feat: 初始化项目结构并添加核心功能模块

- 新增文档模板和导航结构
- 实现服务器基础API路由和控制器
- 添加扩展插件配置和前端框架
- 引入多租户和权限管理模块
- 集成日志和数据库配置
- 添加核心业务模型和类型定义

archive/handover/approval-center.md

@@ -0,0 +1,34 @@
+# Frontend Integration: Approval Center (通用审批中心)
+
+## 🎨 UI Layout Sketch
+- **Page Path**: `/governance/approval`
+- **Component Structure**:
+  - `ApprovalSummary`: Top metrics (Pending Approvals, Approved, Rejected).
+  - `ApprovalTabs`: "My Pending", "My History", "All (Admin only)".
+  - `ApprovalCardList`: Grid showing:
+    - Type icon (e.g., `HIGH_VALUE_ORDER` in red, `PRICE_CHANGE` in blue).
+    - Status Badge (e.g., `PENDING` in orange, `APPROVED` in green).
+    - Stage indicator: `Stage 1/2` (Manager), `Stage 2/2` (Finance).
+    - Requester & Date.
+    - Resource ID & Description.
+  - `ApprovalDetailModal`:
+    - Full details (Metadata, Amount, etc.).
+    - Decision log (who approved which stage).
+    - Decision Narrative from `DecisionExplainabilityEngine`.
+    - "Approve", "Reject", "Comment" actions.
+
+## 🔄 Interaction State Machine
+- `INITIAL`: Fetching pending requests.
+- `PENDING`: Request listed for approver.
+- `STAGE_TRANSITION`: Request moving from Stage 1 to Stage 2.
+- `APPROVED`: Final approval reached.
+- `REJECTED`: Request terminated at any stage.
+
+## 🔗 API Mapping
+- `GET /api/v1/approval/pending`: Fetches `cf_approval_requests` with `status=PENDING`.
+- `POST /api/v1/approval/approve`: Triggers `ApprovalService.approve`.
+- `GET /api/v1/approval/history`: Fetches `cf_approval_requests` with `status=APPROVED|REJECTED`.
+
+## 📈 ROI Visualization
+- "Compliance Audit Trail": 100% visibility of sensitive actions.
+- "Approval Latency": Average time from request to final decision.