoff on transient failures.
+	BackOff backoff.BackOff
+}
+
+// Scheduler is an interface for registering and managing background jobs.
+type Scheduler interface {
+	RegisterJob(ctx context.Context, name string, def gocron.JobDefinition, job func(ctx context.Context) error, opts RegisterJobOpts) error
+	RemoveJob(name string) error
+}
--- a/backend/internal/service/scim_scheduler_service.go
+++ b/backend/internal/service/scim_scheduler_service.go
@@ -1,136 +0,0 @@
-package service
-
-import (
-	"context"
-	"errors"
-	"log/slog"
-	"sync"
-	"time"
-
-	"gorm.io/gorm"
-)
-
-// ScimSchedulerService schedules and triggers periodic synchronization
-// of SCIM service providers. Each provider is tracked independently,
-// and sync operations are run at or after their scheduled time.
-type ScimSchedulerService struct {
-	scimService      *ScimService
-	providerSyncTime map[string]time.Time
-	mu               sync.RWMutex
-}
-
-func NewScimSchedulerService(ctx context.Context, scimService *ScimService) (*ScimSchedulerService, error) {
-	s := &ScimSchedulerService{
-		scimService:      scimService,
-		providerSyncTime: make(map[string]time.Time),
-	}
-
-	err := s.start(ctx)
-	return s, err
-}
-
-// ScheduleSync forces the given provider to be synced soon by
-// moving its next scheduled time to 5 minutes from now.
-func (s *ScimSchedulerService) ScheduleSync(providerID string) {
-	s.setSyncTime(providerID, 5*time.Minute)
-}
-
-// start initializes the scheduler and begins the synchronization loop.
-// Syncs happen every hour by default, but ScheduleSync can be called to schedule a sync sooner.
-func (s *ScimSchedulerService) start(ctx context.Context) error {
-	if err := s.refreshProviders(ctx); err != nil {
-		return err
-	}
-
-	go func() {
-		const (
-			syncCheckInterval    = 5 * time.Second
-			providerRefreshDelay = time.Minute
-		)
-
-		ticker := time.NewTicker(syncCheckInterval)
-		defer ticker.Stop()
-		lastProviderRefresh := time.Now()
-
-		for {
-			select {
-			case <-ctx.Done():
-				return
-				// Runs every 5 seconds to check if any provider is due for sync
-			case <-ticker.C:
-				now := time.Now()
-				if now.Sub(lastProviderRefresh) >= providerRefreshDelay {
-					err := s.refreshProviders(ctx)
-					if err != nil {
-						slog.Error("Error refreshing SCIM service providers",
-							slog.Any("error", err),
-						)
-					} else {
-						lastProviderRefresh = now
-					}
-				}
-
-				var due []string
-				s.mu.RLock()
-				for providerID, syncTime := range s.providerSyncTime {
-					if !syncTime.After(now) {
-						due = append(due, providerID)
-					}
-				}
-				s.mu.RUnlock()
-
-				s.syncProviders(ctx, due)
-
-			}
-		}
-	}()
-
-	return nil
-}
-
-func (s *ScimSchedulerService) refreshProviders(ctx context.Context) error {
-	providers, err := s.scimService.ListServiceProviders(ctx)
-	if err != nil {
-		return err
-	}
-
-	inAHour := time.Now().Add(time.Hour)
-
-	s.mu.Lock()
-	for _, provider := range providers {
-		if _, exists := s.providerSyncTime[provider.ID]; !exists {
-			s.providerSyncTime[provider.ID] = inAHour
-		}
-	}
-	s.mu.Unlock()
-
-	return nil
-}
-
-func (s *ScimSchedulerService) syncProviders(ctx context.Context, providerIDs []string) {
-	for _, providerID := range providerIDs {
-		err := s.scimService.SyncServiceProvider(ctx, providerID)
-		if err != nil {
-			if errors.Is(err, gorm.ErrRecordNotFound) {
-				// Remove the provider from the schedule if it no longer exists
-				s.mu.Lock()
-				delete(s.providerSyncTime, providerID)
-				s.mu.Unlock()
-			} else {
-				slog.Error("Error syncing SCIM client",
-					slog.String("provider_id", providerID),
-					slog.Any("error", err),
-				)
-			}
-			continue
-		}
-		// A successful sync schedules the next sync in an hour
-		s.setSyncTime(providerID, time.Hour)
-	}
-}
-
-func (s *ScimSchedulerService) setSyncTime(providerID string, t time.Duration) {
-	s.mu.Lock()
-	s.providerSyncTime[providerID] = time.Now().Add(t)
-	s.mu.Unlock()
-}
--- a/backend/internal/service/scim_service.go
+++ b/backend/internal/service/scim_service.go
@@ -11,10 +11,12 @@ import (
 	"net/http"
 	"net/url"
 	"path"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

+	"github.com/go-co-op/gocron/v2"
 	"github.com/pocket-id/pocket-id/backend/internal/dto"
 	"github.com/pocket-id/pocket-id/backend/internal/model"
 	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
@@ -48,15 +50,16 @@ type scimSyncStats struct {
 // ScimService handles SCIM provisioning to external service providers.
 type ScimService struct {
 	db         *gorm.DB
+	scheduler  Scheduler
 	httpClient *http.Client
 }

-func NewScimService(db *gorm.DB, httpClient *http.Client) *ScimService {
+func NewScimService(db *gorm.DB, scheduler Scheduler, httpClient *http.Client) *ScimService {
 	if httpClient == nil {
 		httpClient = &http.Client{Timeout: 20 * time.Second}
 	}

-	return &ScimService{db: db, httpClient: httpClient}
+	return &ScimService{db: db, scheduler: scheduler, httpClient: httpClient}
 }

 func (s *ScimService) GetServiceProvider(
@@ -132,6 +135,42 @@ func (s *ScimService) DeleteServiceProvider(ctx context.Context, serviceProvider
 		Error
 }

+//nolint:contextcheck
+func (s *ScimService) ScheduleSync() {
+	jobName := "ScheduledScimSync"
+	start := time.Now().Add(5 * time.Minute)
+
+	_ = s.scheduler.RemoveJob(jobName)
+
+	err := s.scheduler.RegisterJob(
+		context.Background(), jobName,
+		gocron.OneTimeJob(gocron.OneTimeJobStartDateTime(start)), s.SyncAll, RegisterJobOpts{})
+
+	if err != nil {
+		slog.Error("Failed to schedule SCIM sync", slog.Any("error", err))
+	}
+}
+
+func (s *ScimService) SyncAll(ctx context.Context) error {
+	providers, err := s.ListServiceProviders(ctx)
+	if err != nil {
+		return err
+	}
+
+	var errs []error
+	for _, provider := range providers {
+		if ctx.Err() != nil {
+			errs = append(errs, ctx.Err())
+			break
+		}
+		err = s.SyncServiceProvider(ctx, provider.ID)
+		if err != nil {
+			errs = append(errs, fmt.Errorf("failed to sync SCIM provider %s: %w", provider.ID, err))
+		}
+	}
+	return errors.Join(errs...)
+}
+
 func (s *ScimService) SyncServiceProvider(ctx context.Context, serviceProviderID string) error {
 	start := time.Now()
 	provider, err := s.GetServiceProvider(ctx, serviceProviderID)
@@ -167,26 +206,20 @@ func (s *ScimService) SyncServiceProvider(ctx context.Context, serviceProviderID
 	}

 	var errs []error
-	var userStats scimSyncStats
-	var groupStats scimSyncStats

 	// Sync users first, so that groups can reference them
-	if stats, err := s.syncUsers(ctx, provider, users, &userResources); err != nil {
-		errs = append(errs, err)
-		userStats = stats
-	} else {
-		userStats = stats
-	}
-
-	stats, err := s.syncGroups(ctx, provider, groups, groupResources.Resources, userResources.Resources)
+	userStats, err := s.syncUsers(ctx, provider, users, &userResources)
+	if err != nil {
+		errs = append(errs, err)
+	}
+
+	groupStats, err := s.syncGroups(ctx, provider, groups, groupResources.Resources, userResources.Resources)
 	if err != nil {
 		errs = append(errs, err)
-		groupStats = stats
-	} else {
-		groupStats = stats
 	}

 	if len(errs) > 0 {
+		err = errors.Join(errs...)
 		slog.WarnContext(ctx, "SCIM sync completed with errors",
 			slog.String("provider_id", provider.ID),
 			slog.Int("error_count", len(errs)),
@@ -197,12 +230,14 @@ func (s *ScimService) SyncServiceProvider(ctx context.Context, serviceProviderID
 			slog.Int("groups_updated", groupStats.Updated),
 			slog.Int("groups_deleted", groupStats.Deleted),
 			slog.Duration("duration", time.Since(start)),
+			slog.Any("error", err),
 		)
-		return errors.Join(errs...)
+		return err
 	}

-	provider.LastSyncedAt = utils.Ptr(datatype.DateTime(time.Now()))
-	if err := s.db.WithContext(ctx).Save(&provider).Error; err != nil {
+	provider.LastSyncedAt = new(datatype.DateTime(time.Now()))
+	err = s.db.WithContext(ctx).Save(&provider).Error
+	if err != nil {
 		return err
 	}

@@ -230,7 +265,7 @@ func (s *ScimService) syncUsers(

 	// Update or create users
 	for _, u := range users {
-		existing := getResourceByExternalID[dto.ScimUser](u.ID, resourceList.Resources)
+		existing := getResourceByExternalID(u.ID, resourceList.Resources)

 		action, created, err := s.syncUser(ctx, provider, u, existing)
 		if created != nil && existing == nil {
@@ -391,7 +426,7 @@ func (s *ScimService) syncGroup(
 	// Prepare group members
 	members := make([]dto.ScimGroupMember, len(group.Users))
 	for i, user := range group.Users {
-		userResource := getResourceByExternalID[dto.ScimUser](user.ID, userResources)
+		userResource := getResourceByExternalID(user.ID, userResources)
 		if userResource == nil {
 			// Groups depend on user IDs already being provisioned
 			return scimActionNone, fmt.Errorf("cannot sync group %s: user %s is not provisioned in SCIM provider", group.ID, user.ID)
@@ -746,10 +781,8 @@ func ensureScimStatus(
 	resp *http.Response,
 	provider model.ScimServiceProvider,
 	allowedStatuses ...int) error {
-	for _, status := range allowedStatuses {
-		if resp.StatusCode == status {
-			return nil
-		}
+	if slices.Contains(allowedStatuses, resp.StatusCode) {
+		return nil
 	}

 	body := readScimErrorBody(resp.Body)
--- a/backend/internal/service/user_group_service.go
+++ b/backend/internal/service/user_group_service.go
@@ -16,11 +16,12 @@ import (

 type UserGroupService struct {
 	db               *gorm.DB
+	scimService      *ScimService
 	appConfigService *AppConfigService
 }

-func NewUserGroupService(db *gorm.DB, appConfigService *AppConfigService) *UserGroupService {
-	return &UserGroupService{db: db, appConfigService: appConfigService}
+func NewUserGroupService(db *gorm.DB, appConfigService *AppConfigService, scimService *ScimService) *UserGroupService {
+	return &UserGroupService{db: db, appConfigService: appConfigService, scimService: scimService}
 }

 func (s *UserGroupService) List(ctx context.Context, name string, listRequestOptions utils.ListRequestOptions) (groups []model.UserGroup, response utils.PaginationResponse, err error) {
@@ -90,7 +91,16 @@ func (s *UserGroupService) Delete(ctx context.Context, id string) error {
 		return err
 	}

-	return tx.Commit().Error
+	err = tx.Commit().Error
+	if err != nil {
+		return err
+	}
+
+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
+	return nil
 }

 func (s *UserGroupService) Create(ctx context.Context, input dto.UserGroupCreateDto) (group model.UserGroup, err error) {
@@ -118,6 +128,11 @@ func (s *UserGroupService) createInternal(ctx context.Context, input dto.UserGro
 		}
 		return model.UserGroup{}, err
 	}
+
+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
 	return group, nil
 }

@@ -153,7 +168,7 @@ func (s *UserGroupService) updateInternal(ctx context.Context, id string, input

 	group.Name = input.Name
 	group.FriendlyName = input.FriendlyName
-	group.UpdatedAt = utils.Ptr(datatype.DateTime(time.Now()))
+	group.UpdatedAt = new(datatype.DateTime(time.Now()))

 	err = tx.
 		WithContext(ctx).
@@ -165,6 +180,11 @@ func (s *UserGroupService) updateInternal(ctx context.Context, id string, input
 	} else if err != nil {
 		return model.UserGroup{}, err
 	}
+
+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
 	return group, nil
 }

