Add Tailwind v4 and shadcn/ui baseline components

frontend/package.json

@@ -28,9 +28,11 @@
     "react": "18.3.1",
     "react-dom": "18.3.1",
     "react-helmet-async": "2.0.5",
-    "tailwind-merge": "2.6.1"
+    "tailwind-merge": "2.6.1",
+    "tw-animate-css": "1.3.0"
   },
   "devDependencies": {
+    "@tailwindcss/vite": "4.1.16",
     "@tanstack/react-query-devtools": "5.100.0",
     "@tanstack/react-router-devtools": "1.166.13",
     "@tanstack/router-plugin": "1.167.22",
@@ -38,10 +40,7 @@
     "@types/react": "18.3.28",
     "@types/react-dom": "18.3.7",
     "@vitejs/plugin-react": "4.7.0",
-    "autoprefixer": "10.5.0",
-    "postcss": "8.5.10",
-    "tailwindcss": "3.4.19",
-    "tailwindcss-animate": "1.0.7",
+    "tailwindcss": "4.1.16",
     "typescript": "5.9.3",
     "vite": "6.4.2"
   },