[CLAUDE] PurchaseEvaluation: Mig 55 ô "Ghi chú từ CCM" ngân sách gói thầu — CCM nhập số + ghi lý do giống PRO

- Entity PeWorkItemBudget +CcmNote (mirror ProNote, nvarchar 1000) + Mig 55 additive-nullable
- UpdatePeBudgetCcmCommand +CcmNote absolute-set, role-gate CostControl/Admin fail-closed
- DTO PeBudgetSummaryDto +CcmNote + controller BudgetCcmBody + GET mapping
- FE 2 app SHA-mirror: dòng "Ghi chú từ CCM" gate canEditCcm (sau V0/hiệu chỉnh), absolute-set đủ 3 field
- Test +5 (set CCM/Admin, null-clear, non-priv Forbidden, all-3-persist) -> 339 pass

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Backend/SolutionErp.Application/PurchaseEvaluations/Dtos/PurchaseEvaluationDtos.cs

@@ -297,6 +297,7 @@ public record PeBudgetSummaryDto(
     string? ProNote,
     decimal? InitialAmount,
     decimal? AdjustmentAmount,
+    string? CcmNote,
     decimal FullAmount,
     bool FullIsEstimate,
     bool CanEditPro,

src/Backend/SolutionErp.Application/PurchaseEvaluations/PeWorkItemBudgetFeatures.cs

@@ -12,7 +12,7 @@ namespace SolutionErp.Application.PurchaseEvaluations;
 // [S61 Mig 50] 2 handler nhập ngân sách gói thầu theo ROLE (anh Kiệt chốt):
 //   - PRO (Procurement | Admin): ProEstimateAmount (dự trù lần đầu) + ProNote.
 //   - CCM (CostControl | Admin): InitialAmount ("Ban hành lần đầu") +
-//     AdjustmentAmount ("V0/hiệu chỉnh tăng giảm" — cho phép ÂM).
+//     AdjustmentAmount ("V0/hiệu chỉnh tăng giảm" — cho phép ÂM) + CcmNote (Mig 55).
 // Authz pattern AssignItTicketHandler S54: controller [Authorize] any-auth,
 // handler fine-grained ForbiddenException fail-closed (Forbidden TRƯỚC mọi
 // side-effect — S56 #5). KHÔNG ràng Phase (CCM "nhập trong khi duyệt" theo lời
@@ -126,7 +126,8 @@ public class UpdatePeBudgetProCommandHandler(
 public record UpdatePeBudgetCcmCommand(
     Guid PeId,
     decimal? InitialAmount,
-    decimal? AdjustmentAmount) : IRequest;
+    decimal? AdjustmentAmount,
+    string? CcmNote) : IRequest;
 
 public class UpdatePeBudgetCcmCommandValidator : AbstractValidator<UpdatePeBudgetCcmCommand>
 {
@@ -135,6 +136,7 @@ public class UpdatePeBudgetCcmCommandValidator : AbstractValidator<UpdatePeBudge
         RuleFor(x => x.InitialAmount).GreaterThanOrEqualTo(0)
             .When(x => x.InitialAmount.HasValue);
         // AdjustmentAmount KHÔNG ràng dấu — "hiệu chỉnh tăng giảm" cho phép ÂM.
+        RuleFor(x => x.CcmNote).MaximumLength(1000);
     }
 }
 
@@ -161,14 +163,18 @@ public class UpdatePeBudgetCcmCommandHandler(
 
         var oldInitial = rec.InitialAmount;
         var oldAdjustment = rec.AdjustmentAmount;
+        var oldCcmNote = rec.CcmNote;
         rec.InitialAmount = request.InitialAmount;           // absolute-set (null = clear)
         rec.AdjustmentAmount = request.AdjustmentAmount;
+        rec.CcmNote = request.CcmNote;
 
         var parts = new List<string>();
         if (oldInitial != request.InitialAmount)
             parts.Add($"ban hành lần đầu {oldInitial?.ToString("N0") ?? "(trống)"}đ → {request.InitialAmount?.ToString("N0") ?? "(trống)"}đ");
         if (oldAdjustment != request.AdjustmentAmount)
             parts.Add($"V0/hiệu chỉnh {oldAdjustment?.ToString("N0") ?? "(trống)"}đ → {request.AdjustmentAmount?.ToString("N0") ?? "(trống)"}đ");
+        if (oldCcmNote != request.CcmNote)
+            parts.Add("ghi chú CCM cập nhật");
 
         db.PurchaseEvaluationChangelogs.Add(new PurchaseEvaluationChangelog
         {

src/Backend/SolutionErp.Application/PurchaseEvaluations/PurchaseEvaluationFeatures.cs

@@ -851,7 +851,7 @@ public class GetPurchaseEvaluationQueryHandler(
 
             peBudgetSummary = new PeBudgetSummaryDto(
                 pairRec?.Id, pairRec?.ProEstimateAmount, pairRec?.ProNote,
-                pairRec?.InitialAmount, pairRec?.AdjustmentAmount,
+                pairRec?.InitialAmount, pairRec?.AdjustmentAmount, pairRec?.CcmNote,
                 fullAmount, !hasCcm,
                 canEditPro, canEditCcm,
                 prevSubmittedTotal, prevSubmittedCount,