feat: 报销审批流重构与管家计划全链路贯通

- 重构报销状态注册表、审批流路由与平台风险标记
- 完善管家意图规划器与模型计划构建器全链路
- 新增 OCR Worker 脚本、数据库会话管理与通知状态
- 优化文档中心、日志视图、预算中心与员工管理交互
- 增强工作台摘要、图标资源与全局主题样式
- 补充审批路由、状态注册、OCR 服务与管家规划器测试覆盖

server/tests/test_user_agent_service.py

@@ -693,6 +693,66 @@ def test_user_agent_application_submit_blocks_duplicate_business_time() -> None:
         assert second_response.draft_payload is None
 
 
+def test_user_agent_application_submit_blocks_overlapping_travel_dates() -> None:
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        existing_claim = ExpenseClaim(
+            id="application-overlap-1",
+            claim_no="AP-202606050001-OVERLAP",
+            employee_name="pytest",
+            department_name="技术部",
+            expense_type="travel_application",
+            reason="支撑国网部署",
+            location="北京",
+            amount=Decimal("2700.00"),
+            currency="CNY",
+            invoice_count=0,
+            occurred_at=datetime(2026, 6, 5, tzinfo=UTC),
+            status="submitted",
+            approval_stage="直属领导审批",
+            risk_flags_json=[
+                {
+                    "source": "application_detail",
+                    "business_stage": "expense_application",
+                    "application_detail": {
+                        "application_type": "差旅费用申请",
+                        "time": "2026-06-05 至 2026-06-07",
+                        "location": "北京",
+                        "reason": "支撑国网部署",
+                    },
+                }
+            ],
+        )
+        db.add(existing_claim)
+        db.commit()
+
+        response = build_application_user_agent_response(
+            db,
+            "确认提交",
+            context_overrides={
+                "manager_name": "向万红",
+                "application_preview": {
+                    "fields": {
+                        "applicationType": "差旅费用申请",
+                        "time": "2026-06-06 至 2026-06-08",
+                        "location": "北京",
+                        "reason": "支撑国网仿生产部署",
+                        "days": "3天",
+                        "transportMode": "火车",
+                        "amount": "2700元",
+                    }
+                },
+            },
+        )
+
+        claims = db.query(ExpenseClaim).filter(ExpenseClaim.claim_no.like("AP-%")).all()
+        assert len(claims) == 1
+        assert "已存在申请单" in response.answer
+        assert "系统没有重复创建" in response.answer
+        assert existing_claim.claim_no in response.answer
+        assert response.draft_payload is None
+
+
 def test_user_agent_application_edit_resubmits_returned_application_claim() -> None:
     session_factory = build_session_factory()
     with session_factory() as db: