Add foundational UI components (sidebar, some basic navigation)

internal_frontend/package.json

@@ -9,6 +9,12 @@
     "lint": "next lint"
   },
   "dependencies": {
+    "@radix-ui/react-collapsible": "^1.1.11",
+    "@radix-ui/react-dialog": "^1.1.14",
+    "@radix-ui/react-dropdown-menu": "^2.1.15",
+    "@radix-ui/react-separator": "^1.1.7",
+    "@radix-ui/react-slot": "^1.2.3",
+    "@radix-ui/react-tooltip": "^1.2.7",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "lucide-react": "^0.525.0",