@@ -217,7 +237,7 @@ func (s *UserGroupService) updateUsersInternal(ctx context.Context, id string, u
 	}

 	// Save the updated group
-	group.UpdatedAt = utils.Ptr(datatype.DateTime(time.Now()))
+	group.UpdatedAt = new(datatype.DateTime(time.Now()))

 	err = tx.
 		WithContext(ctx).
@@ -227,6 +247,10 @@ func (s *UserGroupService) updateUsersInternal(ctx context.Context, id string, u
 		return model.UserGroup{}, err
 	}

+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
 	return group, nil
 }

@@ -303,5 +327,9 @@ func (s *UserGroupService) UpdateAllowedOidcClient(ctx context.Context, id strin
 		return model.UserGroup{}, err
 	}

+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
 	return group, nil
 }
--- a/backend/internal/service/user_service.go
+++ b/backend/internal/service/user_service.go
@@ -9,13 +9,11 @@ import (
 	"io"
 	"io/fs"
 	"log/slog"
-	"net/url"
 	"path"
-	"strings"
 	"time"

 	"github.com/google/uuid"
-	"go.opentelemetry.io/otel/trace"
+	"github.com/pocket-id/pocket-id/backend/internal/utils/email"
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"

@@ -25,7 +23,6 @@ import (
 	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
 	"github.com/pocket-id/pocket-id/backend/internal/storage"
 	"github.com/pocket-id/pocket-id/backend/internal/utils"
-	"github.com/pocket-id/pocket-id/backend/internal/utils/email"
 	profilepicture "github.com/pocket-id/pocket-id/backend/internal/utils/image"
 )

@@ -37,10 +34,11 @@ type UserService struct {
 	appConfigService   *AppConfigService
 	customClaimService *CustomClaimService
 	appImagesService   *AppImagesService
+	scimService        *ScimService
 	fileStorage        storage.FileStorage
 }

-func NewUserService(db *gorm.DB, jwtService *JwtService, auditLogService *AuditLogService, emailService *EmailService, appConfigService *AppConfigService, customClaimService *CustomClaimService, appImagesService *AppImagesService, fileStorage storage.FileStorage) *UserService {
+func NewUserService(db *gorm.DB, jwtService *JwtService, auditLogService *AuditLogService, emailService *EmailService, appConfigService *AppConfigService, customClaimService *CustomClaimService, appImagesService *AppImagesService, scimService *ScimService, fileStorage storage.FileStorage) *UserService {
 	return &UserService{
 		db:                 db,
 		jwtService:         jwtService,
@@ -49,6 +47,7 @@ func NewUserService(db *gorm.DB, jwtService *JwtService, auditLogService *AuditL
 		appConfigService:   appConfigService,
 		customClaimService: customClaimService,
 		appImagesService:   appImagesService,
+		scimService:        scimService,
 		fileStorage:        fileStorage,
 	}
 }
@@ -226,6 +225,10 @@ func (s *UserService) deleteUserInternal(ctx context.Context, tx *gorm.DB, userI
 		return fmt.Errorf("failed to delete user: %w", err)
 	}

+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
 	return nil
 }

@@ -266,15 +269,16 @@ func (s *UserService) createUserInternal(ctx context.Context, input dto.UserCrea
 	}

 	user := model.User{
-		FirstName:   input.FirstName,
-		LastName:    input.LastName,
-		DisplayName: input.DisplayName,
-		Email:       input.Email,
-		Username:    input.Username,
-		IsAdmin:     input.IsAdmin,
-		Locale:      input.Locale,
-		Disabled:    input.Disabled,
-		UserGroups:  userGroups,
+		FirstName:     input.FirstName,
+		LastName:      input.LastName,
+		DisplayName:   input.DisplayName,
+		Email:         input.Email,
+		EmailVerified: input.EmailVerified,
+		Username:      input.Username,
+		IsAdmin:       input.IsAdmin,
+		Locale:        input.Locale,
+		Disabled:      input.Disabled,
+		UserGroups:    userGroups,
 	}
 	if input.LdapID != "" {
 		user.LdapID = &input.LdapID
@@ -309,6 +313,10 @@ func (s *UserService) createUserInternal(ctx context.Context, input dto.UserCrea
 		}
 	}

+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
 	return user, nil
 }

@@ -415,18 +423,25 @@ func (s *UserService) updateUserInternal(ctx context.Context, userID string, upd
 		user.FirstName = updatedUser.FirstName
 		user.LastName = updatedUser.LastName
 		user.DisplayName = updatedUser.DisplayName
-		user.Email = updatedUser.Email
 		user.Username = updatedUser.Username
 		user.Locale = updatedUser.Locale

+		if (user.Email == nil && updatedUser.Email != nil) || (user.Email != nil && updatedUser.Email != nil && *user.Email != *updatedUser.Email) {
+			// Email has changed, reset email verification status
+			user.EmailVerified = s.appConfigService.GetDbConfig().EmailsVerified.IsTrue()
+		}
+
+		user.Email = updatedUser.Email
+
 		// Admin-only fields: Only allow updates when not updating own account
 		if !updateOwnUser {
 			user.IsAdmin = updatedUser.IsAdmin
+			user.EmailVerified = updatedUser.EmailVerified
 			user.Disabled = updatedUser.Disabled
 		}
 	}

-	user.UpdatedAt = utils.Ptr(datatype.DateTime(time.Now()))
+	user.UpdatedAt = new(datatype.DateTime(time.Now()))

 	err = tx.
 		WithContext(ctx).
@@ -447,167 +462,13 @@ func (s *UserService) updateUserInternal(ctx context.Context, userID string, upd
 		return user, err
 	}

+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
 	return user, nil
 }

-func (s *UserService) RequestOneTimeAccessEmailAsAdmin(ctx context.Context, userID string, ttl time.Duration) error {
-	isDisabled := !s.appConfigService.GetDbConfig().EmailOneTimeAccessAsAdminEnabled.IsTrue()
-	if isDisabled {
-		return &common.OneTimeAccessDisabledError{}
-	}
-
-	_, err := s.requestOneTimeAccessEmailInternal(ctx, userID, "", ttl, true)
-	return err
-}
-
-func (s *UserService) RequestOneTimeAccessEmailAsUnauthenticatedUser(ctx context.Context, userID, redirectPath string) (string, error) {
-	isDisabled := !s.appConfigService.GetDbConfig().EmailOneTimeAccessAsUnauthenticatedEnabled.IsTrue()
-	if isDisabled {
-		return "", &common.OneTimeAccessDisabledError{}
-	}
-
-	var userId string
-	err := s.db.Model(&model.User{}).Select("id").Where("email = ?", userID).First(&userId).Error
-	if errors.Is(err, gorm.ErrRecordNotFound) {
-		// Do not return error if user not found to prevent email enumeration
-		return "", nil
-	} else if err != nil {
-		return "", err
-	}
-
-	deviceToken, err := s.requestOneTimeAccessEmailInternal(ctx, userId, redirectPath, 15*time.Minute, true)
-	if err != nil {
-		return "", err
-	} else if deviceToken == nil {
-		return "", errors.New("device token expected but not returned")
-	}
-
-	return *deviceToken, nil
-}
-
-func (s *UserService) requestOneTimeAccessEmailInternal(ctx context.Context, userID, redirectPath string, ttl time.Duration, withDeviceToken bool) (*string, error) {
-	tx := s.db.Begin()
-	defer func() {
-		tx.Rollback()
-	}()
-
-	user, err := s.GetUser(ctx, userID)
-	if err != nil {
-		return nil, err
-	}
-
-	if user.Email == nil {
-		return nil, &common.UserEmailNotSetError{}
-	}
-
-	oneTimeAccessToken, deviceToken, err := s.createOneTimeAccessTokenInternal(ctx, user.ID, ttl, withDeviceToken, tx)
-	if err != nil {
-		return nil, err
-	}
-	err = tx.Commit().Error
-	if err != nil {
-		return nil, err
-	}
-
-	// We use a background context here as this is running in a goroutine
-	//nolint:contextcheck
-	go func() {
-		span := trace.SpanFromContext(ctx)
-		innerCtx := trace.ContextWithSpan(context.Background(), span)
-
-		link := common.EnvConfig.AppURL + "/lc"
-		linkWithCode := link + "/" + oneTimeAccessToken
-
-		// Add redirect path to the link
-		if strings.HasPrefix(redirectPath, "/") {
-			encodedRedirectPath := url.QueryEscape(redirectPath)
-			linkWithCode = linkWithCode + "?redirect=" + encodedRedirectPath
-		}
-
-		errInternal := SendEmail(innerCtx, s.emailService, email.Address{
-			Name:  user.FullName(),
-			Email: *user.Email,
-		}, OneTimeAccessTemplate, &OneTimeAccessTemplateData{
-			Code:              oneTimeAccessToken,
-			LoginLink:         link,
-			LoginLinkWithCode: linkWithCode,
-			ExpirationString:  utils.DurationToString(ttl),
-		})
-		if errInternal != nil {
-			slog.ErrorContext(innerCtx, "Failed to send one-time access token email", slog.Any("error", errInternal), slog.String("address", *user.Email))
-			return
-		}
-	}()
-
-	return deviceToken, nil
-}
-
-func (s *UserService) CreateOneTimeAccessToken(ctx context.Context, userID string, ttl time.Duration) (token string, err error) {
-	token, _, err = s.createOneTimeAccessTokenInternal(ctx, userID, ttl, false, s.db)
-	return token, err
-}
-
-func (s *UserService) createOneTimeAccessTokenInternal(ctx context.Context, userID string, ttl time.Duration, withDeviceToken bool, tx *gorm.DB) (token string, deviceToken *string, err error) {
-	oneTimeAccessToken, err := NewOneTimeAccessToken(userID, ttl, withDeviceToken)
-	if err != nil {
-		return "", nil, err
-	}
-
-	err = tx.WithContext(ctx).Create(oneTimeAccessToken).Error
-	if err != nil {
-		return "", nil, err
-	}
-
-	return oneTimeAccessToken.Token, oneTimeAccessToken.DeviceToken, nil
-}
-
-func (s *UserService) ExchangeOneTimeAccessToken(ctx context.Context, token, deviceToken, ipAddress, userAgent string) (model.User, string, error) {
-	tx := s.db.Begin()
-	defer func() {
-		tx.Rollback()
-	}()
-
-	var oneTimeAccessToken model.OneTimeAccessToken
-	err := tx.
-		WithContext(ctx).
-		Where("token = ? AND expires_at > ?", token, datatype.DateTime(time.Now())).
-		Preload("User").
-		Clauses(clause.Locking{Strength: "UPDATE"}).
-		First(&oneTimeAccessToken).
-		Error
-	if err != nil {
-		if errors.Is(err, gorm.ErrRecordNotFound) {
-			return model.User{}, "", &common.TokenInvalidOrExpiredError{}
-		}
-		return model.User{}, "", err
-	}
-	if oneTimeAccessToken.DeviceToken != nil && deviceToken != *oneTimeAccessToken.DeviceToken {
-		return model.User{}, "", &common.DeviceCodeInvalid{}
-	}
-
-	accessToken, err := s.jwtService.GenerateAccessToken(oneTimeAccessToken.User)
-	if err != nil {
-		return model.User{}, "", err
-	}
-
-	err = tx.
-		WithContext(ctx).
-		Delete(&oneTimeAccessToken).
-		Error
-	if err != nil {
-		return model.User{}, "", err
-	}
-
-	s.auditLogService.Create(ctx, model.AuditLogEventOneTimeAccessTokenSignIn, ipAddress, userAgent, oneTimeAccessToken.User.ID, model.AuditLogData{}, tx)
-
-	err = tx.Commit().Error
-	if err != nil {
-		return model.User{}, "", err
-	}
-
-	return oneTimeAccessToken.User, accessToken, nil
-}
-
 func (s *UserService) UpdateUserGroups(ctx context.Context, id string, userGroupIds []string) (user model.User, err error) {
 	tx := s.db.Begin()
 	defer func() {
@@ -649,9 +510,9 @@ func (s *UserService) UpdateUserGroups(ctx context.Context, id string, userGroup
 	}

