[CLAUDE] PurchaseEvaluation: User chọn quy trình duyệt V2 lúc tạo phiếu (Mig 23)

User feedback: thay field "Loại quy trình (theo menu — khóa)" disabled
→ Select dropdown cho User pick quy trình ApprovalWorkflowsV2 (Mig 22)
ngay từ workspace tạo mới. Hiển thị "Mã + Tên + Version".

BE Domain:
- PurchaseEvaluation +ApprovalWorkflowId Guid? (nullable, FK Restrict)
- EF Configuration: Index + FK Restrict to ApprovalWorkflows
- Migration 23 `AddApprovalWorkflowIdToPurchaseEvaluation` (1 ALTER +
  1 IX + 1 FK), applied cả _Design + _Dev LocalDB
- Field WorkflowDefinitionId (Mig 21 legacy) giữ song song để Service
  PE chạy logic cũ tới khi Session sau wire qua schema mới

BE Application:
- CreatePurchaseEvaluationCommand +ApprovalWorkflowId? Guid? optional
  param (default null)
- Validate: nếu set, phải tồn tại + ApplicableType khớp PE.Type
  (DuyetNcc=1 → ApprovalWorkflowApplicableType.DuyetNcc, etc)
- Handler set entity.ApprovalWorkflowId từ request
- UpdatePurchaseEvaluationDraftCommand mirror — cho User đổi quy trình
  khi sửa Nháp/Trả lại (validate same)
- PurchaseEvaluationDetailBundleDto +ApprovalWorkflowId/Code/Name/Version
- GetPurchaseEvaluationByIdQuery handler load workflow info join
- Update Phase guard: cho sửa cả DangSoanThao + TraLai (Trả lại =
  editable per Session 17 spec)

FE (cả 2 app mirror):
- types/purchaseEvaluation.ts: PeDetail +approvalWorkflowId/Code/Name/Version
- PeWorkspaceCreateView.tsx:
  - Replace field disabled "Loại quy trình" → Select bắt buộc
  - useQuery `/api/approval-workflows-v2?applicableType=N` filter theo
    defaultType (1=DuyetNcc / 2=DuyetNccPhuongAn)
  - Display option: "QT-DN-V2-001 v01 — Quy trình Duyệt NCC (đang áp dụng)"
  - List cả version active + archived (UAT cần test compare)
  - Empty state hint amber "Chưa có quy trình, vào /system/approval-workflows-v2"
  - canSubmit require approvalWorkflowId set
  - POST payload include approvalWorkflowId

Verify: dotnet build OK · 81 test pass · npm build × 2 OK · Mig 23 applied
cả 2 LocalDB.

Logic Service PE chưa wire qua ApprovalWorkflowId — vẫn pin
WorkflowDefinitionId Mig 21 legacy chạy. Session sau wire Service iterate
ApprovalWorkflowSteps + match approver theo schema V2 + drop legacy.

src/Backend/SolutionErp.Domain/PurchaseEvaluations/PurchaseEvaluation.cs

@@ -18,7 +18,8 @@ public class PurchaseEvaluation : AuditableEntity
     public string? DiaDiem { get; set; }                             // Lô K, KCN Lộc An...
     public string? MoTa { get; set; }
 
-    public Guid? WorkflowDefinitionId { get; set; }                  // Pinned at create — config y như HĐ
+    public Guid? WorkflowDefinitionId { get; set; }                  // [LEGACY Mig 21] Pinned at create — config y như HĐ
+    public Guid? ApprovalWorkflowId { get; set; }                    // [Mig 23 Session 17] Pin schema mới ApprovalWorkflowsV2
     public DateTime? SlaDeadline { get; set; }
     public bool SlaWarningSent { get; set; }