[CLAUDE] Workflow: sua quy trinh duyet TAI CHO + co F6 AllowApproverDelete (dot 1)

Nen cho tinh nang "xoa phieu PE o man duyet" (UAT: phieu bam sai goi thau dang
an luy ke). Dot 1 lam NEN, dot 2 moi lam nut xoa.

Vi sao phai lam nen truoc: phieu dang chay pin ApprovalWorkflowId va doc workflow
SONG theo Id do. Moi POST tao workflow moi = Id MOI, nen tick co tren ban moi
KHONG BAO GIO toi duoc phieu dang treo. Phai co lenh sua-tai-cho giu nguyen Id.

- Domain: ApprovalWorkflowLevel + AllowApproverDelete (F6, per-NGUOI) + Mig
  20260727033522_AddPeAllowApproverDelete (AddColumn bit default false, no new table)
- Application: UpdateAwDefinitionCommand + Validator + Handler
  - 2 phep thu: (T1) khung khong doi - Order tung row bat bien
                (T2) luat choi khong doi - cam CeoApprovalThreshold, AllowApproverFinalize,
                     Code, ApplicableType => 409 bao tao ban moi
  - diff theo Level.Id (CAM delete-then-insert: no FK Restrict + mo coi LevelOpinion)
  - guard 2 tang chu ky: tang 1 chu ky tren ho so CON SONG; tang 2 chu ky CON LUU
    (cha xoa mem hoac opinion xoa mem) - ca hai deu CHAN, khong xoa cung
  - purge chi khi ho so cha KHONG CON ROW; boc transaction (ExecuteDelete tu commit)
  - KHONG tang Version, KHONG dung IsActive, KHONG doi Id
- Api: PUT /api/approval-workflows-v2/{id} + [Authorize(Policy="Workflows.Create")]
- Infra: message 403 in TEN NGUOI thay GUID tran
- FE: Designer tach "Sua tai cho" (PUT) vs "Tao phien ban moi" (POST) + o tick F6
- Tests: +21 (551 tong, 0 fail) - gom F12 chung minh phieu dang chay nhan thay doi ngay

Review: 14 FLAG, 3 HIGH da va (ExecuteDelete ngoai transaction / purge xoa cung
chu ky phieu xoa mem / endpoint khong co day FE goi toi).

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

src/Backend/SolutionErp.Infrastructure/Persistence/Configurations/ApprovalWorkflowConfiguration.cs

@@ -98,5 +98,11 @@ public class ApprovalWorkflowLevelConfiguration : IEntityTypeConfiguration<Appro
         // duyệt = KẾT THÚC quy trình (Phase=DaDuyet) miễn trình CEO. Default false
         // (admin opt-in). Khác F2 (skip = advance tới Cấp cuối): F5 = terminal ngay.
         e.Property(x => x.AllowApproverFinalize).HasDefaultValue(false);
+
+        // Mig 68 (S155 2026-07-27 — UAT Tra Sol) — F6 per-NV: cho phép NV slot này
+        // xóa MỀM phiếu đang treo ở ChoDuyet khi tới lượt mình duyệt (phiếu bấm sai
+        // gói thầu đang ăn lũy kế). Default false (admin opt-in per slot). Đọc
+        // per-ROW chứ KHÔNG per-Cấp — 1 Cấp có N người (OR-of-N).
+        e.Property(x => x.AllowApproverDelete).HasDefaultValue(false);
     }
 }

src/Backend/SolutionErp.Infrastructure/Persistence/Migrations/20260727033522_AddPeAllowApproverDelete.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SolutionErp.Infrastructure.Persistence.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddPeAllowApproverDelete : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "AllowApproverDelete",
+                table: "ApprovalWorkflowLevels",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "AllowApproverDelete",
+                table: "ApprovalWorkflowLevels");
+        }
+    }
+}

src/Backend/SolutionErp.Infrastructure/Persistence/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -192,6 +192,11 @@ namespace SolutionErp.Infrastructure.Persistence.Migrations
                         .ValueGeneratedOnAdd()
                         .HasColumnType("uniqueidentifier");
 
+                    b.Property<bool>("AllowApproverDelete")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bit")
+                        .HasDefaultValue(false);
+
                     b.Property<bool>("AllowApproverEditBudget")
                         .ValueGeneratedOnAdd()
                         .HasColumnType("bit")