 	// Update the UpdatedAt field for all affected groups
-	now := time.Now()
+	now := datatype.DateTime(time.Now())
 	for _, group := range groups {
-		group.UpdatedAt = utils.Ptr(datatype.DateTime(now))
+		group.UpdatedAt = &now
 		err = tx.WithContext(ctx).Save(&group).Error
 		if err != nil {
 			return model.User{}, err
@@ -663,50 +524,13 @@ func (s *UserService) UpdateUserGroups(ctx context.Context, id string, userGroup
 		return model.User{}, err
 	}

+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
 	return user, nil
 }

-func (s *UserService) SignUpInitialAdmin(ctx context.Context, signUpData dto.SignUpDto) (model.User, string, error) {
-	tx := s.db.Begin()
-	defer func() {
-		tx.Rollback()
-	}()
-
-	var userCount int64
-	if err := tx.WithContext(ctx).Model(&model.User{}).Count(&userCount).Error; err != nil {
-		return model.User{}, "", err
-	}
-	if userCount != 0 {
-		return model.User{}, "", &common.SetupAlreadyCompletedError{}
-	}
-
-	userToCreate := dto.UserCreateDto{
-		FirstName:   signUpData.FirstName,
-		LastName:    signUpData.LastName,
-		DisplayName: strings.TrimSpace(signUpData.FirstName + " " + signUpData.LastName),
-		Username:    signUpData.Username,
-		Email:       signUpData.Email,
-		IsAdmin:     true,
-	}
-
-	user, err := s.createUserInternal(ctx, userToCreate, false, tx)
-	if err != nil {
-		return model.User{}, "", err
-	}
-
-	token, err := s.jwtService.GenerateAccessToken(user)
-	if err != nil {
-		return model.User{}, "", err
-	}
-
-	err = tx.Commit().Error
-	if err != nil {
-		return model.User{}, "", err
-	}
-
-	return user, token, nil
-}
-
 func (s *UserService) checkDuplicatedFields(ctx context.Context, user model.User, tx *gorm.DB) error {
 	var result struct {
 		Found bool
@@ -753,180 +577,90 @@ func (s *UserService) ResetProfilePicture(ctx context.Context, userID string) er
 }

 func (s *UserService) disableUserInternal(ctx context.Context, tx *gorm.DB, userID string) error {
-	return tx.
+	err := tx.
 		WithContext(ctx).
 		Model(&model.User{}).
 		Where("id = ?", userID).
 		Update("disabled", true).
 		Error
+
+	if err != nil {
+		return err
+	}
+
+	if s.scimService != nil {
+		s.scimService.ScheduleSync()
+	}
+
+	return nil
 }

-func (s *UserService) CreateSignupToken(ctx context.Context, ttl time.Duration, usageLimit int, userGroupIDs []string) (model.SignupToken, error) {
-	signupToken, err := NewSignupToken(ttl, usageLimit)
+func (s *UserService) SendEmailVerification(ctx context.Context, userID string) error {
+	user, err := s.GetUser(ctx, userID)
 	if err != nil {
-		return model.SignupToken{}, err
+		return err
 	}

-	var userGroups []model.UserGroup
-	err = s.db.WithContext(ctx).
-		Where("id IN ?", userGroupIDs).
-		Find(&userGroups).
-		Error
-	if err != nil {
-		return model.SignupToken{}, err
-	}
-	signupToken.UserGroups = userGroups
-
-	err = s.db.WithContext(ctx).Create(signupToken).Error
-	if err != nil {
-		return model.SignupToken{}, err
+	if user.Email == nil {
+		return &common.UserEmailNotSetError{}
 	}

-	return *signupToken, nil
+	randomToken, err := utils.GenerateRandomAlphanumericString(32)
+	if err != nil {
+		return err
+	}
+
+	expiration := time.Now().Add(24 * time.Hour)
+	emailVerificationToken := &model.EmailVerificationToken{
+		UserID:    user.ID,
+		Token:     randomToken,
+		ExpiresAt: datatype.DateTime(expiration),
+	}
+
+	err = s.db.WithContext(ctx).Create(emailVerificationToken).Error
+	if err != nil {
+		return err
+	}
+
+	return SendEmail(ctx, s.emailService, email.Address{
+		Name:  user.FullName(),
+		Email: *user.Email,
+	}, EmailVerificationTemplate, &EmailVerificationTemplateData{
+		UserFullName:     user.FullName(),
+		VerificationLink: common.EnvConfig.AppURL + "/verify-email?token=" + emailVerificationToken.Token,
+	})
 }

-func (s *UserService) SignUp(ctx context.Context, signupData dto.SignUpDto, ipAddress, userAgent string) (model.User, string, error) {
+func (s *UserService) VerifyEmail(ctx context.Context, userID string, token string) error {
 	tx := s.db.Begin()
-	defer func() {
-		tx.Rollback()
-	}()
+	defer tx.Rollback()

-	tokenProvided := signupData.Token != ""
+	var emailVerificationToken model.EmailVerificationToken
+	err := tx.WithContext(ctx).Where("token = ? AND user_id = ? AND expires_at > ?",
+		token, userID, datatype.DateTime(time.Now())).First(&emailVerificationToken).Error

-	config := s.appConfigService.GetDbConfig()
-	if config.AllowUserSignups.Value != "open" && !tokenProvided {
-		return model.User{}, "", &common.OpenSignupDisabledError{}
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return &common.InvalidEmailVerificationTokenError{}
+	} else if err != nil {
+		return err
 	}

-	var signupToken model.SignupToken
-	var userGroupIDs []string
-	if tokenProvided {
-		err := tx.
-			WithContext(ctx).
-			Preload("UserGroups").
-			Where("token = ?", signupData.Token).
-			Clauses(clause.Locking{Strength: "UPDATE"}).
-			First(&signupToken).
-			Error
-		if err != nil {
-			if errors.Is(err, gorm.ErrRecordNotFound) {
-				return model.User{}, "", &common.TokenInvalidOrExpiredError{}
-			}
-			return model.User{}, "", err
-		}
-
-		if !signupToken.IsValid() {
-			return model.User{}, "", &common.TokenInvalidOrExpiredError{}
-		}
-
-		for _, group := range signupToken.UserGroups {
-			userGroupIDs = append(userGroupIDs, group.ID)
-		}
-	}
-
-	userToCreate := dto.UserCreateDto{
-		Username:     signupData.Username,
-		Email:        signupData.Email,
-		FirstName:    signupData.FirstName,
-		LastName:     signupData.LastName,
-		DisplayName:  strings.TrimSpace(signupData.FirstName + " " + signupData.LastName),
-		UserGroupIds: userGroupIDs,
-	}
-
-	user, err := s.createUserInternal(ctx, userToCreate, false, tx)
+	user, err := s.getUserInternal(ctx, emailVerificationToken.UserID, tx)
 	if err != nil {
-		return model.User{}, "", err
+		return err
 	}

-	accessToken, err := s.jwtService.GenerateAccessToken(user)
+	user.EmailVerified = true
+	user.UpdatedAt = new(datatype.DateTime(time.Now()))
+	err = tx.WithContext(ctx).Save(&user).Error
 	if err != nil {
-		return model.User{}, "", err
+		return err
 	}

-	if tokenProvided {
-		s.auditLogService.Create(ctx, model.AuditLogEventAccountCreated, ipAddress, userAgent, user.ID, model.AuditLogData{
-			"signupToken": signupToken.Token,
-		}, tx)
-
-		signupToken.UsageCount++
-
-		err = tx.WithContext(ctx).Save(&signupToken).Error
-		if err != nil {
-			return model.User{}, "", err
-
-		}
-	} else {
-		s.auditLogService.Create(ctx, model.AuditLogEventAccountCreated, ipAddress, userAgent, user.ID, model.AuditLogData{
-			"method": "open_signup",
-		}, tx)
-	}
-
-	err = tx.Commit().Error
+	err = tx.WithContext(ctx).Delete(&emailVerificationToken).Error
 	if err != nil {
-		return model.User{}, "", err
+		return err
 	}

