[CLAUDE] PurchaseEvaluation: go han hanh dong "Tu choi" - chi con Duyet hoac Tra lai (UAT anh Kiet S60 14:14)

- Domain policy: xoa MOI transition -> TuChoi o ca 4 policy (NccOnly + NccWithPlan + ForV2Schema + FromDefinition) -> NextPhases het tra TuChoi, nut FE tu bien mat
- Service guard S60: chan targetPhase=TuChoi moi caller ke ca Admin (dung truoc moi branch — spec bo han, khong escape hatch); message huong dan dung Tra lai / Xoa nhap
- FE x2 app: filter phong thu next.filter(p != TuChoi) PeWorkflowPanel (SHA256 identical); dialog/isCancel giu dead-safe de flip lai de
- Enum TuChoi + phieu TuChoi cu + tab filter "Tu choi" GIU display (data cu render binh thuong)
- SlaExpiryJob chi dung Contract — PE khong auto-TuChoi, khong anh huong
- Tests spec-change cung commit: Domain flip BothPolicies_TuChoi_RemovedFromAllTransitions_S60 + NEW V2SchemaPolicy fact; Infra NEW TargetTuChoi_WithRejectDecision_Throws_TuChoiRemoved_S60 (guard #45 test cu giu nguyen PASS — van dung truoc)
- Test 254 -> 256 PASS (59 Domain + 197 Infra)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

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

@@ -58,22 +58,18 @@ public static class PurchaseEvaluationPolicies
         {
             // Drafter trình từ Nháp HOẶC gửi lại từ Trả lại — cùng entry point.
             [(PurchaseEvaluationPhase.DangSoanThao, PurchaseEvaluationPhase.ChoPurchasing)] = [AppRoles.Drafter, AppRoles.DeptManager],
-            [(PurchaseEvaluationPhase.DangSoanThao, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Drafter, AppRoles.DeptManager],
             [(PurchaseEvaluationPhase.TraLai, PurchaseEvaluationPhase.ChoPurchasing)] = [AppRoles.Drafter, AppRoles.DeptManager],
-            [(PurchaseEvaluationPhase.TraLai, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Drafter, AppRoles.DeptManager],
 
-            // Phase trung gian: 3 hành động — Duyệt forward / Trả lại (TraLai Phase riêng) / Từ chối (TuChoi terminal).
+            // Phase trung gian: 2 hành động — Duyệt forward / Trả lại (TraLai Phase riêng).
+            // UAT S60: TuChoi gỡ khỏi quy trình ("Duyệt hoặc Trả về thôi").
             [(PurchaseEvaluationPhase.ChoPurchasing, PurchaseEvaluationPhase.ChoCCM)] = [AppRoles.Procurement],
             [(PurchaseEvaluationPhase.ChoPurchasing, PurchaseEvaluationPhase.TraLai)] = [AppRoles.Procurement],
-            [(PurchaseEvaluationPhase.ChoPurchasing, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Procurement],
 
             [(PurchaseEvaluationPhase.ChoCCM, PurchaseEvaluationPhase.ChoCEODuyetNCC)] = [AppRoles.CostControl],
             [(PurchaseEvaluationPhase.ChoCCM, PurchaseEvaluationPhase.TraLai)] = [AppRoles.CostControl],
-            [(PurchaseEvaluationPhase.ChoCCM, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.CostControl],
 
             [(PurchaseEvaluationPhase.ChoCEODuyetNCC, PurchaseEvaluationPhase.DaDuyet)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
             [(PurchaseEvaluationPhase.ChoCEODuyetNCC, PurchaseEvaluationPhase.TraLai)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
-            [(PurchaseEvaluationPhase.ChoCEODuyetNCC, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
         },
         PhaseSla: DefaultSla,
         ActivePhases:
@@ -94,30 +90,23 @@ public static class PurchaseEvaluationPolicies
         Transitions: new Dictionary<(PurchaseEvaluationPhase, PurchaseEvaluationPhase), string[]>
         {
             [(PurchaseEvaluationPhase.DangSoanThao, PurchaseEvaluationPhase.ChoPurchasing)] = [AppRoles.Drafter, AppRoles.DeptManager],
-            [(PurchaseEvaluationPhase.DangSoanThao, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Drafter, AppRoles.DeptManager],
             [(PurchaseEvaluationPhase.TraLai, PurchaseEvaluationPhase.ChoPurchasing)] = [AppRoles.Drafter, AppRoles.DeptManager],
-            [(PurchaseEvaluationPhase.TraLai, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Drafter, AppRoles.DeptManager],
 
