feat: 完成龙虾记忆同步系统

后端:
- Django + DRF
- PostgreSQL 数据库
- 文件扫描服务
- 差异检查服务
- 完整 REST API

前端:
- React + Ant Design
- 文件树展示
- 差异对比
- API 客户端封装

部署:
- Docker Compose
- 后端 Dockerfile
- 前端 Dockerfile
- 一键启动脚本

功能:
- 扫描龙虾记忆文件
- 检查文件差异
- 双向同步（本地 <-> 数据库）
- 版本历史
- 统计信息

frontend/package.json

@@ -0,0 +1,37 @@
+{
+  "name": "lobster-memory-sync-frontend",
+  "version": "1.0.0",
+  "private": true,
+  "dependencies": {
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "react-scripts": "5.0.1",
+    "antd": "^5.0.0",
+    "react-diff-viewer-continued": "^3.2.6",
+    "axios": "^1.0.0"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  },
+  "proxy": "http://localhost:8087"
+}