feat(frontend): add Helm chart browser, monitoring, chart-references and values templates pages

Add new frontend pages for the multi-tenant OCDP platform:

- Charts page (/charts): Browse Harbor OCI registries to list Helm chart repositories
  and versions, with deploy modal to launch charts on selected clusters
- Monitoring page (/monitoring): Display cluster metrics (CPU/Memory/GPU usage)
  and per-node details with resource utilization bars
- Chart References page (/chart-references): CRUD for chart metadata references
- Values Templates page (/templates): CRUD for Helm values templates with version
  history and rollback support
- Sidebar: Add Charts navigation, update Storage and Templates links
- api.ts: Add all API client functions (clusterApi, registryApi, instanceApi,
  monitoringApi, storageApi, chartReferenceApi, valuesTemplateApi,
  workspaceApi, userApi) with full TypeScript types

Note: deploy flow and values template rollback not yet end-to-end tested.

frontend/package.json

@@ -1,41 +1,30 @@
 {
-  "name": "ocdp",
+  "name": "frontend",
+  "version": "0.1.0",
   "private": true,
-  "version": "0.0.0",
-  "type": "module",
   "scripts": {
-    "dev": "vite --host",
-    "build": "tsc -b && vite build",
-    "lint": "eslint .",
-    "preview": "vite preview",
-    "openapi-gen": "orval",
-    "openapi-gen-old": "cd .. && make openapi-gen-frontend"
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "eslint"
   },
   "dependencies": {
-    "axios": "^1.13.2",
-    "class-transformer": "^0.5.1",
-    "lucide-react": "^0.545.0",
-    "react": "^19.1.1",
-    "react-dom": "^19.1.1",
-    "react-router-dom": "^7.9.4",
-    "reflect-metadata": "^0.2.2"
+    "axios": "^1.15.0",
+    "clsx": "^2.1.1",
+    "lucide-react": "^1.8.0",
+    "next": "16.2.3",
+    "react": "19.2.4",
+    "react-dom": "19.2.4",
+    "tailwind-merge": "^3.5.0"
   },
   "devDependencies": {
-    "@eslint/js": "^9.36.0",
-    "@types/node": "^24.6.0",
-    "@types/react": "^19.1.16",
-    "@types/react-dom": "^19.1.9",
-    "@vitejs/plugin-react": "^5.0.4",
-    "autoprefixer": "^10.4.21",
-    "eslint": "^9.36.0",
-    "eslint-plugin-react-hooks": "^5.2.0",
-    "eslint-plugin-react-refresh": "^0.4.22",
-    "globals": "^16.4.0",
-    "orval": "^7.3.0",
-    "postcss": "^8.5.6",
-    "tailwindcss": "^3.4.18",
-    "typescript": "~5.9.3",
-    "typescript-eslint": "^8.45.0",
-    "vite": "^7.1.7"
+    "@tailwindcss/postcss": "^4.2.2",
+    "@types/node": "^20",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "eslint": "^9",
+    "eslint-config-next": "16.2.3",
+    "tailwindcss": "^4",
+    "typescript": "^5"
   }
 }