feat(web): 班次管理 Web UI — Phase 2a-2

新增班次管理前端页面，接入后端 12 条孤立路由：
- API 模块: shifts.ts（班次 CRUD + 患者分配 + 批量分配 + 交接日志）
- 列表页: ShiftList.tsx（日期/班次/状态筛选 + 统计概览）
- 详情页: ShiftDetail.tsx（班次信息 + 患者分配 Tab + 交接记录 Tab）
- 路由注册: /health/shifts + /health/shifts/:id

权限: health.shifts.list / health.shifts.manage

apps/web/src/App.tsx

@@ -55,6 +55,8 @@ const ActionInbox = lazy(() => import('./pages/health/ActionInbox'));
 const FollowUpTemplateList = lazy(() => import('./pages/health/FollowUpTemplateList'));
 const CarePlanList = lazy(() => import('./pages/health/CarePlanList'));
 const CarePlanDetail = lazy(() => import('./pages/health/CarePlanDetail'));
+const ShiftList = lazy(() => import('./pages/health/ShiftList'));
+const ShiftDetail = lazy(() => import('./pages/health/ShiftDetail'));
 
 // 内容管理
 const ArticleManageList = lazy(() => import('./pages/health/ArticleManageList'));
@@ -275,6 +277,8 @@ export default function App() {
                       <Route path="/health/follow-up-templates" element={<FollowUpTemplateList />} />
                       <Route path="/health/care-plans" element={<CarePlanList />} />
                       <Route path="/health/care-plans/:id" element={<CarePlanDetail />} />
+                      <Route path="/health/shifts" element={<ShiftList />} />
+                      <Route path="/health/shifts/:id" element={<ShiftDetail />} />
                       {/* 内容管理 */}
                       <Route path="/health/articles" element={<ArticleManageList />} />
                       <Route path="/health/articles/new" element={<ArticleEditor />} />