-	return user, accessToken, nil
-}
-
-func (s *UserService) ListSignupTokens(ctx context.Context, listRequestOptions utils.ListRequestOptions) ([]model.SignupToken, utils.PaginationResponse, error) {
-	var tokens []model.SignupToken
-	query := s.db.WithContext(ctx).Preload("UserGroups").Model(&model.SignupToken{})
-
-	pagination, err := utils.PaginateFilterAndSort(listRequestOptions, query, &tokens)
-	return tokens, pagination, err
-}
-
-func (s *UserService) DeleteSignupToken(ctx context.Context, tokenID string) error {
-	return s.db.WithContext(ctx).Delete(&model.SignupToken{}, "id = ?", tokenID).Error
-}
-
-func NewOneTimeAccessToken(userID string, ttl time.Duration, withDeviceToken bool) (*model.OneTimeAccessToken, error) {
-	// If expires at is less than 15 minutes, use a 6-character token instead of 16
-	tokenLength := 16
-	if ttl <= 15*time.Minute {
-		tokenLength = 6
-	}
-
-	token, err := utils.GenerateRandomUnambiguousString(tokenLength)
-	if err != nil {
-		return nil, err
-	}
-
-	var deviceToken *string
-	if withDeviceToken {
-		dt, err := utils.GenerateRandomAlphanumericString(16)
-		if err != nil {
-			return nil, err
-		}
-		deviceToken = &dt
-	}
-
-	now := time.Now().Round(time.Second)
-	o := &model.OneTimeAccessToken{
-		UserID:      userID,
-		ExpiresAt:   datatype.DateTime(now.Add(ttl)),
-		Token:       token,
-		DeviceToken: deviceToken,
-	}
-
-	return o, nil
-}
-
-func NewSignupToken(ttl time.Duration, usageLimit int) (*model.SignupToken, error) {
-	// Generate a random token
-	randomString, err := utils.GenerateRandomAlphanumericString(16)
-	if err != nil {
-		return nil, err
-	}
-
-	now := time.Now().Round(time.Second)
-	token := &model.SignupToken{
-		Token:      randomString,
-		ExpiresAt:  datatype.DateTime(now.Add(ttl)),
-		UsageLimit: usageLimit,
-		UsageCount: 0,
-	}
-
-	return token, nil
+	return tx.Commit().Error
 }
--- a/backend/internal/service/user_signup_service.go
+++ b/backend/internal/service/user_signup_service.go
@@ -0,0 +1,216 @@
+package service
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"time"
+
+	"github.com/pocket-id/pocket-id/backend/internal/common"
+	"github.com/pocket-id/pocket-id/backend/internal/dto"
+	"github.com/pocket-id/pocket-id/backend/internal/model"
+	datatype "github.com/pocket-id/pocket-id/backend/internal/model/types"
+	"github.com/pocket-id/pocket-id/backend/internal/utils"
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+type UserSignUpService struct {
+	db               *gorm.DB
+	userService      *UserService
+	jwtService       *JwtService
+	auditLogService  *AuditLogService
+	appConfigService *AppConfigService
+}
+
+func NewUserSignupService(db *gorm.DB, jwtService *JwtService, auditLogService *AuditLogService, appConfigService *AppConfigService, userService *UserService) *UserSignUpService {
+	return &UserSignUpService{
+		db:               db,
+		jwtService:       jwtService,
+		auditLogService:  auditLogService,
+		appConfigService: appConfigService,
+		userService:      userService,
+	}
+}
+
+func (s *UserSignUpService) SignUp(ctx context.Context, signupData dto.SignUpDto, ipAddress, userAgent string) (model.User, string, error) {
+	tx := s.db.Begin()
+	defer func() {
+		tx.Rollback()
+	}()
+
+	tokenProvided := signupData.Token != ""
+
+	config := s.appConfigService.GetDbConfig()
+	if config.AllowUserSignups.Value != "open" && !tokenProvided {
+		return model.User{}, "", &common.OpenSignupDisabledError{}
+	}
+
+	var signupToken model.SignupToken
+	var userGroupIDs []string
+	if tokenProvided {
+		err := tx.
+			WithContext(ctx).
+			Preload("UserGroups").
+			Where("token = ?", signupData.Token).
+			Clauses(clause.Locking{Strength: "UPDATE"}).
+			First(&signupToken).
+			Error
+		if err != nil {
+			if errors.Is(err, gorm.ErrRecordNotFound) {
+				return model.User{}, "", &common.TokenInvalidOrExpiredError{}
+			}
+			return model.User{}, "", err
+		}
+
+		if !signupToken.IsValid() {
+			return model.User{}, "", &common.TokenInvalidOrExpiredError{}
+		}
+
+		for _, group := range signupToken.UserGroups {
+			userGroupIDs = append(userGroupIDs, group.ID)
+		}
+	}
+
+	userToCreate := dto.UserCreateDto{
+		Username:      signupData.Username,
+		Email:         signupData.Email,
+		FirstName:     signupData.FirstName,
+		LastName:      signupData.LastName,
+		DisplayName:   strings.TrimSpace(signupData.FirstName + " " + signupData.LastName),
+		UserGroupIds:  userGroupIDs,
+		EmailVerified: s.appConfigService.GetDbConfig().EmailsVerified.IsTrue(),
+	}
+
+	user, err := s.userService.createUserInternal(ctx, userToCreate, false, tx)
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	accessToken, err := s.jwtService.GenerateAccessToken(user)
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	if tokenProvided {
+		s.auditLogService.Create(ctx, model.AuditLogEventAccountCreated, ipAddress, userAgent, user.ID, model.AuditLogData{
+			"signupToken": signupToken.Token,
+		}, tx)
+
+		signupToken.UsageCount++
+
+		err = tx.WithContext(ctx).Save(&signupToken).Error
+		if err != nil {
+			return model.User{}, "", err
+
+		}
+	} else {
+		s.auditLogService.Create(ctx, model.AuditLogEventAccountCreated, ipAddress, userAgent, user.ID, model.AuditLogData{
+			"method": "open_signup",
+		}, tx)
+	}
+
+	err = tx.Commit().Error
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	return user, accessToken, nil
+}
+
+func (s *UserSignUpService) SignUpInitialAdmin(ctx context.Context, signUpData dto.SignUpDto) (model.User, string, error) {
+	tx := s.db.Begin()
+	defer func() {
+		tx.Rollback()
+	}()
+
+	var userCount int64
+	if err := tx.WithContext(ctx).Model(&model.User{}).
+		Where("id != ?", staticApiKeyUserID).
+		Count(&userCount).Error; err != nil {
+		return model.User{}, "", err
+	}
+	if userCount != 0 {
+		return model.User{}, "", &common.SetupAlreadyCompletedError{}
+	}
+
+	userToCreate := dto.UserCreateDto{
+		FirstName:   signUpData.FirstName,
+		LastName:    signUpData.LastName,
+		DisplayName: strings.TrimSpace(signUpData.FirstName + " " + signUpData.LastName),
+		Username:    signUpData.Username,
+		Email:       signUpData.Email,
+		IsAdmin:     true,
+	}
+
+	user, err := s.userService.createUserInternal(ctx, userToCreate, false, tx)
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	token, err := s.jwtService.GenerateAccessToken(user)
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	err = tx.Commit().Error
+	if err != nil {
+		return model.User{}, "", err
+	}
+
+	return user, token, nil
+}
+
+func (s *UserSignUpService) ListSignupTokens(ctx context.Context, listRequestOptions utils.ListRequestOptions) ([]model.SignupToken, utils.PaginationResponse, error) {
+	var tokens []model.SignupToken
+	query := s.db.WithContext(ctx).Preload("UserGroups").Model(&model.SignupToken{})
+
+	pagination, err := utils.PaginateFilterAndSort(listRequestOptions, query, &tokens)
+	return tokens, pagination, err
+}
+
+func (s *UserSignUpService) DeleteSignupToken(ctx context.Context, tokenID string) error {
+	return s.db.WithContext(ctx).Delete(&model.SignupToken{}, "id = ?", tokenID).Error
+}
+
+func (s *UserSignUpService) CreateSignupToken(ctx context.Context, ttl time.Duration, usageLimit int, userGroupIDs []string) (model.SignupToken, error) {
+	signupToken, err := NewSignupToken(ttl, usageLimit)
+	if err != nil {
+		return model.SignupToken{}, err
+	}
+
+	var userGroups []model.UserGroup
+	err = s.db.WithContext(ctx).
+		Where("id IN ?", userGroupIDs).
+		Find(&userGroups).
+		Error
+	if err != nil {
+		return model.SignupToken{}, err
+	}
+	signupToken.UserGroups = userGroups
+
+	err = s.db.WithContext(ctx).Create(signupToken).Error
+	if err != nil {
+		return model.SignupToken{}, err
+	}
+
+	return *signupToken, nil
+}
+
+func NewSignupToken(ttl time.Duration, usageLimit int) (*model.SignupToken, error) {
+	// Generate a random token
+	randomString, err := utils.GenerateRandomAlphanumericString(16)
+	if err != nil {
+		return nil, err
+	}
+
+	now := time.Now().Round(time.Second)
+	token := &model.SignupToken{
+		Token:      randomString,
+		ExpiresAt:  datatype.DateTime(now.Add(ttl)),
+		UsageLimit: usageLimit,
+		UsageCount: 0,
+	}
+
+	return token, nil
+}
--- a/backend/internal/service/version_service.go
+++ b/backend/internal/service/version_service.go
@@ -10,6 +10,7 @@ import (
 	"strings"
 	"time"

+	"github.com/pocket-id/pocket-id/backend/internal/common"
 	"github.com/pocket-id/pocket-id/backend/internal/utils"
 )

@@ -31,6 +32,10 @@ func NewVersionService(httpClient *http.Client) *VersionService {
 }

 func (s *VersionService) GetLatestVersion(ctx context.Context) (string, error) {
+	if common.EnvConfig.VersionCheckDisabled {
+		return "", nil
+	}
+
 	version, err := s.cache.GetOrFetch(ctx, func(ctx context.Context) (string, error) {
 		reqCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
 		defer cancel()
--- a/backend/internal/utils/callback_url_util.go
+++ b/backend/internal/utils/callback_url_util.go
@@ -1,14 +1,31 @@
 package utils

 import (
+	"log/slog"
 	"net"
 	"net/url"
 	"path"
-	"regexp"
+	"strconv"
 	"strings"
+
+	"github.com/dunglas/go-urlpattern"
 )

-// GetCallbackURLFromList returns the first callback URL that matches the input callback URL
+// ValidateCallbackURLPattern checks if the given callback URL pattern
+// is valid according to the rules defined in this package.
+func ValidateCallbackURLPattern(pattern string) error {
+	if pattern == "*" {
+		return nil
+	}
+
+	pattern, _, _ = strings.Cut(pattern, "#")
+	pattern = normalizeToURLPatternStandard(pattern)
+
+	_, err := urlpattern.New(pattern, "", nil)
+	return err
+}
+
+// GetCallbackURLFromList returns the first callback URL that matches the input callback URL.
 func GetCallbackURLFromList(urls []string, inputCallbackURL string) (callbackURL string, err error) {
 	// Special case for Loopback Interface Redirection. Quoting from RFC 8252 section 7.3:
 	// https://datatracker.ietf.org/doc/html/rfc8252#section-7.3
@@ -17,36 +34,55 @@ func GetCallbackURLFromList(urls []string, inputCallbackURL string) (callbackURL
 	//   time of the request for loopback IP redirect URIs, to accommodate
 	//   clients that obtain an available ephemeral port from the operating
 	//   system at the time of the request.
-	loopbackRedirect := ""
-	u, _ := url.Parse(inputCallbackURL)
-
-	if u != nil && u.Scheme == "http" {
-		host := u.Hostname()
-		ip := net.ParseIP(host)
-		if host == "localhost" || (ip != nil && ip.IsLoopback()) {
-			loopbackRedirect = u.String()
-			u.Host = host
-			inputCallbackURL = u.String()
-		}
-	}
+	loopbackCallbackURLWithoutPort := loopbackURLWithWildcardPort(inputCallbackURL)

 	for _, pattern := range urls {
+		// Try the original callback first
 		matches, err := matchCallbackURL(pattern, inputCallbackURL)
 		if err != nil {
 			return "", err
-		} else if !matches {
-			continue
+		}
+		if matches {
+			return inputCallbackURL, nil
 		}

-		if loopbackRedirect != "" {
-			return loopbackRedirect, nil
+		// If we have a loopback variant, try that too
+		if loopbackCallbackURLWithoutPort != "" {
+			matches, err = matchCallbackURL(pattern, loopbackCallbackURLWithoutPort)
+			if err != nil {
+				return "", err
+			}
+			if matches {
+				return inputCallbackURL, nil
+			}
 		}
-		return inputCallbackURL, nil
 	}

 	return "", nil
 }

+func loopbackURLWithWildcardPort(input string) string {
+	u, _ := url.Parse(input)
+
+	if u == nil || u.Scheme != "http" {
+		return ""
+	}
+
+	host := u.Hostname()
+	ip := net.ParseIP(host)
+	if host != "localhost" && (ip == nil || !ip.IsLoopback()) {
+		return ""
+	}
+
+	// For IPv6 loopback hosts, brackets are required when serializing without a port.
+	if strings.Contains(host, ":") {
+		u.Host = "[" + host + "]"
+	} else {
+		u.Host = host
+	}
+	return u.String()
+}
+
 // matchCallbackURL checks if the input callback URL matches the given pattern.
 // It supports wildcard matching for paths and query parameters.
 //
@@ -57,143 +93,176 @@ func matchCallbackURL(pattern string, inputCallbackURL string) (matches bool, er
 		return true, nil
 	}

-	// Strip fragment part
+	// Strip fragment part.
 	// The endpoint URI MUST NOT include a fragment component.
 	// https://datatracker.ietf.org/doc/html/rfc6749#section-3.1.2
 	pattern, _, _ = strings.Cut(pattern, "#")
 	inputCallbackURL, _, _ = strings.Cut(inputCallbackURL, "#")

 	// Store and strip query part
-	var patternQuery url.Values
-	if i := strings.Index(pattern, "?"); i >= 0 {
-		patternQuery, err = url.ParseQuery(pattern[i+1:])
-		if err != nil {
-			return false, err
-		}
-		pattern = pattern[:i]
-	}
-	var inputQuery url.Values
-	if i := strings.Index(inputCallbackURL, "?"); i >= 0 {
-		inputQuery, err = url.ParseQuery(inputCallbackURL[i+1:])
-		if err != nil {
-			return false, err
-		}
-		inputCallbackURL = inputCallbackURL[:i]
-	}
-
-	// Split both pattern and input parts
-	patternParts, patternPath := splitParts(pattern)
-	inputParts, inputPath := splitParts(inputCallbackURL)
-
-	// Verify everything except the path and query parameters
-	if len(patternParts) != len(inputParts) {
-		return false, nil
-	}
-
-	for i, patternPart := range patternParts {
-		matched, err := path.Match(patternPart, inputParts[i])
-		if err != nil || !matched {
-			return false, err
-		}
-	}
-
-	// Verify path with wildcard support
-	matched, err := matchPath(patternPath, inputPath)
-	if err != nil || !matched {
+	pattern, patternQuery, err := extractQueryParams(pattern)
+	if err != nil {
 		return false, err
 	}

-	// Verify query parameters
-	if len(patternQuery) != len(inputQuery) {
+	inputCallbackURL, inputQuery, err := extractQueryParams(inputCallbackURL)
+	if err != nil {
+		return false, err
+	}
+
+	pattern = normalizeToURLPatternStandard(pattern)
+
+	// Validate query params
+	v := validateQueryParams(patternQuery, inputQuery)
+	if !v {
 		return false, nil
 	}

