[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/lib/menuKeys.ts

@@ -14,6 +14,9 @@ export const MenuKeys = {
   Permissions: 'Permissions',
   PurchaseEvaluations: 'PurchaseEvaluations',
   PeWorkflows: 'PeWorkflows',
+  // Quy trình duyệt MỚI (Mig 22 — Session 17, 2026-05-08)
+  ApprovalWorkflowsV2: 'ApprovalWorkflowsV2',
+  AwV2_DuyetNcc: 'AwV2_DuyetNcc',
 } as const
 
 export type MenuKey = typeof MenuKeys[keyof typeof MenuKeys]