[CLAUDE] PurchaseEvaluation: ngan sach goi thau theo Excel anh Kiet - bang tong hop 2 block + nhap theo role PRO/CCM + xoa module Budget cu (Mig 50)

- Mig 50 ReplaceBudgetModuleWithPeWorkItemBudgets: bang moi PeWorkItemBudgets (1 record/cap Du an x Hang muc, UNIQUE filtered [IsDeleted]=0) + drop 5 bang Budget cu + PE/Contracts drop BudgetId + backfill BudgetManualAmount->BudgetPeriodAmount TRUOC DropColumn (phieu UAT giu so) + DELETE menu/permission Bg_* IN-list children-first
- BE: PUT {id}/budget/pro (role Procurement) + {id}/budget/ccm (role CostControl, Adjustment cho phep AM) fail-closed Forbidden-truoc-side-effect + EnsureTrackedAsync race-safe (catch unique -> re-fetch winner, loi khac rethrow) + auto-create record khi tao phieu + budgetSummary DTO (luy ke trinh-truoc/chon-thau-truoc/de-xuat-ky-nay + full fallback du-tru-PRO + canEdit flags) + submit-guard (3) doi predicate BudgetPeriodAmount -> "chua nhap Ngan sach ky nay" + PATCH budget-adjust absolute-set 2 field moi + Contract GIU BudgetManual* (HD nhap tay khong doi) + ke thua HD map BudgetPeriodAmount
- FE x2 app SHA256 identical: bang "TONG HOP NGAN SACH TRINH KY" block A (full dam + ban hanh + V0 hieu chinh + du tru PRO + ghi chu, editable theo canEditPro/canEditCcm) + block B 9 dong cong thuc Excel (5=1+3, 6=2+4, 7=full-5, 8 tu nhap default 7, 9=4+8) + to mau vuot ngan sach #C00000 / am do / red-soft row8>row7 + "Chua chon" khi count=0 + banner phieu chua gan Hang muc + o "Ngan sach ky nay" o create/header + XOA pages/components/types budgets + routes + menuKeys + Layout staticMap 4-place
- Tests: +22 PeWorkItemBudgetTests (auto-create x3, ensure/race x2, authz matrix PRO x5 + CCM x3, budgetSummary aggregates x5, adjust x4) - 14 BudgetPolicyTests xoa theo module - 1 test via-BudgetId -> 263 PASS (45 Domain + 218 Infra, 0 fail)
- database-agent advise adopted: khong FK vat ly PE/Contracts->Budgets (DropColumn khong can DropForeignKey) + DropIndex truoc DropColumn (SQL 5074) + IN-list thay LIKE Bg_% (underscore wildcard + miss root) + khong Serializable wrap (nested-tx conflict codegen)
- Reviewer PASS-with-minor 0 blocker (verdict-first survived); 2 minor da sua truoc commit (comment adjustMut absolute-set + dead key budgetId); note: F4 approver-edit-budget UI entry tam drafter-only, BE van cho approver scope - cho UAT anh Kiet
- Scaffold-bug caught: EF tu sinh RenameColumn BudgetManualAmount->ExpectedRemainingAmount (SAI semantics) -> thay bang Add+UPDATE+Drop

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

src/Backend/SolutionErp.Domain/Contracts/Contract.cs

@@ -24,10 +24,10 @@ public class Contract : AuditableEntity
     public DateTime? SlaDeadline { get; set; }                     // Hết hạn phase hiện tại
     public string? DraftData { get; set; }                         // JSON field values (render template)
     public bool SlaWarningSent { get; set; }                       // Flag để không gửi warning 2 lần
-    public Guid? BudgetId { get; set; }                            // Reference Budget (Phase 7) — đối chiếu chi phí HĐ vs ngân sách
 
-    // Manual budget fields (Phase 9 — Migration 17 mirror PE): user nhập tay khi
-    // KHÔNG link Budget entity. Cả 2 cùng null OK. KHÔNG XOR validate với BudgetId.
+    // Manual budget fields (Phase 9 — Migration 17): user nhập tay tham chiếu
+    // ngân sách. [S61 Mig 50] BudgetId (FK module Budget cũ) đã DROP cùng module —
+    // 2 field manual GIỮ NGUYÊN (HĐ không đổi theo spec anh Kiệt S61).
     public string? BudgetManualName { get; set; }                  // Tên tham chiếu
     public decimal? BudgetManualAmount { get; set; }               // Tổng số tiền nhập tay (đ)