[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.Application/PurchaseEvaluations/Dtos/PurchaseEvaluationDtos.cs

@@ -129,6 +129,12 @@ public record PurchaseEvaluationDetailBundleDto(
     BudgetSummaryDto? Budget,
     string? BudgetManualName,
     decimal? BudgetManualAmount,
+    // Mig 23 — schema mới ApprovalWorkflowsV2 pin lúc create. Hiển thị Code +
+    // Name + Version để FE show "QT-DN-V2-001 - Quy trình Duyệt NCC (v01)".
+    Guid? ApprovalWorkflowId,
+    string? ApprovalWorkflowCode,
+    string? ApprovalWorkflowName,
+    int? ApprovalWorkflowVersion,
     List<PurchaseEvaluationSupplierDto> Suppliers,
     List<PurchaseEvaluationDetailDto> Details,
     List<PurchaseEvaluationApprovalDto> Approvals,

src/Backend/SolutionErp.Application/PurchaseEvaluations/PurchaseEvaluationFeatures.cs

@@ -25,7 +25,8 @@ public record CreatePurchaseEvaluationCommand(
     string? PaymentTerms,
     Guid? BudgetId,
     string? BudgetManualName,
-    decimal? BudgetManualAmount) : IRequest<Guid>;
+    decimal? BudgetManualAmount,
+    Guid? ApprovalWorkflowId = null) : IRequest<Guid>;     // [Mig 23] User chọn quy trình duyệt V2 lúc tạo
 
 public class CreatePurchaseEvaluationCommandValidator : AbstractValidator<CreatePurchaseEvaluationCommand>
 {
@@ -57,6 +58,23 @@ public class CreatePurchaseEvaluationCommandHandler(
             .Select(w => (Guid?)w.Id)
             .FirstOrDefaultAsync(ct);
 
+        // Validate ApprovalWorkflowId V2 (Mig 23) — User chọn lúc create.
+        // Phải tồn tại + ApplicableType khớp với PE.Type.
+        if (request.ApprovalWorkflowId is Guid awId)
+        {
+            var aw = await db.ApprovalWorkflows.AsNoTracking()
+                .FirstOrDefaultAsync(w => w.Id == awId, ct)
+                ?? throw new NotFoundException("ApprovalWorkflow", awId);
+            var expectedType = request.Type switch
+            {
+                PurchaseEvaluationType.DuyetNcc => Domain.ApprovalWorkflowsV2.ApprovalWorkflowApplicableType.DuyetNcc,
+                PurchaseEvaluationType.DuyetNccPhuongAn => Domain.ApprovalWorkflowsV2.ApprovalWorkflowApplicableType.DuyetNccPhuongAn,
+                _ => throw new ConflictException($"PurchaseEvaluationType {request.Type} chưa map sang ApprovalWorkflowApplicableType."),
+            };
+            if (aw.ApplicableType != expectedType)
+                throw new ConflictException($"Quy trình {aw.Code} áp dụng cho {aw.ApplicableType}, không khớp với loại phiếu {request.Type}.");
+        }
+
         // Validate Budget link (nếu có): cùng Project + Phase=DaDuyet (chỉ cho
         // pick ngân sách đã duyệt mới được dùng làm reference đối chiếu).
         if (request.BudgetId is Guid bid)
@@ -81,6 +99,7 @@ public class CreatePurchaseEvaluationCommandHandler(
             MoTa = request.MoTa,
             DrafterUserId = currentUser.UserId,
             WorkflowDefinitionId = activeWfId,
+            ApprovalWorkflowId = request.ApprovalWorkflowId,         // Mig 23 — schema mới V2
             PaymentTerms = request.PaymentTerms,
             BudgetId = request.BudgetId,
             BudgetManualName = request.BudgetManualName,
@@ -120,7 +139,8 @@ public record UpdatePurchaseEvaluationDraftCommand(
     string? PaymentTerms,
     Guid? BudgetId,
     string? BudgetManualName,
-    decimal? BudgetManualAmount) : IRequest;
+    decimal? BudgetManualAmount,
+    Guid? ApprovalWorkflowId = null) : IRequest;     // [Mig 23] cho User đổi quy trình khi sửa Nháp
 
 public class UpdatePurchaseEvaluationDraftCommandHandler(
     IApplicationDbContext db,
@@ -131,8 +151,25 @@ public class UpdatePurchaseEvaluationDraftCommandHandler(
         var entity = await db.PurchaseEvaluations.FirstOrDefaultAsync(x => x.Id == request.Id, ct)
             ?? throw new NotFoundException("PurchaseEvaluation", request.Id);
 
