build: Add automated dependency management for JavaScript libraries

- Sets up Dependabot for JS dependency updates
- Adds GitHub workflow for automated static dependency updates
- Creates update script for Preact and other static JS libraries
- Updates Preact to latest version via new automation

scripts/update-static-deps.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -e
+
+# Directory where libraries are stored
+LIB_DIR="pkg/service/soundtouchweb/static/lib"
+mkdir -p "$LIB_DIR"
+
+echo "Updating static frontend dependencies from node_modules..."
+
+# Ensure dependencies are installed
+if [ ! -d "node_modules" ] || [ ! -d "node_modules/preact" ] || [ ! -d "node_modules/htm" ]; then
+    if [ "$CI" = "true" ]; then
+        echo "node_modules not found or incomplete. Running npm ci in CI environment..."
+        npm ci
+    else
+        echo "node_modules not found or incomplete. Running npm install..."
+        npm install
+    fi
+fi
+
+# Copy files from node_modules
+echo "Copying Preact..."
+cp node_modules/preact/dist/preact.module.js "$LIB_DIR/preact.module.js"
+
+echo "Copying Preact Hooks..."
+cp node_modules/preact/hooks/dist/hooks.module.js "$LIB_DIR/preact-hooks.module.js"
+
+echo "Copying HTM..."
+cp node_modules/htm/dist/htm.module.js "$LIB_DIR/htm.module.js"
+
+echo "All dependencies updated successfully from node_modules."