[CLAUDE] Docs+Skill: chốt Session 14 wrap-up — PE 3-button workflow + Task 2 defer

Session 14 (2026-05-07) docs/skill update:

STATUS.md:
- Last updated + Phase summary count (95→96 test, 20 mig, 57 bảng, 41 gotcha)
- Recently Done row Session 14 chi tiết (3-button + Task 2 in-progress + DesignTime/Runtime DB gotcha)

HANDOFF.md:
- TL;DR Session 14 prepend với 1 commit + Task 2 defer
- 5 cảnh báo Session 15+: TraLai phase orphan / Task 2 sample seed / DesignTime
  vs Runtime DB / Budget N-stage defer / schema-diagram §17-19 defer

migration-todos.md: Phase 9 + Session 14 block 4 sub-task done + 2 defer task

Session log NEW `2026-05-07-2500-3-button-workflow.md`:
- Bối cảnh + spec 3-button (Duyệt/Trả lại/Từ chối) + implementation chi tiết
  (Domain policy expand + Service tách reject + FE button + dialog warning)
- Tests update (95→96 với +1 NEW Reject_To_TuChoi_Locks_Permanently)
- Task 2 in-progress: DesignTime vs Runtime DB gotcha + API exit 255 sớm
- Plan organization sau S14

Skill ef-core-migration:
- description + heading: 17→20 migration
- Bảng migration history thêm Mig 18-19 (PE) + Mig 20 (Contract)
- Section MỚI "N-stage workflow pattern (Mig 18-20)" — architecture decision
  với filtered unique trick + per-module migration packaging guideline
- Phase 8 update: 83→96 test breakdown

Skill contract-workflow:
- Section MỚI "Phase 9+ done (Mig 18-20 — Session 12/13/14)":
  * N-stage workflow PE + Contract (entity + filtered unique split + service
    refactor + tests + FE Designer + UsersPage cấp + API)
  * PE 3-button approval (Duyệt/Trả lại/Từ chối) Session 14
  * Defer: Budget N-stage / Phase TraLai=98 orphan

CLAUDE.md root: 16→20 migration + 55→57 bảng + 83→96 test
docs/rules.md §7: Phase 9 active 83→96 test

Verify: dotnet test 96 pass + npm build (skip — pure docs/skill update).

🎉 Session 14 wrap-up complete. Pushed 1 task (3-button) + Task 2 defer.
Cumulative since session start (13h17): 13 commit (1 button removal +
6 PE N-stage Chunk A-F + 5 Contract N-stage Chunk A,B,C,D,F + 1 3-button).

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

CLAUDE.md

@@ -50,7 +50,7 @@ Kiến trúc: **.NET 10 Clean Architecture + 2 React FE (admin + user) + SQL Ser
 - Audit fields: `CreatedAt`, `UpdatedAt`, `CreatedBy`, `UpdatedBy` (`BaseEntity`)
 - Soft delete: `IsDeleted`, `DeletedAt`, `DeletedBy` (`AuditableEntity`)
 - Migrations: `dotnet ef migrations add <Name> --project src/Backend/SolutionErp.Infrastructure --startup-project src/Backend/SolutionErp.Api`
-- **Hiện có 16 migration → 55 bảng** (Phase 9 — Migration 16 `AddTwoStageDeptApprovalAndSmartReject` — 3 bảng `*DepartmentApprovals` + `Users.CanBypassReview` + 3 `RejectedFromPhase` cho smart reject + 2-stage NV/TPB approval per dept)
+- **Hiện có 20 migration → 57 bảng** (Phase 9+ — Mig 18 `AddPeWorkflowInnerStepsAndPositionLevel` + Mig 19 `AlterPeDeptApprovalsUniqueFilteredForInnerSteps` + Mig 20 `AddContractWorkflowInnerStepsAndAlterDeptApprovalUnique`. N-stage workflow approval Phòng × PositionLevel cấu hình động per WorkflowStep cha. Mỗi inner step = 1 cấp duyệt sequential. Backward compat 100% với 2-stage Mig 16 qua filtered unique. PE 3-button Duyệt/Trả lại/Từ chối)
 
 ### Modules
 
@@ -84,7 +84,7 @@ tests/
     └── Application/                  (6 test - PeWorkflowDefinition versioning)
 ```
 
-**83 unit test pass** / ~3s. CI gate + path filter live.
+**96 unit test pass** / ~3s (54 Domain + 42 Infra: 17 codegen + 6 PE WF + 6 PE 2-stage + 6 PE N-stage S12 + 6 Contract N-stage S13 + 1 PE Reject Từ chối S14). CI gate + path filter live.
 
 ```bash
 dotnet test SolutionErp.slnx     # chạy cả 2 test project