优化: 移除死代码(backend/useStore)与过期类型依赖,引入 marked/dompurify/vitest

package.json

@@ -9,22 +9,25 @@
     "dev:web": "vite --mode web",
     "build": "vue-tsc -b && vite build",
     "preview": "vite preview",
+    "test": "vitest run",
     "tauri": "tauri",
     "tauri:dev": "tauri dev",
     "tauri:build": "tauri build"
   },
   "dependencies": {
     "@tauri-apps/api": "^2.11.1",
+    "dompurify": "^3.4.14",
     "mammoth": "^1.12.0",
+    "marked": "^18.0.10",
     "pdfjs-dist": "^5.6.205",
     "vue": "^3.5.13"
   },
   "devDependencies": {
     "@tauri-apps/cli": "^2.11.4",
-    "@types/pdfjs-dist": "^2.10.377",
     "@vitejs/plugin-vue": "^5.2.1",
     "typescript": "~5.6.3",
     "vite": "^6.0.5",
+    "vitest": "^4.1.11",
     "vue-tsc": "^2.2.0"
   }
 }