[CLAUDE] FE-Admin: Designer Quy trình duyệt mới V2 (Chunk C)

Page mới `/system/approval-workflows-v2/:typeCode` mirror Designer cũ
nhưng theo schema Mig 22:
  Bước (Phòng) > N Cấp (mỗi cấp = 1 NV cụ thể qua Select duy nhất)

Files:
- fe-admin/src/pages/system/ApprovalWorkflowsV2Page.tsx (new — 480 LOC)
  - Overview cards (Active version + History list per ApplicableType)
  - DefinitionCard read-only render Bước → Cấp với approver name + email
  - Designer dialog: Mã/Tên/Mô tả + reorder Step/Level (chevron up/down)
    + Add/Remove Step + Add/Remove Level + Select Phòng + Select NV duyệt
  - Validate: mỗi Step phải có ≥1 Level, mỗi Level phải có approverUserId
  - Auto-assign code QT-DN-V2-001 / QT-DN-PA-V2-001 / QT-HD-V2-001
- fe-admin/src/lib/menuKeys.ts (+2 const sync với BE MenuKeys)
- fe-admin/src/components/Layout.tsx (resolver: ApprovalWorkflowsV2 root +
  AwV2_<TypeCode> leaf → /system/approval-workflows-v2/<code>)
- fe-admin/src/App.tsx (import + 2 route)

Verify: npm build fe-admin OK, 1924 modules transformed, 0 TS error.

Next: Chunk D — STATUS + HANDOFF + CLAUDE.md update + final commit.

fe-admin/src/App.tsx

@@ -13,6 +13,7 @@ import { PermissionsPage } from '@/pages/system/PermissionsPage'
 import { RolesPage } from '@/pages/system/RolesPage'
 import { WorkflowsPage } from '@/pages/system/WorkflowsPage'
 import { PeWorkflowsPage } from '@/pages/system/PeWorkflowsPage'
+import { ApprovalWorkflowsV2Page } from '@/pages/system/ApprovalWorkflowsV2Page'
 import { FormsPage } from '@/pages/forms/FormsPage'
 import { ContractsListPage } from '@/pages/contracts/ContractsListPage'
 import { ContractDetailPage } from '@/pages/contracts/ContractDetailPage'
@@ -51,6 +52,9 @@ function App() {
             <Route path="/system/workflows/:typeCode" element={<WorkflowsPage />} />
             <Route path="/system/pe-workflows" element={<PeWorkflowsPage />} />
             <Route path="/system/pe-workflows/:typeCode" element={<PeWorkflowsPage />} />
+            {/* Quy trình duyệt MỚI (Mig 22 — UAT) */}
+            <Route path="/system/approval-workflows-v2" element={<ApprovalWorkflowsV2Page />} />
+            <Route path="/system/approval-workflows-v2/:typeCode" element={<ApprovalWorkflowsV2Page />} />
             <Route path="/forms" element={<FormsPage />} />
             <Route path="/contracts" element={<ContractsListPage />} />
             <Route path="/contracts/new" element={<ContractCreatePage />} />