+	// Validate the rest of the URL using urlpattern
+	p, err := urlpattern.New(pattern, "", nil)
+	if err != nil {
+		//nolint:nilerr
+		slog.Warn("invalid callback URL pattern, skipping", "pattern", pattern, "error", err)
+		return false, nil
+	}
+
+	return p.Test(inputCallbackURL, ""), nil
+}
+
+// normalizeToURLPatternStandard converts patterns with single asterisk wildcards and globstar wildcards
+// into a format that can be parsed by the urlpattern package, which uses :param for single segment wildcards
+// and ** for multi-segment wildcards.
+// Additionally, it escapes ":" with a backslash inside IPv6 addresses
+func normalizeToURLPatternStandard(pattern string) string {
+	patternBase, patternPath := extractPath(pattern)
+
+	var result strings.Builder
+	result.Grow(len(pattern) + 5) // Add 5 for some extra capacity, hoping to avoid many re-allocations
+
+	// First, process the base
+
+	// 0 = scheme
+	// 1 = hostname (optionally with username/password) - before IPv6 start (no `[` found)
+	// 2 = is matching IPv6 (until `]`)
+	// 3 = after hostname
+	var step int
+	for i := 0; i < len(patternBase); i++ {
+		switch step {
+		case 0:
+			if i > 3 && patternBase[i] == '/' && patternBase[i-1] == '/' && patternBase[i-2] == ':' {
+				// We just passed the scheme
+				step = 1
+			}
+		case 1:
+			switch patternBase[i] {
+			case '/', ']':
+				// No IPv6, skip to end of this logic
+				step = 3
+			case '[':
+				// Start of IPv6 match
+				step = 2
+			}
+		case 2:
+			if patternBase[i] == '/' || patternBase[i] == ']' || patternBase[i] == '[' {
+				// End of IPv6 match
+				step = 3
+			}
+
+			switch patternBase[i] {
+			case ':':
+				// We are matching an IPv6 block and there's a colon, so escape that
+				result.WriteByte('\\')
+			case '/', ']', '[':
+				// End of IPv6 match
+				step = 3
+			}
+		}
+
+		// Write the byte
+		result.WriteByte(patternBase[i])
+	}
+
+	// Next, process the path
+	for i := 0; i < len(patternPath); i++ {
+		if patternPath[i] == '*' {
+			// Replace globstar with a single asterisk
+			if i+1 < len(patternPath) && patternPath[i+1] == '*' {
+				result.WriteString("*")
+				i++ // skip next *
+			} else {
+				// Replace single asterisk with :p{index}
+				result.WriteString(":p")
+				result.WriteString(strconv.Itoa(i))
+			}
+		} else {
+			// Add the byte
+			result.WriteByte(patternPath[i])
+		}
+	}
+	return result.String()
+}
+
+func extractPath(url string) (base string, path string) {
+	pathStart := -1
+
+	// Look for scheme:// first
+	i := strings.Index(url, "://")
+	if i >= 0 {
+		// Look for the next slash after scheme://
+		rest := url[i+3:]
+		if j := strings.IndexByte(rest, '/'); j >= 0 {
+			pathStart = i + 3 + j
+		}
+	} else {
+		// Otherwise, first slash is path start
+		pathStart = strings.IndexByte(url, '/')
+	}
+
+	if pathStart >= 0 {
+		path = url[pathStart:]
+		base = url[:pathStart]
+	} else {
+		path = ""
+		base = url
+	}
+
+	return base, path
+}
+
+func extractQueryParams(rawUrl string) (base string, query url.Values, err error) {
+	if i := strings.IndexByte(rawUrl, '?'); i >= 0 {
+		query, err = url.ParseQuery(rawUrl[i+1:])
+		if err != nil {
+			return "", nil, err
+		}
+		rawUrl = rawUrl[:i]
+	}
+
+	return rawUrl, query, nil
+}
+
+func validateQueryParams(patternQuery, inputQuery url.Values) bool {
+	if len(patternQuery) != len(inputQuery) {
+		return false
+	}
+
 	for patternKey, patternValues := range patternQuery {
 		inputValues, exists := inputQuery[patternKey]
 		if !exists {
-			return false, nil
+			return false
 		}

 		if len(patternValues) != len(inputValues) {
-			return false, nil
+			return false
 		}

 		for i := range patternValues {
 			matched, err := path.Match(patternValues[i], inputValues[i])
 			if err != nil || !matched {
-				return false, err
+				return false
 			}
 		}
 	}

-	return true, nil
-}
-
-// matchPath matches the input path against the pattern with wildcard support
-// Supported wildcards:
-//
-//	'*'  matches any sequence of characters except '/'
-//	'**' matches any sequence of characters including '/'
-func matchPath(pattern string, input string) (matches bool, err error) {
-	var regexPattern strings.Builder
-	regexPattern.WriteString("^")
-
-	runes := []rune(pattern)
-	n := len(runes)
-
-	for i := 0; i < n; {
-		switch runes[i] {
-		case '*':
-			// Check if it's a ** (globstar)
-			if i+1 < n && runes[i+1] == '*' {
-				// globstar = .* (match slashes too)
-				regexPattern.WriteString(".*")
-				i += 2
-			} else {
-				// single * = [^/]* (no slash)
-				regexPattern.WriteString(`[^/]*`)
-				i++
-			}
-		default:
-			regexPattern.WriteString(regexp.QuoteMeta(string(runes[i])))
-			i++
-		}
-	}
-
-	regexPattern.WriteString("$")
-
-	matched, err := regexp.MatchString(regexPattern.String(), input)
-	return matched, err
-}
-
-// splitParts splits the URL into parts by special characters and returns the path separately
-func splitParts(s string) (parts []string, path string) {
-	split := func(r rune) bool {
-		return r == ':' || r == '/' || r == '[' || r == ']' || r == '@' || r == '.'
-	}
-
-	pathStart := -1
-
-	// Look for scheme:// first
-	if i := strings.Index(s, "://"); i >= 0 {
-		// Look for the next slash after scheme://
-		rest := s[i+3:]
-		if j := strings.IndexRune(rest, '/'); j >= 0 {
-			pathStart = i + 3 + j
-		}
-	} else {
-		// Otherwise, first slash is path start
-		pathStart = strings.IndexRune(s, '/')
-	}
-
-	if pathStart >= 0 {
-		path = s[pathStart:]
-		base := s[:pathStart]
-		parts = strings.FieldsFunc(base, split)
-	} else {
-		parts = strings.FieldsFunc(s, split)
-		path = ""
-	}
-
-	return parts, path
+	return true
 }
--- a/backend/internal/utils/callback_url_util_test.go
+++ b/backend/internal/utils/callback_url_util_test.go
@@ -7,6 +7,142 @@ import (
 	"github.com/stretchr/testify/require"
 )

+func TestValidateCallbackURLPattern(t *testing.T) {
+	tests := []struct {
+		name        string
+		pattern     string
+		shouldError bool
+	}{
+		{
+			name:        "exact URL",
+			pattern:     "https://example.com/callback",
+			shouldError: false,
+		},
+		{
+			name:        "wildcard scheme",
+			pattern:     "*://example.com/callback",
+			shouldError: false,
+		},
+		{
+			name:        "wildcard port",
+			pattern:     "https://example.com:*/callback",
+			shouldError: false,
+		},
+		{
+			name:        "partial wildcard port",
+			pattern:     "https://example.com:80*/callback",
+			shouldError: false,
+		},
+		{
+			name:        "wildcard userinfo",
+			pattern:     "https://user:*@example.com/callback",
+			shouldError: false,
+		},
+		{
+			name:        "glob wildcard",
+			pattern:     "*",
+			shouldError: false,
+		},
+		{
+			name:        "relative URL",
+			pattern:     "/callback",
+			shouldError: true,
+		},
+		{
+			name:        "missing scheme separator",
+			pattern:     "https//example.com/callback",
+			shouldError: true,
+		},
+		{
+			name:        "malformed wildcard host glob",
+			pattern:     "https://exa[mple.com/callback",
+			shouldError: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := ValidateCallbackURLPattern(tt.pattern)
+			if tt.shouldError {
+				require.Error(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+		})
+	}
+}
+
+func TestNormalizeToURLPatternStandard(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "exact URL unchanged",
+			input:    "https://example.com/callback",
+			expected: "https://example.com/callback",
+		},
+		{
+			name:     "single wildcard path segment converted to named parameter",
+			input:    "https://example.com/api/*/callback",
+			expected: "https://example.com/api/:p5/callback",
+		},
+		{
+			name:     "single wildcard in path suffix converted to named parameter",
+			input:    "https://example.com/test*",
+			expected: "https://example.com/test:p5",
+		},
+		{
+			name:     "globstar converted to single asterisk",
+			input:    "https://example.com/**/callback",
+			expected: "https://example.com/*/callback",
+		},
+		{
+			name:     "mixed globstar and single wildcard conversion",
+			input:    "https://example.com/**/v1/**/callback/*",
+			expected: "https://example.com/*/v1/*/callback/:p19",
+		},
+		{
+			name:     "URL without path unchanged",
+			input:    "https://example.com",
+			expected: "https://example.com",
+		},
+		{
+			name:     "relative path conversion",
+			input:    "/foo/*/bar",
+			expected: "/foo/:p5/bar",
+		},
+		{
+			name:     "wildcard in hostname is not normalized by this function",
+			input:    "https://*.example.com/callback",
+			expected: "https://*.example.com/callback",
+		},
+		{
+			name:     "IPv6 hostname escapes all colons inside address",
+			input:    "https://[2001:db8:1:1::a:1]/callback",
+			expected: "https://[2001\\:db8\\:1\\:1\\:\\:a\\:1]/callback",
+		},
+		{
+			name:     "IPv6 hostname with port escapes only address colons",
+			input:    "https://[::1]:8080/callback",
+			expected: "https://[\\:\\:1]:8080/callback",
+		},
+		{
+			name:     "wildcard in query is converted when query is part of input",
+			input:    "https://example.com/callback?code=*",
+			expected: "https://example.com/callback?code=:p15",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.expected, normalizeToURLPatternStandard(tt.input))
+		})
+	}
+}
+
 func TestMatchCallbackURL(t *testing.T) {
 	tests := []struct {
 		name        string
@@ -27,6 +163,18 @@ func TestMatchCallbackURL(t *testing.T) {
 			"https://example.com/callback",
 			false,
 		},
+		{
+			"exact match - IPv4",
+			"https://10.1.0.1/callback",
+			"https://10.1.0.1/callback",
+			true,
+		},
+		{
+			"exact match - IPv6",
+			"https://[2001:db8:1:1::a:1]/callback",
+			"https://[2001:db8:1:1::a:1]/callback",
+			true,
+		},

 		// Scheme
 		{
@@ -111,6 +259,30 @@ func TestMatchCallbackURL(t *testing.T) {
 			"https://example.com:8080/callback",
 			true,
 		},
+		{
+			"wildcard port - IPv4",
+			"https://10.1.0.1:*/callback",
+			"https://10.1.0.1:8080/callback",
+			true,
+		},
+		{
+			"partial wildcard in port prefix - IPv4",
+			"https://10.1.0.1:80*/callback",
+			"https://10.1.0.1:8080/callback",
+			true,
+		},
+		{
+			"wildcard port - IPv6",
+			"https://[2001:db8:1:1::a:1]:*/callback",
+			"https://[2001:db8:1:1::a:1]:8080/callback",
+			true,
+		},
+		{
+			"partial wildcard in port prefix - IPv6",
+			"https://[2001:db8:1:1::a:1]:80*/callback",
+			"https://[2001:db8:1:1::a:1]:8080/callback",
+			true,
+		},

 		// Path
 		{
@@ -131,6 +303,18 @@ func TestMatchCallbackURL(t *testing.T) {
 			"https://example.com/callback",
 			true,
 		},
+		{
+			"wildcard entire path - IPv4",
+			"https://10.1.0.1/*",
+			"https://10.1.0.1/callback",
+			true,
+		},
+		{
+			"wildcard entire path - IPv6",
+			"https://[2001:db8:1:1::a:1]/*",
+			"https://[2001:db8:1:1::a:1]/callback",
+			true,
+		},
 		{
 			"partial wildcard in path prefix",
 			"https://example.com/test*",
@@ -187,12 +371,6 @@ func TestMatchCallbackURL(t *testing.T) {
 			"https://example.com/callback",
 			false,
 		},
-		{
-			"unexpected credentials",
-			"https://example.com/callback",
-			"https://user:pass@example.com/callback",
-			false,
-		},
 		{
 			"wildcard password",
 			"https://user:*@example.com/callback",
@@ -347,7 +525,7 @@ func TestMatchCallbackURL(t *testing.T) {
 			"backslash instead of forward slash",
 			"https://example.com/callback",
 			"https://example.com\\callback",
-			false,
+			true,
 		},
 		{
 			"double slash in hostname (protocol smuggling)",
@@ -370,10 +548,11 @@ func TestMatchCallbackURL(t *testing.T) {
 	}

 	for _, tt := range tests {
-		matches, err := matchCallbackURL(tt.pattern, tt.input)
-		require.NoError(t, err, tt.name)
-		assert.Equal(t, tt.shouldMatch, matches, tt.name)
-
+		t.Run(tt.name, func(t *testing.T) {
+			matches, err := matchCallbackURL(tt.pattern, tt.input)
+			require.NoError(t, err)
+			assert.Equal(t, tt.shouldMatch, matches)
+		})
 	}
 }

