[CLAUDE] Workflow: wire ApproveV2 + LevelOpinions cho 4 WorkflowApps module (Phase 11 P11-A)

Wire full approval workflow V2 cho Leave/OT/Travel/Vehicle — cookie-cutter
mirror Proposal (Mig 38). Trước đây skeleton Phase 1 (Create+List), giờ
ApproveV2 advance-level + UPSERT LevelOpinion + atomic codegen.

Schema (Mig 41 WireWorkflowAppsApprovalV2 — 84→89 tables, pure additive):
- 4 bảng {Leave,Ot,Travel,Vehicle}LevelOpinions (UNIQUE composite + Cascade
  parent + Restrict Level — mirror ProposalLevelOpinion)
- 1 bảng WorkflowAppCodeSequences (shared atomic MaDonTu, Prefix-keyed)
- 4 cột RejectedFromStatus (smart return tracking)
- enum ApprovalWorkflowApplicableType.TravelRequest = 9

Application (LeaveOt + TravelVehicle ApprovalFeatures.cs — 30 handler):
- GetById detail (Include LevelOpinions + JOIN Step/Level) · UpdateDraft
- Submit (gen MaDonTu + DaGuiDuyet + level=1, verify ApplicableType per module)
- Approve (verify actor==ApproverUserId OR Admin, UPSERT opinion latest-write-wins,
  advance level OR terminal DaDuyet, empty comment → placeholder)
- Reject (→TuChoi) · Return (→TraLai + RejectedFromStatus)

Api: 4 controller +6 route mỗi cái (GET/{id}, PUT/{id}, submit/approve/reject/return)
Infra: DbInitializer seed 4 workflow V2 mẫu (QT-NP/OT/CT/XE-V2-001) → UAT test ngay
FE: WorkflowAppDetailPage.tsx declarative 4-kind (fe-admin+fe-user SHA256 identical)
  — workflow status + opinion timeline + action buttons; gỡ banner skeleton + row nav

Tests: +11 WorkflowAppApproveV2Tests (130→141 PASS) — state machine + UPSERT
  invariant + guards + codegen + forbidden + placeholder (Leave full + Ot smoke)

Verify: build 0 error · 141 test PASS · FE build ×2 · reviewer checklist
  (ApplicableType per-module + cross-module DbSet + [Authorize] — no copy-paste bug)
Known-minor (unreachable): Reject/Return actor-check skip nếu CurrentApprovalLevelOrder
  null — nhưng DaGuiDuyet luôn có set (defer hardening).
ItTicket KHÔNG đụng (kanban, no workflow V2).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fe-user/src/App.tsx

@@ -29,6 +29,7 @@ import { ProposalCreatePage } from '@/pages/office/ProposalCreatePage'
 import { ProposalDetailPage } from '@/pages/office/ProposalDetailPage'
 import { ProposalsListPage } from '@/pages/office/ProposalsListPage'
 import { WorkflowAppsListPage } from '@/pages/office/WorkflowAppsListPage'
+import { WorkflowAppDetailPage } from '@/pages/office/WorkflowAppDetailPage'
 import { ItTicketsPage } from '@/pages/office/ItTicketsPage'
 import { MyAttendancePage } from '@/pages/office/MyAttendancePage'
 import { HrmDashboardPage } from '@/pages/hrm/HrmDashboardPage'
@@ -79,6 +80,7 @@ function App() {
             <Route path="/proposals/new" element={<ProposalCreatePage />} />
             <Route path="/proposals/:id" element={<ProposalDetailPage />} />
             <Route path="/workflow-apps/:kind" element={<WorkflowAppsListPage />} />
+            <Route path="/workflow-apps/:kind/:id" element={<WorkflowAppDetailPage />} />
             <Route path="/it-tickets" element={<ItTicketsPage />} />
             <Route path="/attendance" element={<MyAttendancePage />} />
             <Route path="/hr/dashboard" element={<HrmDashboardPage />} />