[CLAUDE] Domain+App+Infra+Admin: W1 KHKK — Mig 69 ContractSigningPlans 7 bang + policy KeHoachKyKet + seeder UPGRADE-if-exists + CodeGen KHKK + Designer type-10

- Domain/ContractSigningPlans: 7 entity + 3 enum (Phase 1/2/3/98/99; DossierItem Kind/Status start=1); ApplicableType += ContractSigningPlan=10 (slot 10, append-only)
- Mig 69 AddContractSigningPlans: 7 CreateTable / 20 CreateIndex / 0 ALTER; UNIQUE filtered (PlanId,SupplierId) WHERE IsDeleted=0 (#57); FK 6 con Cascade 1-hop + 2 Restrict, 0 multiple-cascade-path; database-agent review PASS 8/8 + DB11
- MenuKeys.All += KeHoachKyKet (policy KeHoachKyKet.* x4 sinh runtime; menu-row prod KHONG doi — 142 giu); STATUS canonical 54->55 / 216->220
- DbInitializer.SeedKeHoachKyKetAccessAsync: UPGRADE-if-exists (F-S1 — khong insert-NO-OP) + vế CanDelete (Drafter/Admin), 13/13 role CanCreate+CanUpdate, chay SAU revoke; revoker khong phu Khkk_* (reviewer Truc-1 PASS)
- ContractSigningPlanCodeGenerator: KHKK/{YYYY}/{Seq:D3} (owner OK @S161) qua WorkflowAppCodeSequences dung chung, SERIALIZABLE
- AWV2AdminFeatures: 3 site count/retained/orphan + nhanh ContractSigningPlanLevelOpinions (chong no FK 500 khi xoa Level); +label VN type-10 (F-7); +ep false 2 co early-finalize server-side cho type-10 (F-8 — containment tang BE, FE da ep o levelFlagsPayload)
- fe-admin Designer: deep-link type-10 + an 2 checkbox early-finalize (anh phan "PHA VO" S155) — containment 2 lop render+payload
- tests: +4 (566 total, 0 fail) — schema-invariant 7 bang + codegen format (fault-inject 2 chieu chung co rang)

Reviewer: PASS_WITH_FLAGS 10 issue -> 8 fixed cung commit, 2 giu trang thai (F-1 acceptance đo-CO cho prod; F-4 ke thua y PE prod)

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

src/Backend/SolutionErp.Application/Common/Interfaces/IApplicationDbContext.cs

@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using SolutionErp.Domain.ApprovalWorkflowsV2;
+using SolutionErp.Domain.ContractSigningPlans;
 using SolutionErp.Domain.Contracts;
 using SolutionErp.Domain.Contracts.Details;
 using SolutionErp.Domain.Forms;
@@ -141,5 +142,17 @@ public interface IApplicationDbContext
     // Phase 11 P11-B Wave 1 (Mig 42) — Số dư phép theo năm (NV × LoạiPhép × Năm).
     DbSet<LeaveBalance> LeaveBalances { get; }
 
+    // [W1 Mig 69 — S161] GĐ2 "Kế hoạch ký kết HĐ" (ContractSigningPlan) — 7 bảng.
+    // Workflow V2 ApplicableType = ContractSigningPlan = 10 (`ApprovalWorkflow.cs:66`).
+    // Mã phiếu "KHKK/{YYYY}/{Seq:D3}" atomic qua `WorkflowAppCodeSequences` DÙNG CHUNG (:136),
+    // KHÔNG bảng sequence riêng.
+    DbSet<ContractSigningPlan> ContractSigningPlans { get; }
+    DbSet<ContractSigningPlanLine> ContractSigningPlanLines { get; }
+    DbSet<ContractSigningPlanDossierItem> ContractSigningPlanDossierItems { get; }
+    DbSet<ContractSigningPlanLevelOpinion> ContractSigningPlanLevelOpinions { get; }
+    DbSet<ContractSigningPlanAttachment> ContractSigningPlanAttachments { get; }
+    DbSet<ContractSigningPlanChangelog> ContractSigningPlanChangelogs { get; }
+    DbSet<ContractSigningPlanApproval> ContractSigningPlanApprovals { get; }
+
     Task<int> SaveChangesAsync(CancellationToken cancellationToken = default);
 }