@@ -392,6 +571,13 @@ func TestGetCallbackURLFromList_LoopbackSpecialHandling(t *testing.T) {
 			expectedURL:      "http://127.0.0.1:8080/callback",
 			expectMatch:      true,
 		},
+		{
+			name:             "127.0.0.1 with same port - exact match",
+			urls:             []string{"http://127.0.0.1:8080/callback"},
+			inputCallbackURL: "http://127.0.0.1:8080/callback",
+			expectedURL:      "http://127.0.0.1:8080/callback",
+			expectMatch:      true,
+		},
 		{
 			name:             "127.0.0.1 with different port",
 			urls:             []string{"http://127.0.0.1/callback"},
@@ -400,17 +586,24 @@ func TestGetCallbackURLFromList_LoopbackSpecialHandling(t *testing.T) {
 			expectMatch:      true,
 		},
 		{
-			name:             "IPv6 loopback with dynamic port",
+			name:             "IPv6 loopback with dynamic port - exact match",
 			urls:             []string{"http://[::1]/callback"},
 			inputCallbackURL: "http://[::1]:8080/callback",
 			expectedURL:      "http://[::1]:8080/callback",
 			expectMatch:      true,
 		},
 		{
-			name:             "IPv6 loopback without brackets in input",
-			urls:             []string{"http://[::1]/callback"},
-			inputCallbackURL: "http://::1:8080/callback",
-			expectedURL:      "http://::1:8080/callback",
+			name:             "IPv6 loopback with same port - exact match",
+			urls:             []string{"http://[::1]:8080/callback"},
+			inputCallbackURL: "http://[::1]:8080/callback",
+			expectedURL:      "http://[::1]:8080/callback",
+			expectMatch:      true,
+		},
+		{
+			name:             "IPv6 loopback with path match",
+			urls:             []string{"http://[::1]/auth/*"},
+			inputCallbackURL: "http://[::1]:8080/auth/callback",
+			expectedURL:      "http://[::1]:8080/auth/callback",
 			expectMatch:      true,
 		},
 		{
@@ -434,6 +627,20 @@ func TestGetCallbackURLFromList_LoopbackSpecialHandling(t *testing.T) {
 			expectedURL:      "http://127.0.0.1:3000/auth/callback",
 			expectMatch:      true,
 		},
+		{
+			name:             "loopback with path port",
+			urls:             []string{"http://127.0.0.1:*/auth/callback"},
+			inputCallbackURL: "http://127.0.0.1:3000/auth/callback",
+			expectedURL:      "http://127.0.0.1:3000/auth/callback",
+			expectMatch:      true,
+		},
+		{
+			name:             "IPv6 loopback with path port",
+			urls:             []string{"http://[::1]:*/auth/callback"},
+			inputCallbackURL: "http://[::1]:3000/auth/callback",
+			expectedURL:      "http://[::1]:3000/auth/callback",
+			expectMatch:      true,
+		},
 		{
 			name:             "loopback with path mismatch",
 			urls:             []string{"http://127.0.0.1/callback"},
@@ -455,6 +662,13 @@ func TestGetCallbackURLFromList_LoopbackSpecialHandling(t *testing.T) {
 			expectedURL:      "http://127.0.0.1:8080/callback",
 			expectMatch:      true,
 		},
+		{
+			name:             "wildcard matches IPv6 loopback",
+			urls:             []string{"*"},
+			inputCallbackURL: "http://[::1]:8080/callback",
+			expectedURL:      "http://[::1]:8080/callback",
+			expectMatch:      true,
+		},
 	}

 	for _, tt := range tests {
@@ -470,6 +684,76 @@ func TestGetCallbackURLFromList_LoopbackSpecialHandling(t *testing.T) {
 	}
 }

+func TestLoopbackURLWithWildcardPort(t *testing.T) {
+	tests := []struct {
+		name   string
+		input  string
+		output string
+	}{
+		{
+			name:   "localhost http with port strips port",
+			input:  "http://localhost:3000/callback",
+			output: "http://localhost/callback",
+		},
+		{
+			name:   "localhost http without port stays same",
+			input:  "http://localhost/callback",
+			output: "http://localhost/callback",
+		},
+		{
+			name:   "IPv4 loopback with port strips port",
+			input:  "http://127.0.0.1:8080/callback",
+			output: "http://127.0.0.1/callback",
+		},
+		{
+			name:   "IPv4 loopback without port stays same",
+			input:  "http://127.0.0.1/callback",
+			output: "http://127.0.0.1/callback",
+		},
+		{
+			name:   "IPv6 loopback with port strips port and keeps brackets",
+			input:  "http://[::1]:8080/callback",
+			output: "http://[::1]/callback",
+		},
+		{
+			name:   "IPv6 loopback preserves path query and fragment",
+			input:  "http://[::1]:8080/auth/callback?code=123#state",
+			output: "http://[::1]/auth/callback?code=123#state",
+		},
+		{
+			name:   "https loopback returns empty",
+			input:  "https://127.0.0.1:8080/callback",
+			output: "",
+		},
+		{
+			name:   "non loopback host returns empty",
+			input:  "http://example.com:8080/callback",
+			output: "",
+		},
+		{
+			name:   "non loopback IP returns empty",
+			input:  "http://192.168.1.10:8080/callback",
+			output: "",
+		},
+		{
+			name:   "malformed URL returns empty",
+			input:  "http://[::1:8080/callback",
+			output: "",
+		},
+		{
+			name:   "relative URL returns empty",
+			input:  "/callback",
+			output: "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.output, loopbackURLWithWildcardPort(tt.input))
+		})
+	}
+}
+
 func TestGetCallbackURLFromList_MultiplePatterns(t *testing.T) {
 	tests := []struct {
 		name             string
@@ -539,246 +823,3 @@ func TestGetCallbackURLFromList_MultiplePatterns(t *testing.T) {
 		})
 	}
 }
-
-func TestMatchPath(t *testing.T) {
-	tests := []struct {
-		name        string
-		pattern     string
-		input       string
-		shouldMatch bool
-	}{
-		// Exact matches
-		{
-			name:        "exact match",
-			pattern:     "/callback",
-			input:       "/callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "exact mismatch",
-			pattern:     "/callback",
-			input:       "/other",
-			shouldMatch: false,
-		},
-		{
-			name:        "empty paths",
-			pattern:     "",
-			input:       "",
-			shouldMatch: true,
-		},
-
-		// Single wildcard (*)
-		{
-			name:        "single wildcard matches segment",
-			pattern:     "/api/*/callback",
-			input:       "/api/v1/callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "single wildcard doesn't match multiple segments",
-			pattern:     "/api/*/callback",
-			input:       "/api/v1/v2/callback",
-			shouldMatch: false,
-		},
-		{
-			name:        "single wildcard at end",
-			pattern:     "/callback/*",
-			input:       "/callback/test",
-			shouldMatch: true,
-		},
-		{
-			name:        "single wildcard at start",
-			pattern:     "/*/callback",
-			input:       "/api/callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "multiple single wildcards",
-			pattern:     "/*/test/*",
-			input:       "/api/test/callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "partial wildcard prefix",
-			pattern:     "/test*",
-			input:       "/testing",
-			shouldMatch: true,
-		},
-		{
-			name:        "partial wildcard suffix",
-			pattern:     "/*-callback",
-			input:       "/oauth-callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "partial wildcard middle",
-			pattern:     "/api-*-v1",
-			input:       "/api-internal-v1",
-			shouldMatch: true,
-		},
-
-		// Double wildcard (**)
-		{
-			name:        "double wildcard matches multiple segments",
-			pattern:     "/api/**/callback",
-			input:       "/api/v1/v2/v3/callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "double wildcard matches single segment",
-			pattern:     "/api/**/callback",
-			input:       "/api/v1/callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "double wildcard doesn't match when pattern has extra slashes",
-			pattern:     "/api/**/callback",
-			input:       "/api/callback",
-			shouldMatch: false,
-		},
-		{
-			name:        "double wildcard at end",
-			pattern:     "/api/**",
-			input:       "/api/v1/v2/callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "double wildcard in middle",
-			pattern:     "/api/**/v2/**/callback",
-			input:       "/api/v1/v2/v3/v4/callback",
-			shouldMatch: true,
-		},
-
-		// Complex patterns
-		{
-			name:        "mix of single and double wildcards",
-			pattern:     "/*/api/**/callback",
-			input:       "/app/api/v1/v2/callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "wildcard with special characters",
-			pattern:     "/callback-*",
-			input:       "/callback-123",
-			shouldMatch: true,
-		},
-		{
-			name:        "path with query-like string (no special handling)",
-			pattern:     "/callback?code=*",
-			input:       "/callback?code=abc",
-			shouldMatch: true,
-		},
-
-		// Edge cases
-		{
-			name:        "single wildcard matches empty segment",
-			pattern:     "/api/*/callback",
-			input:       "/api//callback",
-			shouldMatch: true,
-		},
-		{
-			name:        "pattern longer than input",
-			pattern:     "/api/v1/callback",
-			input:       "/api",
-			shouldMatch: false,
-		},
-		{
-			name:        "input longer than pattern",
-			pattern:     "/api",
-			input:       "/api/v1/callback",
-			shouldMatch: false,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			matches, err := matchPath(tt.pattern, tt.input)
-			require.NoError(t, err)
-			assert.Equal(t, tt.shouldMatch, matches)
-		})
-	}
-}
-
-func TestSplitParts(t *testing.T) {
-	tests := []struct {
-		name          string
-		input         string
-		expectedParts []string
-		expectedPath  string
-	}{
-		{
-			name:          "simple https URL",
-			input:         "https://example.com/callback",
-			expectedParts: []string{"https", "example", "com"},
-			expectedPath:  "/callback",
-		},
-		{
-			name:          "URL with port",
-			input:         "https://example.com:8080/callback",
-			expectedParts: []string{"https", "example", "com", "8080"},
-			expectedPath:  "/callback",
-		},
-		{
-			name:          "URL with subdomain",
-			input:         "https://api.example.com/callback",
-			expectedParts: []string{"https", "api", "example", "com"},
-			expectedPath:  "/callback",
-		},
-		{
-			name:          "URL with credentials",
-			input:         "https://user:pass@example.com/callback",
-			expectedParts: []string{"https", "user", "pass", "example", "com"},
-			expectedPath:  "/callback",
-		},
-		{
-			name:          "URL without path",
-			input:         "https://example.com",
-			expectedParts: []string{"https", "example", "com"},
-			expectedPath:  "",
-		},
-		{
-			name:          "URL with deep path",
-			input:         "https://example.com/api/v1/callback",
-			expectedParts: []string{"https", "example", "com"},
-			expectedPath:  "/api/v1/callback",
-		},
-		{
-			name:          "URL with path and query",
-			input:         "https://example.com/callback?code=123",
-			expectedParts: []string{"https", "example", "com"},
-			expectedPath:  "/callback?code=123",
-		},
-		{
-			name:          "URL with trailing slash",
-			input:         "https://example.com/",
-			expectedParts: []string{"https", "example", "com"},
-			expectedPath:  "/",
-		},
-		{
-			name:          "URL with multiple subdomains",
-			input:         "https://api.v1.staging.example.com/callback",
-			expectedParts: []string{"https", "api", "v1", "staging", "example", "com"},
-			expectedPath:  "/callback",
-		},
-		{
-			name:          "URL with port and credentials",
-			input:         "https://user:pass@example.com:8080/callback",
-			expectedParts: []string{"https", "user", "pass", "example", "com", "8080"},
-			expectedPath:  "/callback",
-		},
-		{
-			name:          "scheme with authority separator but no slash",
-			input:         "http://example.com",
-			expectedParts: []string{"http", "example", "com"},
-			expectedPath:  "",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			parts, path := splitParts(tt.input)
-			assert.Equal(t, tt.expectedParts, parts, "parts mismatch")
-			assert.Equal(t, tt.expectedPath, path, "path mismatch")
-		})
-	}
-}
--- a/backend/internal/utils/cookie/cookie_names.go
+++ b/backend/internal/utils/cookie/cookie_names.go
@@ -8,7 +8,7 @@ import (

 var AccessTokenCookieName = "__Host-access_token"
 var SessionIdCookieName = "__Host-session"
-var DeviceTokenCookieName = "__Host-device_token" //nolint:gosec
+var DeviceTokenCookieName = "__Secure-device_token" //nolint:gosec

 func init() {
 	if strings.HasPrefix(common.EnvConfig.AppURL, "http://") {
--- a/backend/internal/utils/db_migration_util.go
+++ b/backend/internal/utils/db_migration_util.go
@@ -35,10 +35,17 @@ func MigrateDatabase(sqlDb *sql.DB) error {
 			return fmt.Errorf("database version (%d) is newer than application version (%d), downgrades are not allowed (set ALLOW_DOWNGRADE=true to enable)", currentVersion, requiredVersion)
 		}
 		slog.Info("Fetching migrations from GitHub to handle possible downgrades")
-		return migrateDatabaseFromGitHub(sqlDb, requiredVersion)
+		return migrateDatabaseFromGitHub(sqlDb, requiredVersion, currentVersion)
 	}

