refactor: 整合财务系统到主应用并重构后端架构

主要变更:
- 将独立的 web-finance 应用整合到 web-antd 主应用中
- 重命名 backend-mock 为 backend,增强后端功能
- 新增财务模块 API 端点(账户、预算、类别、交易)
- 增强财务仪表板和报表功能
- 添加 SQLite 数据存储支持和财务数据导入脚本
- 优化路由结构,删除冗余的 finance-system 模块

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web-antd/package.json

@@ -43,8 +43,11 @@
     "@vueuse/core": "catalog:",
     "ant-design-vue": "catalog:",
     "dayjs": "catalog:",
+    "echarts": "catalog:",
     "pinia": "catalog:",
     "vue": "catalog:",
-    "vue-router": "catalog:"
+    "vue-echarts": "^8.0.0",
+    "vue-router": "catalog:",
+    "xlsx": "^0.18.5"
   }
 }