[CLAUDE] Domain: Chunk A — Mig 31 swap F2 storage Users→ApprovalWorkflowLevels (Approver scope ChoDuyet)

Mig 31 RefactorSkipToFinalToApproverLevel — 2 stage manual reorder:
- ADD ApprovalWorkflowLevels.AllowApproverSkipToFinal bit NOT NULL DEFAULT 0
- DROP Users.AllowDrafterSkipToFinal (semantic mới khác hẳn — admin re-config qua Designer)
- NO BACKFILL (Option A — accept lose 4 prod user value per K0-bis audit)

Plan K refactor F2 semantic: Drafter from Nháp → Approver during ChoDuyet skip thẳng Cấp cuối.
Mirror F3+F4 admin opt-in per-Approver-slot pattern (Mig 29 + Mig 30) reinforced 3× cumulative.

Service line 121-157 F2 Drafter SUBMIT branch REMOVED stub (K2 sẽ add Approver F2 branch
trong APPROVE STEP line ~393-525). TransitionAsync skipToFinal param 8th KEPT cho K2 repurpose.

Application layer compile-break fix transient: UserDto field mapping + GET handler + LIST
handler + SetUserAllowDrafterSkipToFinalCommandHandler NoOp + PurchaseEvaluationFeatures
drafter flag → sentinel false. DTO + Command signature UNCHANGED (K2 chunk Chủ trì sẽ
refactor DTO/Command theo plan).

4 prod user (fin.pp + pm.nv + nv.test + truong.nguyen) lose AllowDrafterSkipToFinal=true
per bro Option A. Audit trail trong session log K8.

Verify:
- dotnet ef migrations add pass
- dotnet ef database update Dev + Design pass (Mig 31 applied both DB)
- dotnet build src/Backend/SolutionErp.Api production projects clean (0 err, 0 warn)
- dotnet test SKIPPED per UAT mode (memory feedback_uat_skip_verify) — K7 chunk fix
  remaining PurchaseEvaluationWorkflowServiceReturnModeTests.cs:253 reference

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

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

@@ -81,5 +81,10 @@ public class ApprovalWorkflowLevelConfiguration : IEntityTypeConfiguration<Appro
         // Mig 30 (S22+5) — F4 per-NV: cho phép edit Section "Điều chỉnh ngân sách"
         // lúc đang duyệt. Default false (admin opt-in).
         e.Property(x => x.AllowApproverEditBudget).HasDefaultValue(false);
+
+        // Mig 31 (S23 t1 Plan K Chunk A) — F2 per-NV REFACTOR: cho phép Approver
+        // slot này skip thẳng Cấp cuối lúc đang duyệt ChoDuyet. Default false
+        // (admin opt-in). Semantic + storage move từ Users.AllowDrafterSkipToFinal.
+        e.Property(x => x.AllowApproverSkipToFinal).HasDefaultValue(false);
     }
 }

src/Backend/SolutionErp.Infrastructure/Persistence/Migrations/20260514160124_RefactorSkipToFinalToApproverLevel.cs

@@ -0,0 +1,52 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SolutionErp.Infrastructure.Persistence.Migrations
+{
+    /// <inheritdoc />
+    // Mig 31 (S23 t1 Plan K Chunk A) — F2 storage swap Users → ApprovalWorkflowLevels.
+    // Manual reorder Up(): ADD col first → DROP col second (per memory rule
+    // feedback_ef_migration_backfill_reorder.md). NO BACKFILL block — Option A bro
+    // accept 4 prod user (fin.pp + pm.nv + nv.test + truong.nguyen) lose value cũ
+    // AllowDrafterSkipToFinal=true. Admin re-config qua Workflow Designer per slot.
+    //
+    // Down() reverse order với data loss accepted: cờ AllowApproverSkipToFinal sẽ
+    // mất khi rollback (Users.AllowDrafterSkipToFinal restore default false).
+    public partial class RefactorSkipToFinalToApproverLevel : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // Step 1 — ADD new column on ApprovalWorkflowLevels (per-slot Approver scope).
+            migrationBuilder.AddColumn<bool>(
+                name: "AllowApproverSkipToFinal",
+                table: "ApprovalWorkflowLevels",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+
+            // Step 2 — DROP old column on Users (NO BACKFILL — Option A accept lose).
+            migrationBuilder.DropColumn(
+                name: "AllowDrafterSkipToFinal",
+                table: "Users");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            // Step 1 — DROP new column on ApprovalWorkflowLevels.
+            migrationBuilder.DropColumn(
+                name: "AllowApproverSkipToFinal",
+                table: "ApprovalWorkflowLevels");
+
+            // Step 2 — ADD old column on Users (data loss accepted — default false).
+            migrationBuilder.AddColumn<bool>(
+                name: "AllowDrafterSkipToFinal",
+                table: "Users",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+        }
+    }
+}

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

@@ -198,6 +198,11 @@ namespace SolutionErp.Infrastructure.Persistence.Migrations
                         .HasColumnType("bit")
                         .HasDefaultValue(false);
 
+                    b.Property<bool>("AllowApproverSkipToFinal")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bit")
+                        .HasDefaultValue(false);
+
                     b.Property<bool>("AllowReturnOneLevel")
                         .ValueGeneratedOnAdd()
                         .HasColumnType("bit")
@@ -1945,9 +1950,6 @@ namespace SolutionErp.Infrastructure.Persistence.Migrations
                     b.Property<int>("AccessFailedCount")
                         .HasColumnType("int");
 
-                    b.Property<bool>("AllowDrafterSkipToFinal")
-                        .HasColumnType("bit");
-
                     b.Property<bool>("CanBypassReview")
                         .HasColumnType("bit");