feat: add department dashboard

frontend/package.json

@@ -11,6 +11,7 @@
   },
   "dependencies": {
     "@fontsource-variable/geist": "^5.2.8",
+    "@tailwindcss/postcss": "^4.2.1",
     "axios": "^1.13.6",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
@@ -21,6 +22,8 @@
     "react-router-dom": "^7.13.1",
     "shadcn": "^4.0.5",
     "tailwind-merge": "^3.5.0",
+    "tailwindcss": "^4.2.1",
+    "tailwindcss-animate": "^1.0.7",
     "tw-animate-css": "^1.4.0"
   },
   "devDependencies": {
@@ -29,13 +32,11 @@
     "@types/react": "^19.2.7",
     "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^5.1.4",
-    "autoprefixer": "^10.4.27",
     "eslint": "^9.39.1",
     "eslint-plugin-react-hooks": "^7.0.1",
     "eslint-plugin-react-refresh": "^0.4.24",
     "globals": "^16.5.0",
     "postcss": "^8.5.8",
-    "tailwindcss": "^3.4.19",
     "typescript": "~5.9.3",
     "typescript-eslint": "^8.48.0",
     "vite": "^7.3.1"