feat: 添加大纲写作功能与服务器端改进

- 新增 OutlineWriterPanel 和 OutlineResultPanel 组件
- 重构服务器端数据库接口 (server/db.js)
- 添加 LLM 服务模块 (server/llm.js)
- 更新配置和设置面板
- 优化文档选择器和素材面板
- 更新部署文档和环境变量示例

package.json

@@ -20,11 +20,11 @@
     "cors": "^2.8.5",
     "diff-match-patch": "^1.0.5",
     "docx": "^9.5.1",
+    "dotenv": "^16.3.1",
     "express": "^4.18.2",
     "file-saver": "^2.0.5",
     "marked": "^9.1.0",
     "pinia": "^2.1.0",
-    "sql.js": "^1.13.0",
     "vue": "^3.4.0"
   },
   "devDependencies": {
@@ -32,10 +32,9 @@
     "@vitejs/plugin-vue": "^4.5.0",
     "autoprefixer": "^10.4.23",
     "concurrently": "^8.2.0",
-    "dotenv": "^16.3.1",
     "playwright": "^1.57.0",
     "postcss": "^8.5.6",
     "tailwindcss": "^4.1.18",
     "vite": "^5.0.0"
   }
-}
+}