[CLAUDE] AwV2: Mig 25 +IsUserSelectable + Designer pin toggle + Workspace filter, bỏ "(clone)"

Hai yêu cầu UAT 2026-05-08:
1. Bỏ "(clone)" auto-append khi clone version mới — version đã đủ phân biệt.
2. Thêm pin toggle để admin chọn workflows nào cho user pick lúc tạo phiếu.

Migration 25 AddIsUserSelectableToApprovalWorkflows:
- ALTER ApprovalWorkflows ADD IsUserSelectable bit NOT NULL DEFAULT 0
- UPDATE backfill SET IsUserSelectable=1 WHERE IsActive=1 (giữ behavior cũ
  cho active versions, archived = false default — admin tự pin nếu cần)

BE:
- Domain ApprovalWorkflow +property IsUserSelectable
- DTO AwDefinitionDto +field
- CreateAwDefinitionCommandHandler set default true cho version mới
- New SetAwUserSelectableCommand + Handler
- API PATCH /api/approval-workflows-v2/{id}/user-selectable (Workflows.Create policy)
- DbInitializer SeedSampleApprovalWorkflowsV2Async set IsUserSelectable=true

FE Designer (fe-admin):
- DefinitionDto +isUserSelectable
- Badge amber "Pin Cho user chọn" khi true (cạnh Đang áp dụng/Archived)
- Button "Pin/PinOff Ghim cho user / Bỏ ghim" trong action group + mutation toggle
- Auto-fill name khi clone: bỏ "(clone)" suffix → giữ nguyên name

FE Workspace (fe-admin + fe-user):
- approvalWorkflows query filter w.isUserSelectable === true
- User dropdown chỉ thấy workflows admin đã pin

Verify: dotnet build pass · 81 test pass · npm build × 2 pass · Mig 25 apply LocalDB OK.

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

src/Backend/SolutionErp.Infrastructure/Persistence/DbInitializer.cs

@@ -115,6 +115,7 @@ public static class DbInitializer
             Name = "Quy trình duyệt NCC và Giải pháp (mẫu UAT)",
             Description = "Sample seed cho UAT B — 1 Bước Phòng CCM × 1 Cấp NV test. Admin có thể clone tạo version mới qua Designer.",
             IsActive = true,
+            IsUserSelectable = true,    // Mig 25 — sample mặc định cho user pick
             ActivatedAt = DateTime.UtcNow,
         };
         var step = new ApprovalWorkflowStep

src/Backend/SolutionErp.Infrastructure/Persistence/Migrations/20260508120946_AddIsUserSelectableToApprovalWorkflows.cs

@@ -0,0 +1,34 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SolutionErp.Infrastructure.Persistence.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddIsUserSelectableToApprovalWorkflows : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "IsUserSelectable",
+                table: "ApprovalWorkflows",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+
+            // Backfill: workflow đang active = auto user-selectable (giữ behavior
+            // hiện tại — Workspace dropdown vẫn hiện active workflow). Archived
+            // versions default false, admin tự toggle khi muốn user pick.
+            migrationBuilder.Sql("UPDATE ApprovalWorkflows SET IsUserSelectable = 1 WHERE IsActive = 1;");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "IsUserSelectable",
+                table: "ApprovalWorkflows");
+        }
+    }
+}

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

@@ -155,6 +155,9 @@ namespace SolutionErp.Infrastructure.Persistence.Migrations
                     b.Property<bool>("IsActive")
                         .HasColumnType("bit");
 
+                    b.Property<bool>("IsUserSelectable")
+                        .HasColumnType("bit");
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(200)