Remove CRA and use Vite instead

frontend/package.json

@@ -11,23 +11,24 @@
     "@mantine/hooks": "^8.0.1",
     "@mui/icons-material": "^7.1.0",
     "@mui/material": "^7.1.0",
+    "@tailwindcss/postcss": "^4.1.8",
     "@testing-library/dom": "^10.4.0",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.3.0",
     "@testing-library/user-event": "^13.5.0",
+    "autoprefixer": "^10.4.21",
     "axios": "^1.9.0",
     "pdfjs-dist": "^3.11.174",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
     "react-router-dom": "^7.6.0",
-    "react-scripts": "5.0.1",
+    "tailwindcss": "^4.1.8",
     "web-vitals": "^2.1.4"
   },
   "scripts": {
-    "start": "react-scripts start",
-    "build": "react-scripts build",
-    "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
   },
   "eslintConfig": {
     "extends": [
@@ -50,10 +51,12 @@
   "devDependencies": {
     "@types/react": "^19.1.4",
     "@types/react-dom": "^19.1.5",
+    "@vitejs/plugin-react": "^4.5.0",
     "postcss": "^8.5.3",
     "postcss-cli": "^11.0.1",
     "postcss-preset-mantine": "^1.17.0",
     "postcss-simple-vars": "^7.0.1",
-    "typescript": "^5.8.3"
+    "typescript": "^5.8.3",
+    "vite": "^6.3.5"
   }
 }