chore: preserve frontend concept lab

frontend/package.json

@@ -7,7 +7,7 @@
     "dev": "vite",
     "build": "tsc -b && vite build",
     "typecheck": "tsc -b",
-    "lint": "eslint src --ext ts,tsx",
+    "lint": "eslint src",
     "test": "vitest",
     "test:run": "vitest run"
   },
@@ -21,7 +21,6 @@
     "radix-ui": "^1.6.1",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "shadcn": "^4.12.0",
     "sonner": "^2.0.7",
     "tailwind-merge": "^2.5.0",
     "tailwindcss-animate": "^1.0.7",
@@ -29,6 +28,7 @@
     "vite": "^6.0.0"
   },
   "devDependencies": {
+    "@eslint/js": "^9.39.5",
     "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.3.2",
     "@testing-library/user-event": "^14.6.1",
@@ -38,10 +38,13 @@
     "@vitejs/plugin-react": "^4.3.0",
     "autoprefixer": "^10.4.20",
     "eslint": "^9.16.0",
+    "globals": "^16.5.0",
     "jsdom": "^26.1.0",
     "postcss": "^8.4.49",
+    "shadcn": "^4.12.0",
     "tailwindcss": "^3.4.16",
     "typescript": "^5.7.0",
+    "typescript-eslint": "^8.63.0",
     "vitest": "^3.2.7"
   }
 }