[Feature] Add Docker kubectl support and cluster connectivity + Apply Prettier formatting to frontend files

webapp/backend/Dockerfile

@@ -23,6 +23,13 @@ RUN apk update && apk add --no-cache \
     musl-dev \
     && rm -rf /var/cache/apk/*
 
+# Install kubectl (statically compiled Go binary — works on Alpine/musl)
+RUN ARCH=$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/') && \
+    KUBECTL_VERSION=$(curl -fsSL https://dl.k8s.io/release/stable.txt) && \
+    curl -fsSL -o /usr/local/bin/kubectl \
+        "https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/${ARCH}/kubectl" && \
+    chmod +x /usr/local/bin/kubectl
+
 # Copy Helm from first stage
 COPY --from=helm /usr/bin/helm /usr/local/bin/helm
 

webapp/docker-compose.yml

@@ -43,8 +43,13 @@ services:
     volumes:
       # Persist logs outside container
       - ./backend/logs:/app/logs
+      # Mount host kubeconfig so kubectl can reach the cluster started on the host
+      - ${HOME}/.kube:/root/.kube:ro
+      # Mount minikube certs at the same absolute path as on the host (kubeconfig references them by absolute path)
+      - ${HOME}/.minikube:${HOME}/.minikube:ro
     networks:
       - kubediagrams-network
+      - minikube
     restart: unless-stopped
     healthcheck:
       test: ["CMD", "curl", "--fail", "--silent", "http://localhost:5000/api/health"]
@@ -59,3 +64,5 @@ services:
 networks:
   kubediagrams-network:
     driver: bridge
+  minikube:
+    external: true

webapp/frontend/src/components/common/HistoryPanel.jsx

@@ -121,9 +121,7 @@ const HistoryPanel = ({ history, onRestore, onRemove, onClear, isOpen, onToggle
                   <div className="flex flex-col items-center justify-center h-full text-slate-500">
                     <FileText className="w-16 h-16 mb-4 opacity-50" />
                     <p className="text-center">No diagrams in history</p>
-                    <p className="text-xs text-center mt-2">
-                      Generated diagrams will appear here
-                    </p>
+                    <p className="text-xs text-center mt-2">Generated diagrams will appear here</p>
                   </div>
                 ) : (
                   history.map((item) => (

webapp/frontend/src/components/tabs/ClusterTab/ClusterInput.jsx

@@ -80,7 +80,10 @@ function ClusterInput({
               <label className="block text-sm font-medium text-white">Namespace</label>
               <button
                 type="button"
-                onClick={() => { fetchNamespaces(); fetchContext(); }}
+                onClick={() => {
+                  fetchNamespaces();
+                  fetchContext();
+                }}
                 disabled={loadingNamespaces}
                 className="text-xs text-blue-400 hover:text-blue-300 flex items-center gap-1"
               >
@@ -175,9 +178,12 @@ function ClusterInput({
                 : `${availableResourceTypes.length} types known by the cluster`}
               {namespace && !allNamespaces && !resourceTypeSearch && (
                 <span>
-                  {' '}— resources tagged{' '}
-                  <span className="text-purple-400 font-medium">cluster</span> are not bound to a
-                  namespace but can still be included (e.g. nodes for pod placement).
+                  {' '}
+                  — resources tagged <span className="text-purple-400 font-medium">
+                    cluster
+                  </span>{' '}
+                  are not bound to a namespace but can still be included (e.g. nodes for pod
+                  placement).
                 </span>
               )}
             </p>
@@ -262,7 +268,9 @@ function ClusterInput({
               </>
             )}
           </div>
-          <p className={`text-xs mt-1 ${resourceTypes.length === 0 ? 'text-yellow-400' : 'text-gray-400'}`}>
+          <p
+            className={`text-xs mt-1 ${resourceTypes.length === 0 ? 'text-yellow-400' : 'text-gray-400'}`}
+          >
             {resourceTypes.length > 0
               ? `${resourceTypes.length} type${resourceTypes.length > 1 ? 's' : ''} selected`
               : 'No types selected — please select at least one resource type.'}
@@ -307,12 +315,10 @@ function ClusterInput({
                 <>
                   <strong>No cluster detected.</strong> Start your cluster, then click{' '}
                   <strong>Refresh</strong>:
-                  <br />• minikube:{' '}
-                  <code className="bg-gray-800 px-1 rounded">minikube start</code>
+                  <br />• minikube: <code className="bg-gray-800 px-1 rounded">minikube start</code>
                   <br />• kind:{' '}
                   <code className="bg-gray-800 px-1 rounded">kind create cluster</code>
-                  <br />• k3d:{' '}
-                  <code className="bg-gray-800 px-1 rounded">k3d cluster create</code>
+                  <br />• k3d: <code className="bg-gray-800 px-1 rounded">k3d cluster create</code>
                   <br />
                   Make sure <code className="bg-gray-800 px-1 rounded">kubectl</code> is installed
                   and your kubeconfig points to the right context.
@@ -406,4 +412,4 @@ ClusterInput.propTypes = {
   handleNamespaceChange: PropTypes.func.isRequired,
 };
 
-export default ClusterInput;
+export default ClusterInput;

webapp/frontend/src/hooks/useClusterData.js

@@ -136,8 +136,7 @@ export function useClusterData({
     const commons = availableResourceTypes.filter((rt) => rt.isCommon);
     // With a specific namespace, default to namespaced commons only — cluster-scoped
     // resources (nodes, storageclasses…) can still be added manually.
-    const selected =
-      namespace && !allNamespaces ? commons.filter((rt) => rt.namespaced) : commons;
+    const selected = namespace && !allNamespaces ? commons.filter((rt) => rt.namespaced) : commons;
     setResourceTypes(selected.map((rt) => rt.name));
   };
 
@@ -226,4 +225,4 @@ export function useClusterData({
     handleAllNamespacesToggle,
     handleNamespaceChange,
   };
-}
+}

webapp/frontend/src/services/diagramApi.js

@@ -306,7 +306,6 @@ export async function getClusterResourceTypes() {
   }
 }
 
-
 /**
  * Submit user feedback
  * @param {Object} params - Feedback parameters