-        if (entity.Phase != PurchaseEvaluationPhase.DangSoanThao)
-            throw new ConflictException("Chỉ sửa được phiếu khi ở phase Đang soạn thảo.");
+        if (entity.Phase != PurchaseEvaluationPhase.DangSoanThao
+            && entity.Phase != PurchaseEvaluationPhase.TraLai)
+            throw new ConflictException("Chỉ sửa được phiếu khi ở phase Nháp hoặc Trả lại.");
+
+        // Validate ApprovalWorkflowId V2 nếu thay đổi (Mig 23).
+        if (request.ApprovalWorkflowId is Guid awId && awId != entity.ApprovalWorkflowId)
+        {
+            var aw = await db.ApprovalWorkflows.AsNoTracking()
+                .FirstOrDefaultAsync(w => w.Id == awId, ct)
+                ?? throw new NotFoundException("ApprovalWorkflow", awId);
+            var expectedType = entity.Type switch
+            {
+                PurchaseEvaluationType.DuyetNcc => Domain.ApprovalWorkflowsV2.ApprovalWorkflowApplicableType.DuyetNcc,
+                PurchaseEvaluationType.DuyetNccPhuongAn => Domain.ApprovalWorkflowsV2.ApprovalWorkflowApplicableType.DuyetNccPhuongAn,
+                _ => throw new ConflictException($"PurchaseEvaluationType {entity.Type} chưa map sang ApprovalWorkflowApplicableType."),
+            };
+            if (aw.ApplicableType != expectedType)
+                throw new ConflictException($"Quy trình {aw.Code} áp dụng cho {aw.ApplicableType}, không khớp với loại phiếu {entity.Type}.");
+        }
 
         // Validate Budget link nếu thay đổi.
         if (request.BudgetId is Guid bid && bid != entity.BudgetId)
@@ -153,6 +190,7 @@ public class UpdatePurchaseEvaluationDraftCommandHandler(
         entity.BudgetId = request.BudgetId;
         entity.BudgetManualName = request.BudgetManualName;
         entity.BudgetManualAmount = request.BudgetManualAmount;
+        entity.ApprovalWorkflowId = request.ApprovalWorkflowId;     // Mig 23 — User đổi quy trình
 
         db.PurchaseEvaluationChangelogs.Add(new PurchaseEvaluationChangelog
         {
@@ -409,6 +447,24 @@ public class GetPurchaseEvaluationQueryHandler(
             policy = PurchaseEvaluationPolicyRegistry.ForEvaluation(e);
         }
 
+        // Mig 23 — load ApprovalWorkflow V2 info nếu pin (Code/Name/Version
+        // hiển thị FE detail card "QT-DN-V2-001 - Tên (v01)").
+        string? awCode = null, awName = null;
+        int? awVersion = null;
+        if (e.ApprovalWorkflowId is Guid awId)
+        {
+            var aw = await db.ApprovalWorkflows.AsNoTracking()
+                .Where(w => w.Id == awId)
+                .Select(w => new { w.Code, w.Name, w.Version })
+                .FirstOrDefaultAsync(ct);
+            if (aw is not null)
+            {
+                awCode = aw.Code;
+                awName = aw.Name;
+                awVersion = aw.Version;
+            }
+        }
+
         return new PurchaseEvaluationDetailBundleDto(
             e.Id, e.MaPhieu, e.Type, e.Phase, e.TenGoiThau, e.DiaDiem, e.MoTa,
             e.ProjectId, project?.Name ?? "",
@@ -419,6 +475,7 @@ public class GetPurchaseEvaluationQueryHandler(
             e.PaymentTerms, e.SlaDeadline, e.CreatedAt, e.UpdatedAt,
             e.BudgetId, budgetSummary,
             e.BudgetManualName, e.BudgetManualAmount,
+            e.ApprovalWorkflowId, awCode, awName, awVersion,
             e.Suppliers
                 .OrderBy(s => s.Order)
                 .Select(s => new PurchaseEvaluationSupplierDto(