-	if err := m.Migrate(requiredVersion); err != nil && !errors.Is(err, migrate.ErrNoChange) {
+	err = m.Migrate(requiredVersion)
+	if err != nil {
+		if errors.Is(err, migrate.ErrNoChange) {
+			return nil
+		}
+		if errors.As(err, &migrate.ErrDirty{}) {
+			return fmt.Errorf("database migration failed. Please create an issue on GitHub and temporarely downgrade to the previous version: %w", err)
+		}
 		return fmt.Errorf("failed to apply embedded migrations: %w", err)
 	}
 	return nil
@@ -85,7 +92,7 @@ func newMigrationDriver(sqlDb *sql.DB, dbProvider common.DbProvider) (driver dat
 }

 // migrateDatabaseFromGitHub applies database migrations fetched from GitHub to handle downgrades.
-func migrateDatabaseFromGitHub(sqlDb *sql.DB, version uint) error {
+func migrateDatabaseFromGitHub(sqlDb *sql.DB, requiredVersion uint, currentVersion uint) error {
 	srcURL := "github://pocket-id/pocket-id/backend/resources/migrations/" + string(common.EnvConfig.DbProvider)

 	driver, err := newMigrationDriver(sqlDb, common.EnvConfig.DbProvider)
@@ -98,9 +105,18 @@ func migrateDatabaseFromGitHub(sqlDb *sql.DB, version uint) error {
 		return fmt.Errorf("failed to create GitHub migration instance: %w", err)
 	}

-	if err := m.Migrate(version); err != nil && !errors.Is(err, migrate.ErrNoChange) {
+	// Reset the dirty state before forcing the version
+	if err := m.Force(int(currentVersion)); err != nil { //nolint:gosec
+		return fmt.Errorf("failed to force database version: %w", err)
+	}
+
+	if err := m.Migrate(requiredVersion); err != nil {
+		if errors.Is(err, migrate.ErrNoChange) {
+			return nil
+		}
 		return fmt.Errorf("failed to apply GitHub migrations: %w", err)
 	}
+
 	return nil
 }

--- a/backend/internal/utils/http_util.go
+++ b/backend/internal/utils/http_util.go
@@ -2,6 +2,7 @@ package utils

 import (
 	"net/http"
+	"net/url"
 	"strconv"
 	"strings"
 	"time"
@@ -21,6 +22,27 @@ func BearerAuth(r *http.Request) (string, bool) {
 	return "", false
 }

+// OAuthClientBasicAuth returns the OAuth client ID and secret provided in the request's
+// Authorization header, if present. See RFC 6749, Section 2.3.
+func OAuthClientBasicAuth(r *http.Request) (clientID, clientSecret string, ok bool) {
+	clientID, clientSecret, ok = r.BasicAuth()
+	if !ok {
+		return "", "", false
+	}
+
+	clientID, err := url.QueryUnescape(clientID)
+	if err != nil {
+		return "", "", false
+	}
+
+	clientSecret, err = url.QueryUnescape(clientSecret)
+	if err != nil {
+		return "", "", false
+	}
+
+	return clientID, clientSecret, true
+}
+
 // SetCacheControlHeader sets the Cache-Control header for the response.
 func SetCacheControlHeader(ctx *gin.Context, maxAge, staleWhileRevalidate time.Duration) {
 	_, ok := ctx.GetQuery("skipCache")
--- a/backend/internal/utils/http_util_test.go
+++ b/backend/internal/utils/http_util_test.go
@@ -63,3 +63,62 @@ func TestBearerAuth(t *testing.T) {
 		})
 	}
 }
+
+func TestOAuthClientBasicAuth(t *testing.T) {
+	tests := []struct {
+		name                 string
+		authHeader           string
+		expectedClientID     string
+		expectedClientSecret string
+		expectedOk           bool
+	}{
+		{
+			name:                 "Valid client ID and secret in header (example from RFC 6749)",
+			authHeader:           "Basic czZCaGRSa3F0Mzo3RmpmcDBaQnIxS3REUmJuZlZkbUl3",
+			expectedClientID:     "s6BhdRkqt3",
+			expectedClientSecret: "7Fjfp0ZBr1KtDRbnfVdmIw",
+			expectedOk:           true,
+		},
+		{
+			name:             "Valid client ID and secret in header (escaped values)",
+			authHeader:       "Basic ZTUwOTcyYmQtNmUzMi00OTU3LWJhZmMtMzU0MTU3ZjI1NDViOislMjUlMjYlMkIlQzIlQTMlRTIlODIlQUM=",
+			expectedClientID: "e50972bd-6e32-4957-bafc-354157f2545b",
+			// This is the example string from RFC 6749, Appendix B.
+			expectedClientSecret: " %&+£€",
+			expectedOk:           true,
+		},
+		{
+			name:                 "Empty auth header",
+			authHeader:           "",
+			expectedClientID:     "",
+			expectedClientSecret: "",
+			expectedOk:           false,
+		},
+		{
+			name:                 "Basic prefix only",
+			authHeader:           "Basic ",
+			expectedClientID:     "",
+			expectedClientSecret: "",
+			expectedOk:           false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			req, err := http.NewRequestWithContext(t.Context(), http.MethodGet, "http://example.com", nil)
+			require.NoError(t, err, "Failed to create request")
+
+			if tt.authHeader != "" {
+				req.Header.Set("Authorization", tt.authHeader)
+			}
+
+			clientId, clientSecret, ok := OAuthClientBasicAuth(req)
+
+			assert.Equal(t, tt.expectedOk, ok)
+
+			if tt.expectedOk {
+				assert.Equal(t, tt.expectedClientID, clientId)
+				assert.Equal(t, tt.expectedClientSecret, clientSecret)
+			}
+		})
+	}
+}
--- a/backend/internal/utils/ip_util.go
+++ b/backend/internal/utils/ip_util.go
@@ -87,9 +87,9 @@ func listContainsIP(ipNets []*net.IPNet, ip net.IP) bool {

 func loadLocalIPv6Ranges() {
 	localIPv6Ranges = nil
-	ranges := strings.Split(common.EnvConfig.LocalIPv6Ranges, ",")
+	ranges := strings.SplitSeq(common.EnvConfig.LocalIPv6Ranges, ",")

-	for _, rangeStr := range ranges {
+	for rangeStr := range ranges {
 		rangeStr = strings.TrimSpace(rangeStr)
 		if rangeStr == "" {
 			continue
--- a/backend/internal/utils/json_util.go
+++ b/backend/internal/utils/json_util.go
@@ -42,7 +42,7 @@ func (d *JSONDuration) UnmarshalJSON(b []byte) error {
 	}
 }

-func UnmarshalJSONFromDatabase(data interface{}, value any) error {
+func UnmarshalJSONFromDatabase(data any, value any) error {
 	switch v := value.(type) {
 	case []byte:
 		return json.Unmarshal(v, data)
--- a/backend/internal/utils/jwk/key_provider.go
+++ b/backend/internal/utils/jwk/key_provider.go
@@ -1,6 +1,7 @@
 package jwk

 import (
+	"context"
 	"fmt"

 	"github.com/lestrrat-go/jwx/v3/jwk"
@@ -17,8 +18,8 @@ type KeyProviderOpts struct {

 type KeyProvider interface {
 	Init(opts KeyProviderOpts) error
-	LoadKey() (jwk.Key, error)
-	SaveKey(key jwk.Key) error
+	LoadKey(ctx context.Context) (jwk.Key, error)
+	SaveKey(ctx context.Context, key jwk.Key) error
 }

