[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.Application/ApprovalWorkflowsV2/ApprovalWorkflowV2AdminFeatures.cs

@@ -45,6 +45,7 @@ public record AwDefinitionDto(
     string Name,
     string? Description,
     bool IsActive,
+    bool IsUserSelectable,
     DateTime? ActivatedAt,
     DateTime CreatedAt,
     List<AwStepDto> Steps);
@@ -126,6 +127,7 @@ public class GetAwAdminOverviewQueryHandler(
             d.Name,
             d.Description,
             d.IsActive,
+            d.IsUserSelectable,
             d.ActivatedAt,
             d.CreatedAt,
             d.Steps.OrderBy(s => s.Order).Select(s => new AwStepDto(
@@ -268,6 +270,7 @@ public class CreateAwDefinitionCommandHandler(IApplicationDbContext db)
             Name = request.Name,
             Description = request.Description,
             IsActive = true,
+            IsUserSelectable = true,    // Mig 25 — version mới mặc định cho user pick
             ActivatedAt = DateTime.UtcNow,
             Steps = request.Steps.OrderBy(s => s.Order)
                 .Select(s => new ApprovalWorkflowStep
@@ -291,6 +294,27 @@ public class CreateAwDefinitionCommandHandler(IApplicationDbContext db)
     }
 }
 
+// ========== PATCH user-selectable toggle (Mig 25 — admin pin/unpin cho user pick) ==========
+// Independent với IsActive: cho phép multiple version cùng selectable. Default
+// version mới IsUserSelectable=true (mirror IsActive default), admin có thể
+// unstick để dấu khỏi Workspace dropdown, hoặc stick lại version cũ archived.
+
+public record SetAwUserSelectableCommand(Guid Id, bool IsUserSelectable) : IRequest;
+
+public class SetAwUserSelectableCommandHandler(IApplicationDbContext db)
+    : IRequestHandler<SetAwUserSelectableCommand>
+{
+    public async Task Handle(SetAwUserSelectableCommand request, CancellationToken ct)
+    {
+        var def = await db.ApprovalWorkflows
+            .FirstOrDefaultAsync(d => d.Id == request.Id, ct)
+            ?? throw new KeyNotFoundException($"ApprovalWorkflow {request.Id} không tồn tại.");
+
+        def.IsUserSelectable = request.IsUserSelectable;
+        await db.SaveChangesAsync(ct);
+    }
+}
+
 // ========== DELETE version (chỉ khi chưa có phiếu pin) ==========
 // Hiện chưa có phiếu nào pin schema mới → unconditional delete OK cho UAT.
 // Sau UAT khi link với PE/Contract thật cần check usage trước khi delete.