style: standardize UI across tools, optimize QR layout, and configure Husky/ESLint

package.json

@@ -7,8 +7,10 @@
     "dev": "vite",
     "build": "vite build",
     "preview": "vite preview",
+    "lint": "eslint .",
     "pack-extension": "node scripts/pack_crx.js",
-    "postinstall": "mkdir -p public/wasm && cp node_modules/zxing-wasm/dist/reader/zxing_reader.wasm public/wasm/"
+    "postinstall": "mkdir -p public/wasm && cp node_modules/zxing-wasm/dist/reader/zxing_reader.wasm public/wasm/",
+    "prepare": "husky"
   },
   "dependencies": {
     "barcode-detector": "^3.1.0",
@@ -19,7 +21,12 @@
     "vue-router": "^5.0.3"
   },
   "devDependencies": {
+    "@eslint/js": "^10.0.1",
     "@vitejs/plugin-vue": "^6.0.2",
+    "eslint": "^10.0.2",
+    "eslint-plugin-vue": "^10.8.0",
+    "globals": "^17.4.0",
+    "husky": "^9.1.7",
     "vite": "^7.3.1",
     "vite-plugin-pwa": "^1.2.0"
   }