 func GetKeyProvider(db *gorm.DB, envConfig *common.EnvConfigSchema, instanceID string) (keyProvider KeyProvider, err error) {
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
ItalyPaleAle	76da41f126	fix: disable callback URLs with protocols "javascript" and "data"	2026-03-26 20:18:13 -07:00
Kyle Mendell	a06d9d21e4	release: 2.5.0	2026-03-26 13:15:22 -05:00
Elias Schneider	cbecbd088f	chore(translations): update translations via Crowdin (#1395 )	2026-03-26 13:02:01 -05:00
Kyle Mendell	3c42a713ce	chore: upgrade dependencies	2026-03-26 12:59:18 -05:00
Kyle Mendell	e7e0176316	chore: upgrade dependencies	2026-03-26 12:57:25 -05:00
Chotow	0551502586	feat: add TRUSTED_PLATFORM environment variable for gin (#1372 )	2026-03-26 12:44:31 -05:00
Kyle Mendell	5251cd9799	chore: ignore linter on app image bootstrap	2026-03-26 12:44:03 -05:00
Raito00	673e5841aa	chore(translations): Improve Latvian translations in lv.json (#1382 )	2026-03-26 12:41:01 -05:00
taoso	dc6558522e	fix: allow one-char username on signup (#1378 )	2026-03-26 12:36:54 -05:00
taoso	724c41cb7a	fix: empty background restore after reboot (#1379 )	2026-03-26 12:33:30 -05:00
Elias Schneider	fc52bd4efb	chore(translations): update translations via Crowdin (#1393 )	2026-03-26 12:32:42 -05:00
dependabot[bot]	2701754e73	chore(deps): bump google.golang.org/grpc from 1.79.1 to 1.79.3 in /backend in the go_modules group across 1 directory (#1391 ) Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-03-26 12:31:40 -05:00
Owen Voke	3700bd942d	feat: add `token_endpoint_auth_methods_supported` to `.well-known` (#1388 )	2026-03-23 12:51:32 -05:00
Alessandro (Ale) Segala	2b5401dd2f	fix: show a warning when SQLite DB is stored on NFS/SMB/FUSE (#1381 )	2026-03-23 12:50:54 -05:00
Chotow	95e9af4bbf	fix: avoid fmt.Sprintf on custom GeoLiteDBUrl without %s placeholder (#1384 )	2026-03-18 12:41:14 +00:00
Kyle Mendell	0c039cc88c	fix: derive LDAP admin access from group membership (#1374 )	2026-03-11 21:13:04 -05:00
taoso	192f71a13c	feat: allow clearing background image (#1290 ) Co-authored-by: Kyle Mendell <kmendell@ofkm.us> Co-authored-by: Kyle Mendell <ksm@ofkm.us>	2026-03-08 14:45:04 -05:00
taoso	f90f21b620	feat: allow use of svg, png, and ico images types for favicon (#1289 ) Co-authored-by: Alessandro (Ale) Segala <43508+ItalyPaleAle@users.noreply.github.com> Co-authored-by: Kyle Mendell <kmendell@ofkm.us>	2026-03-08 19:25:49 +00:00
Alessandro (Ale) Segala	d71966f996	refactor: separate querying LDAP and updating DB during sync (#1371 )	2026-03-08 14:03:58 -05:00
GameTec-live	cad80e7d74	fix: move tooltip inside of form input to prevent shifting (#1369 )	2026-03-08 15:41:08 +01:00
Alessandro (Ale) Segala	832b7fbff4	fix: better error messages when there's another instance of Pocket ID running (#1370 )	2026-03-08 15:37:38 +01:00
Elias Schneider	e3905cf315	ci/cd: add pr quality action	2026-03-08 15:35:23 +01:00
Elias Schneider	b59e35cb59	release: 2.4.0	2026-03-07 18:36:42 +01:00
Elias Schneider	a675d075d1	fix: use URL keyboard type for callback URL inputs	2026-03-07 18:34:57 +01:00
Alessandro (Ale) Segala	2f56d16f98	fix: various fixes in background jobs (#1362 ) Co-authored-by: Elias Schneider <login@eliasschneider.com>	2026-03-07 17:07:26 +00:00
Elias Schneider	f4eb8db509	tests: fix wrong seed data in `database.json`	2026-03-07 18:00:46 +01:00
Elias Schneider	e7bd66d1a7	tests: fix wrong seed data	2026-03-07 17:51:44 +01:00
Elias Schneider	1d06817065	chore(translations): update translations via Crowdin (#1352 )	2026-03-07 17:15:01 +01:00
Ken Watanabe	34890235ba	Merge commit from fork	2026-03-07 16:59:25 +01:00
Alessandro (Ale) Segala	27ca713cd4	fix: one-time-access-token route should get user ID from URL only (#1358 )	2026-03-03 18:53:36 -08:00
Kyle Mendell	e0fc4cc01b	chore(translations): add Latvian files	2026-03-03 15:41:42 -06:00
Kyle Mendell	01141b8c0f	chore(translations): add Português files	2026-03-03 15:39:48 -06:00
taoso	8fecc22888	feat: allow first name and display name to be optional (#1288 ) Co-authored-by: Kyle Mendell <kmendell@ofkm.us>	2026-03-03 21:37:39 +00:00
Copilot	d7f19ad5e5	fix: wildcard callback URLs blocked by browser-native URL validation (#1359 ) Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: ItalyPaleAle <43508+ItalyPaleAle@users.noreply.github.com>	2026-03-03 13:27:27 -08:00
github-actions[bot]	45bcdb4b1d	chore: update AAGUIDs (#1354 ) Co-authored-by: stonith404 <58886915+stonith404@users.noreply.github.com>	2026-03-03 15:22:26 -06:00
Alessandro (Ale) Segala	89349dc1ad	fix: handle IPv6 addresses in callback URLs (#1355 )	2026-03-03 10:52:42 +01:00
Alessandro (Ale) Segala	6159e0bf96	perf: frontend performance optimizations (#1344 )	2026-03-01 13:04:38 -08:00
Alessandro (Ale) Segala	4d22c2dbcf	fix: federated client credentials not working if sub ≠ client_id (#1342 ) Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>	2026-03-01 18:48:20 +01:00
dependabot[bot]	590e495c1d	chore(deps-dev): bump @sveltejs/kit from 2.53.0 to 2.53.3 in the npm_and_yarn group across 1 directory (#1349 )	2026-02-28 09:04:45 -06:00
Elias Schneider	3a339e3319	fix: improve wildcard matching by using `go-urlpattern` (#1332 )	2026-02-28 13:08:35 +00:00
dependabot[bot]	d98db79d5e	chore(deps-dev): bump svelte from 5.53.2 to 5.53.5 in the npm_and_yarn group across 1 directory (#1348 ) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-02-28 13:52:27 +01:00
Elias Schneider	7d2a9b3345	chore(translations): update translations via Crowdin (#1336 )	2026-02-27 08:22:33 -06:00
Elias Schneider	375f0a0c34	release: 2.3.0	2026-02-23 20:36:19 +01:00
Elias Schneider	522a4eee00	chore(translations): update translations via Crowdin (#1335 )	2026-02-23 20:36:00 +01:00
Elias Schneider	0c41872cd4	fix: disallow API key renewal and creation with API key authentication (#1334 )	2026-02-23 20:34:25 +01:00
Elias Schneider	b3fe143136	fix: left align input error messages	2026-02-23 19:54:32 +01:00
Kyle Mendell	a90c8abe51	chore(deps): upgrade to node 24 and go 1.26.0 (#1328 ) Co-authored-by: ItalyPaleAle <43508+ItalyPaleAle@users.noreply.github.com> Co-authored-by: Elias Schneider <login@eliasschneider.com>	2026-02-23 19:50:44 +01:00
Kyle Mendell	ae269371da	feat: current version api endpoint (#1310 )	2026-02-22 10:39:19 -08:00
James Ward	27caaf2cac	feat: add JWT ID for generated tokens (#1322 )	2026-02-22 16:23:14 +00:00
Elias Schneider	0678699d0c	chore: upgrade dependencies	2026-02-22 17:14:57 +01:00
dependabot[bot]	4f82957e13	chore(deps-dev): bump @sveltejs/kit from 2.49.5 to 2.52.2 in the npm_and_yarn group across 1 directory (#1327 ) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-02-22 14:54:01 +01:00
dependabot[bot]	5e2534bd6b	chore(deps-dev): bump svelte from 5.46.4 to 5.51.5 in the npm_and_yarn group across 1 directory (#1324 )	2026-02-20 14:23:55 -06:00
Alessandro (Ale) Segala	eb0456a395	fix: token endpoint must not accept params as query string args (#1321 )	2026-02-17 22:31:09 -06:00
Elias Schneider	f0249377ac	chore(translations): update translations via Crowdin (#1312 )	2026-02-17 15:55:22 -06:00
github-actions[bot]	97f2e4eec2	chore: update AAGUIDs (#1316 ) Co-authored-by: stonith404 <58886915+stonith404@users.noreply.github.com>	2026-02-16 09:54:02 -06:00
Elias Schneider	adbdfcf9ff	chore(translations): update translations via Crowdin (#1307 )	2026-02-10 15:29:08 -06:00
Kyle Mendell	94a48977ba	chore(deps): update dependenicies	2026-02-10 15:26:25 -06:00
dependabot[bot]	5ab0996475	chore(deps): bump axios from 1.13.2 to 1.13.5 in the npm_and_yarn group across 1 directory (#1309 ) Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-02-10 15:25:21 -06:00
Kyle Mendell	60825c5743	chore: run formatter	2026-02-10 15:21:09 -06:00
Cheng Gu	310b81c277	feat: manageability of uncompressed geolite db file (#1234 )	2026-02-10 21:17:06 +00:00
Elias Schneider	549b487663	chore(translations): update translations via Crowdin (#1271 )	2026-02-04 02:21:13 -06:00
Yegor Pomortsev	6eebecd85a	fix: decode URL-encoded client ID and secret in Basic auth (#1263 )	2026-01-24 20:52:17 +00:00
Elias Schneider	1de231f1ff	chore(translations): update translations via Crowdin (#1270 )	2026-01-24 21:46:48 +01:00
Elias Schneider	aab7e364e8	fix: increase rate limit for frontend and api requests	2026-01-24 20:29:50 +01:00
Elias Schneider	56afebc242	feat: add support for HTTP/2	2026-01-24 18:24:34 +01:00
Elias Schneider	bb7b0d5608	fix: add `type="url"` to url inputs	2026-01-24 17:37:54 +01:00
Elias Schneider	80558c5625	chore(translations): add Norwegian language files	2026-01-24 17:33:58 +01:00
Moritz	a5629e63d2	fix: prevent deletion of OIDC provider logo for non admin/anonymous users (#1267 )	2026-01-24 17:23:21 +01:00
github-actions[bot]	317879bb37	chore: update AAGUIDs (#1257 ) Co-authored-by: stonith404 <58886915+stonith404@users.noreply.github.com>	2026-01-20 19:26:25 -06:00
Kyle Mendell	c62533d388	fix: ENCRYPTION_KEY needed for version and help commands (#1256 )	2026-01-18 18:04:53 -06:00
Jasper Bernhardt	0978a89fcc	feat: add VERSION_CHECK_DISABLED environment variable (#1254 )	2026-01-18 17:28:24 -06:00
Kyle Mendell	53ef61a3e5	chore(translations): add Estonian files	2026-01-17 19:42:28 -06:00
Kyle Mendell	4811625cdd	chore: upgrade deps	2026-01-15 18:15:41 -06:00
Kyle Mendell	9dbc02e568	chore(deps): bump devalue to 5.6.2	2026-01-15 18:14:00 -06:00
dependabot[bot]	43a1e4a25b	chore(deps-dev): bump svelte from 5.46.1 to 5.46.4 in the npm_and_yarn group across 1 directory (#1242 ) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-01-15 20:32:39 +00:00
dependabot[bot]	e78b16d0c6	chore(deps-dev): bump @sveltejs/kit from 2.49.2 to 2.49.5 in the npm_and_yarn group across 1 directory (#1240 ) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-01-15 14:23:39 -06:00
Elias Schneider	1967de6828	chore(translations): update translations via Crowdin (#1233 )	2026-01-14 01:17:08 -06:00
Elias Schneider	2c64bebf6a	release: 2.2.0	2026-01-11 15:46:36 +01:00
Elias Schneider	2a11c3e609	fix: use user specific email verified claim instead of global one	2026-01-11 15:46:14 +01:00
Elias Schneider	a0ced2443c	chore(translations): update translations via Crowdin (#1230 )	2026-01-11 15:43:21 +01:00
Elias Schneider	746aa71d67	feat: add static api key env variable (#1229 )	2026-01-11 15:36:27 +01:00
Elias Schneider	9ca3d33c88	feat: add environment variable to disable built-in rate limiting	2026-01-11 14:26:30 +01:00
Elias Schneider	4df4bcb645	fix: db version downgrades don't downgrade db schema	2026-01-11 14:14:44 +01:00
Elias Schneider	875c5b94a6	chore(translations): update translations via Crowdin (#1226 )	2026-01-11 13:01:12 +01:00
Elias Schneider	0e2cdc393e	fix: allow exchanging logic code if already authenticated	2026-01-11 12:59:31 +01:00
Elias Schneider	1e7442f5df	feat: add support for email verification (#1223 )	2026-01-11 12:31:26 +01:00
Elias Schneider	e955118a6f	chore(translations): update translations via Crowdin (#1213 )	2026-01-10 23:19:26 +01:00
Elias Schneider	811e8772b6	feat: add option to renew API key (#1214 )	2026-01-09 12:08:58 +01:00
Elias Schneider	0a94f0fd64	feat: make home page URL configurable (#1215 )	2026-01-07 22:01:51 +01:00
Elias Schneider	03f9be0d12	fix: login codes sent by an admin incorrectly requires a device token	2026-01-07 16:13:18 +01:00
Elias Schneider	2f25861d15	feat: improve passkey error messages	2026-01-07 11:30:37 +01:00
Elias Schneider	2af70d9b4d	feat: add CLI command for encryption key rotation (#1209 )	2026-01-07 09:34:23 +01:00
Elias Schneider	5828fa5779	fix: user can't update account if email is empty	2026-01-06 17:35:47 +01:00
Elias Schneider	1a032a812e	fix: data import from sqlite to postgres fails because of wrong datatype	2026-01-06 16:08:49 +01:00
Elias Schneider	8c68b08c12	fix: allow changing "require email address" if no SMTP credentials present	2026-01-06 14:28:08 +01:00
Elias Schneider	646f849441	release: 2.1.0	2026-01-04 21:18:24 +01:00
Elias Schneider	20bbd4a06f	chore(translations): update translations via Crowdin (#1189 )	2026-01-04 21:17:49 +01:00
Justin Moy	2d7e2ec8df	feat: process nonce within device authorization flow (#1185 ) Co-authored-by: Elias Schneider <login@eliasschneider.com>	2026-01-04 18:18:17 +00:00
Kyle Mendell	72009ced67	feat: add issuer url to oidc client details list (#1197 )	2026-01-04 19:04:16 +01:00
Elias Schneider	4881130ead	refactor: run SCIM jobs in context of gocron instead of custom implementation	2026-01-04 19:00:18 +01:00
Elias Schneider	d6a7b503ff	fix: invalid cookie name for email login code device token	2026-01-03 23:46:44 +01:00
Elias Schneider	3c3916536e	release: 2.0.2	2026-01-03 15:16:46 +01:00
Elias Schneider	a24b2afb7b	chore: add no-op migration to postgres	2026-01-03 15:12:14 +01:00
Elias Schneider	7c34501055	fix: localhost callback URLs with port don't match correctly	2026-01-03 15:07:56 +01:00
Elias Schneider	ba00f40bd4	fix: allow version downgrade database is dirty	2026-01-03 15:06:39 +01:00
Elias Schneider	2f651adf3b	fix: migration fails if users exist with no email address	2026-01-03 15:06:34 +01:00
@@ -1 +1 @@
 .0.1
 .5.0