Use MUI, structure change, fix API

frontend/package.json

@@ -1,45 +0,0 @@
-{
-  "name": "frontend",
-  "version": "1.0.0",
-  "description": "",
-  "source": "src/main.js",
-  "targets": {
-    "default": {
-      "distDir": "../public/assets"
-    }
-  },
-  "scripts": {
-    "watch": "parcel watch",
-    "build": "parcel build"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "MIT",
-  "packageManager": "pnpm@10.5.2",
-  "devDependencies": {
-    "@types/react": "^19.0.10",
-    "@types/react-dom": "^19.0.4",
-    "buffer": "^5.5.0||^6.0.0",
-    "parcel": "^2.13.3",
-    "process": "^0.11.10"
-  },
-  "pnpm": {
-    "onlyBuiltDependencies": [
-      "@parcel/watcher",
-      "@swc/core",
-      "core-js",
-      "deasync",
-      "lmdb",
-      "msgpackr-extract",
-      "parcel-bundler"
-    ]
-  },
-  "dependencies": {
-    "axios": "^1.8.1",
-    "bootstrap": "^5.3.3",
-    "react": "^19.0.0",
-    "react-bootstrap": "^2.10.9",
-    "react-bootstrap-icons": "^1.11.5",
-    "react-dom": "^19.0.0"
-  }
-}