-            // Phase trung gian: 3 hành động — Duyệt forward / Trả lại (TraLai) / Từ chối (TuChoi).
+            // Phase trung gian: 2 hành động — Duyệt forward / Trả lại (TraLai). UAT S60: TuChoi gỡ.
             [(PurchaseEvaluationPhase.ChoPurchasing, PurchaseEvaluationPhase.ChoDuAn)] = [AppRoles.Procurement],
             [(PurchaseEvaluationPhase.ChoPurchasing, PurchaseEvaluationPhase.TraLai)] = [AppRoles.Procurement],
-            [(PurchaseEvaluationPhase.ChoPurchasing, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Procurement],
 
             [(PurchaseEvaluationPhase.ChoDuAn, PurchaseEvaluationPhase.ChoCCM)] = [AppRoles.ProjectManager],
             [(PurchaseEvaluationPhase.ChoDuAn, PurchaseEvaluationPhase.TraLai)] = [AppRoles.ProjectManager],
-            [(PurchaseEvaluationPhase.ChoDuAn, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.ProjectManager],
 
             [(PurchaseEvaluationPhase.ChoCCM, PurchaseEvaluationPhase.ChoCEODuyetPA)] = [AppRoles.CostControl],
             [(PurchaseEvaluationPhase.ChoCCM, PurchaseEvaluationPhase.TraLai)] = [AppRoles.CostControl],
-            [(PurchaseEvaluationPhase.ChoCCM, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.CostControl],
 
             [(PurchaseEvaluationPhase.ChoCEODuyetPA, PurchaseEvaluationPhase.ChoCEODuyetNCC)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
             [(PurchaseEvaluationPhase.ChoCEODuyetPA, PurchaseEvaluationPhase.TraLai)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
-            [(PurchaseEvaluationPhase.ChoCEODuyetPA, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
 
             [(PurchaseEvaluationPhase.ChoCEODuyetNCC, PurchaseEvaluationPhase.DaDuyet)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
             [(PurchaseEvaluationPhase.ChoCEODuyetNCC, PurchaseEvaluationPhase.TraLai)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
-            [(PurchaseEvaluationPhase.ChoCEODuyetNCC, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Director, AppRoles.AuthorizedSigner],
         },
         PhaseSla: DefaultSla,
         ActivePhases:
@@ -160,24 +149,23 @@ public static class PurchaseEvaluationPolicyRegistry
     // Workflow chạy theo state machine 5 trạng thái + iterate Steps/Levels —
     // Phase enum chỉ dùng (DangSoanThao/TraLai/ChoDuyet/DaDuyet/TuChoi). Service
     // tự handle advance level/step bên trong ChoDuyet, FE chỉ cần biết:
-    //   DangSoanThao/TraLai → ChoDuyet (trình) | TuChoi (huỷ)
-    //   ChoDuyet            → ChoDuyet (advance) | TraLai (trả lại) | TuChoi (từ chối)
+    //   DangSoanThao/TraLai → ChoDuyet (trình)
+    //   ChoDuyet            → ChoDuyet (advance) | TraLai (trả lại)
+    // UAT S60 (anh Kiệt): TuChoi GỠ khỏi quy trình ("Duyệt hoặc Trả về thôi") —
+    // enum + display phiếu TuChoi cũ GIỮ, chỉ hết đường transition tới.
     public static PurchaseEvaluationPolicy ForV2Schema()
     {
         var transitions = new Dictionary<(PurchaseEvaluationPhase, PurchaseEvaluationPhase), string[]>
         {
             // Drafter trình từ Nháp HOẶC gửi lại từ Trả lại — cùng entry point
             [(PurchaseEvaluationPhase.DangSoanThao, PurchaseEvaluationPhase.ChoDuyet)] = [AppRoles.Drafter, AppRoles.DeptManager],
-            [(PurchaseEvaluationPhase.DangSoanThao, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Drafter, AppRoles.DeptManager],
             [(PurchaseEvaluationPhase.TraLai, PurchaseEvaluationPhase.ChoDuyet)] = [AppRoles.Drafter, AppRoles.DeptManager],
-            [(PurchaseEvaluationPhase.TraLai, PurchaseEvaluationPhase.TuChoi)] = [AppRoles.Drafter, AppRoles.DeptManager],
 
