[CLAUDE] FE-PE: S22+5 Chunk B — Designer checkbox +AllowApproverEditBudget per slot + Section read flag (mirror 2 app)

FE Admin Designer (ApprovalWorkflowsV2Page.tsx):
- LevelDto + EditLevelEntry +allowApproverEditBudget
- copyFromDefinition + makeDefaultLevelEntry propagate default false
- POST body include allowApproverEditBudget cho mỗi Level slot
- NEW checkbox UI per Level inline panel:
  "Cho phép chỉnh sửa Section ngân sách lúc đang duyệt"
  (col-span-2, mirror pattern allowApproverEditDetails Mig 29)

FE Types mirror 2 app:
- fe-admin + fe-user `ApprovalWorkflowOptions` +allowApproverEditBudget

FE BudgetAdjustSection refactor (mirror 2 app):
- Trước: isApproverChoDuyet = phase ChoDuyet + actor in approvers
- Sau: isApproverChoDuyet = phase ChoDuyet + actor in approvers
  + currentLevelOptions.allowApproverEditBudget=true (per slot opt-in)
- Drafter scope Nháp/Trả lại unchanged
- Admin bypass unchanged

UX impact:
- Admin Designer phải tick checkbox cho NV slot mới được edit ngân sách lúc duyệt
- Nếu KHÔNG tick → button "Điều chỉnh" trong Section 5 KHÔNG hiện cho approver
- Drafter vẫn edit bình thường khi phiếu Nháp/Trả lại

Verify:
- npm run build fe-admin — 569ms pass
- npm run build fe-user — 528ms pass

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fe-admin/src/components/pe/PeDetailTabs.tsx

@@ -974,9 +974,13 @@ function BudgetAdjustSection({ ev, readOnly }: { ev: PeDetailBundle; readOnly: b
   const isDrafter = currentUser?.id != null && ev.drafterUserId === currentUser.id
   const isDrafterPhase = ev.phase === PurchaseEvaluationPhase.DangSoanThao
     || ev.phase === PurchaseEvaluationPhase.TraLai
-  // Approver currentLevel match — phase ChoDuyet + actor in current approval level
+  // F4 Approver scope (Mig 30): phase ChoDuyet + actor in currentApproval.approvers
+  // + currentLevel có flag AllowApproverEditBudget=true (admin Designer tick per slot).
   const actorInCurrentLevel = ev.currentApproval?.approvers?.some(a => a.userId === currentUser?.id) ?? false
-  const isApproverChoDuyet = ev.phase === PurchaseEvaluationPhase.ChoDuyet && actorInCurrentLevel
+  const approverEditBudgetAllowed = ev.currentLevelOptions?.allowApproverEditBudget ?? false
+  const isApproverChoDuyet = ev.phase === PurchaseEvaluationPhase.ChoDuyet
+    && actorInCurrentLevel
+    && approverEditBudgetAllowed
 
   const canAdjust = !readOnly && (isAdmin || (isDrafter && isDrafterPhase) || isApproverChoDuyet)