[CLAUDE] PE: Workflow designer admin UI + Ý kiến 4 phòng ban (P1 Session 5)

==== Task 1: PE Workflow Designer admin ====

BE (mirror Contract WorkflowAdminFeatures pattern):
- Application/PurchaseEvaluations/PeWorkflowAdminFeatures.cs ~250 LOC:
  - GetPeWorkflowAdminOverviewQuery → list 2 EvaluationType (DuyetNcc / DuyetNccPhuongAn) với Active + History versions + count phiếu đang dùng
  - CreatePeWorkflowDefinitionCommand + Validator: auto-increment Version per Code, deactivate Active cũ trong cùng EvaluationType (1 active per type invariant)
  - DTOs: PeWorkflowStepApproverDto / PeWorkflowStepDto / PeWorkflowDefinitionDto / PeWorkflowTypeSummaryDto / PeWorkflowAdminOverviewDto
  - Phase validation 1..7 (state thường, không bao gồm 99=TuChoi)
- Api/Controllers/PeWorkflowsController.cs: 2 endpoint GET /api/pe-workflows + POST. Reuse policy "Workflows.Read" + "Workflows.Create" (admin chung quyền cho cả 2 nhóm WF).

FE:
- pages/system/PeWorkflowsPage.tsx ~500 LOC mirror WorkflowsPage:
  - Landing 2-card grid khi /system/pe-workflows (chưa pick type)
  - TypePanel khi /system/pe-workflows/:typeCode (DuyetNcc / DuyetNccPhuongAn)
  - DefinitionCard read-only view với active badge + version + steps + approvers (Role/User chip)
  - PeWorkflowDesigner dialog: clone từ existing, edit Code/Name/Description, add/remove steps, +Role / +User approvers per step, save → version mới + deactivate cũ
- App.tsx route /system/pe-workflows + /system/pe-workflows/:typeCode
- Layout đã có resolver PeWf_<Code> → /system/pe-workflows/<code> từ session 3

==== Task 2: Ý kiến 4 phòng ban PE ====

Domain:
- PurchaseEvaluationDepartmentOpinion entity (AuditableEntity) — PEId + Kind + Opinion text + SignedAt + UserId + UserName denorm
- PeDepartmentKind enum (PheDuyet / Ccm / MuaHang / SmPm)
- PE entity + collection navigation DepartmentOpinions

Infrastructure:
- PurchaseEvaluationDepartmentOpinionConfiguration EF: UNIQUE(PEId, Kind) — max 1 row per phòng ban per phiếu (UPDATE in-place)
- ApplicationDbContext + IApplicationDbContext DbSet
- Migration 15 AddPurchaseEvaluationDepartmentOpinions (15 migration total / 52 DB tables)

Application:
- PeDepartmentOpinionFeatures.cs: UpsertPeDepartmentOpinionCommand (sign=true → set SignedAt+UserId, sign=false chỉ lưu text giữ chữ ký cũ) + DeletePeDepartmentOpinionCommand
- DTO bundle update: + DepartmentOpinions list trong PurchaseEvaluationDetailBundleDto
- GetPurchaseEvaluationQueryHandler load DepartmentOpinions + KindLabel resolution

API:
- POST /api/purchase-evaluations/{id}/opinions (upsert)
- DELETE /api/purchase-evaluations/{id}/opinions/{kind}

FE:
- types/purchaseEvaluation.ts: + PeDepartmentKind enum + PeDepartmentKindLabel + PeDepartmentOpinion type + departmentOpinions vào bundle
- PeDetailTabs Section "5. Ý kiến 4 phòng ban (sign-off)" — 2x2 grid OpinionBox per kind:
  - Read mode (readOnly menu Duyệt): hiển thị text + chữ ký
  - Edit mode: textarea + 2 button "Lưu text" / "Lưu & Ký"
  - Badge "Đã ký" emerald + tên người ký + ngày khi signedAt != null

==== Task 3: User seed verify ====

Seed `SeedDemoUsersAsync` đã match đúng user list authoritative (5 PRO TPB+NV / 7 CCM TPB+NV / 1 ISO / 1 CEO) từ prior commit. DbInitializer reconcile sẽ tự sync khi API restart. Typo trong list user (soluttions / trương) đã fixed sensibly trong seed.

==== Build verify ====
- dotnet build clean (0 error)
- fe-admin TS build pass (1 module mới PeWorkflowsPage)
- fe-user TS build pass (PE detail mirror)

Total: 8 file mới (BE 4 + FE 1 + Migration 2 + 1 Domain) + 13 file modified.

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

src/Backend/SolutionErp.Domain/PurchaseEvaluations/PurchaseEvaluation.cs

@@ -34,4 +34,5 @@ public class PurchaseEvaluation : AuditableEntity
     public List<PurchaseEvaluationApproval> Approvals { get; set; } = new();
     public List<PurchaseEvaluationChangelog> Changelogs { get; set; } = new();
     public List<PurchaseEvaluationAttachment> Attachments { get; set; } = new();
+    public List<PurchaseEvaluationDepartmentOpinion> DepartmentOpinions { get; set; } = new();
 }

src/Backend/SolutionErp.Domain/PurchaseEvaluations/PurchaseEvaluationDepartmentOpinion.cs

@@ -0,0 +1,35 @@
+using SolutionErp.Domain.Common;
+
+namespace SolutionErp.Domain.PurchaseEvaluations;
+
+// "Ý kiến 4 phòng ban" — sign-off block trên PHIẾU TRÌNH KÝ CHỌN TP/NCC.
+// 4 box: Phê duyệt / P.CCM / P.MuaHàng / SM-PM. Mỗi box có:
+// - Opinion text (text ý kiến)
+// - SignedAt date
+// - UserId người ký (lưu UserName denorm để render readable)
+//
+// Lưu thành table riêng (1:N với PurchaseEvaluation, max 4 row mỗi PE) để:
+// - Dễ query "phòng nào chưa ký"
+// - Audit history (mỗi update là 1 record? — không, dùng UPDATE in-place,
+//   audit qua PurchaseEvaluationChangelog).
+// - Không bloat header với 12 column nullable.
+public enum PeDepartmentKind
+{
+    PheDuyet = 1,    // box "PHÊ DUYỆT" trên cùng — typically Drafter/PM ký xác nhận trình
+    Ccm = 2,         // P.CCM — Cost Control review
+    MuaHang = 3,     // P.MuaHàng (PRO) — Procurement
+    SmPm = 4,        // SM-PM — Site Manager / Project Manager
+}
+
+public class PurchaseEvaluationDepartmentOpinion : AuditableEntity
+{
+    public Guid PurchaseEvaluationId { get; set; }
+    public PeDepartmentKind Kind { get; set; }
+
+    public string? Opinion { get; set; }       // text ý kiến (max 2000)
+    public DateTime? SignedAt { get; set; }
+    public Guid? UserId { get; set; }           // người ký
+    public string? UserName { get; set; }       // denorm cho readable render
+
+    public PurchaseEvaluation? PurchaseEvaluation { get; set; }
+}