             // ChoDuyet — Service guard match approver ApproverUserId, Policy chỉ
             // expose 3 nút cho FE (Duyệt forward / Trả lại / Từ chối). Roles "*"
             // để guard không block; Service tự enforce ApproverUserId match.
             [(PurchaseEvaluationPhase.ChoDuyet, PurchaseEvaluationPhase.ChoDuyet)] = ["*"],
             [(PurchaseEvaluationPhase.ChoDuyet, PurchaseEvaluationPhase.TraLai)] = ["*"],
-            [(PurchaseEvaluationPhase.ChoDuyet, PurchaseEvaluationPhase.TuChoi)] = ["*"],
         };
         var sla = new Dictionary<PurchaseEvaluationPhase, TimeSpan?>
         {
@@ -245,29 +233,21 @@ public static class PurchaseEvaluationPolicyRegistry
                         userTransitions.TryAdd((PurchaseEvaluationPhase.TraLai, s.Phase), userIds);
                 }
 
-                // 3 hành động phase trung gian — Duyệt forward + Trả lại (TraLai) + Từ chối (TuChoi)
+                // 2 hành động phase trung gian — Duyệt forward + Trả lại (TraLai).
+                // UAT S60 (anh Kiệt 14:14): "bỏ luôn nút Từ chối — Duyệt hoặc Trả
+                // về thôi" → TuChoi GỠ khỏi mọi transition map (enum + phase
+                // display + data cũ GIỮ; service có guard mirror chặn API direct).
                 if (prev.Value != PurchaseEvaluationPhase.DangSoanThao && s.Phase != PurchaseEvaluationPhase.DangSoanThao)
                 {
                     transitions.TryAdd((s.Phase, PurchaseEvaluationPhase.TraLai), roles);
-                    transitions.TryAdd((s.Phase, PurchaseEvaluationPhase.TuChoi), roles);
                     if (userIds.Length > 0)
                     {
                         userTransitions.TryAdd((s.Phase, PurchaseEvaluationPhase.TraLai), userIds);
-                        userTransitions.TryAdd((s.Phase, PurchaseEvaluationPhase.TuChoi), userIds);
                     }
                 }
             }
             prev = s.Phase;
         }
-        // First step (DangSoanThao) — Drafter có thể TuChoi (huỷ phiếu).
-        // Tương tự cho TraLai — Drafter có thể TuChoi luôn từ Trả lại.
-        if (steps.Count > 0)
-        {
-            transitions.TryAdd((steps[0].Phase, PurchaseEvaluationPhase.TuChoi),
-                [AppRoles.Drafter, AppRoles.DeptManager]);
-            transitions.TryAdd((PurchaseEvaluationPhase.TraLai, PurchaseEvaluationPhase.TuChoi),
-                [AppRoles.Drafter, AppRoles.DeptManager]);
-        }
 
         // Terminal states always available + TraLai phase
         if (!activePhases.Contains(PurchaseEvaluationPhase.TuChoi))

src/Backend/SolutionErp.Infrastructure/Services/PurchaseEvaluationWorkflowService.cs

@@ -71,6 +71,20 @@ public class PurchaseEvaluationWorkflowService(
                 "(xem gotcha #45 + docs/workflow-contract.md).");
         }
 
+        // ===== UAT S60 (anh Kiệt 14:14) — GỠ hành động "Từ chối" =====
+        // "Bỏ luôn nút Từ chối — Duyệt hoặc Trả về thôi." Mọi policy đã bỏ
+        // TuChoi khỏi NextPhases (FE hết nút); guard này chặn caller direct
+        // (API forge / client cũ cache) — đứng TRƯỚC mọi branch nên chặn CẢ
+        // Admin manual override (spec = bỏ hẳn hành động, không escape hatch).
+        // Phase TuChoi + phiếu TuChoi cũ GIỮ display/filter. Flip lại nếu cần:
+        // xóa guard này + restore transitions trong PurchaseEvaluationPolicy.
+        if (targetPhase == PurchaseEvaluationPhase.TuChoi)
+        {
+            throw new ConflictException(
+                "Hành động \"Từ chối\" đã được gỡ khỏi quy trình duyệt — chỉ còn Duyệt hoặc Trả lại. " +
+                "Phiếu cần dừng: dùng Trả lại để người soạn sửa, hoặc Xóa phiếu khi còn Bản nháp.");
+        }
+
         // ===== REJECT BRANCH (extended Mig 28 — F1 multi-mode Trả lại) =====
         if (decision == ApprovalDecision.Reject)
         {