[CLAUDE] Docs: chot session 3 — PE polish iter 2 + domain rebrand + 5 gotcha moi

User request: 'Chot lai toan bo MD de sang session moi'.

Session 3 (2026-04-24) — ~15 commit feat/fix PE module + domain migration:
 - Domain 3 subdomain huypham.vn → solutions.com.vn E2E live
 - PE rename 'Phuong An' → 'Giai phap' + backfill DB
 - Menu tree inheritance extend Pe_*/PeWf_*
 - Accordion mutex Pe_* + sidebar w-72 + label nowrap
 - NavLink queryMatches (fix 2 leaf cung highlight)
 - PE detail flat layout: Panel 2 = 4 section, Panel 3 + approvals/history
 - Upload file dinh kem per-NCC (SupplierAttachmentsCell) + Bang so sanh tong
 - readOnly mode menu 'Duyet' (pendingMe=1)
 - HD move Lich su dieu chinh → Panel 3
 - Demo email rebrand @solutionerp.local → @solutions.com.vn + BackfillUserEmailDomain

Docs updated (6 file):
 - STATUS.md: +9 row Recently Done session 3. In Progress tick 10+ done. Phase
   hien tai = 'UX polish hoan thien, UAT-ready'.
 - HANDOFF.md: TL;DR session 3 summary. Priority 0 = 3 task MISSING cuoi
   (Designer UI, Y kien 4 phong ban, Export PDF). Login email moi.
 - gotchas.md: +5 entry (#34 NavLink query, #35 menu inheritance extend,
   #36 Vite env rebuild, #37 PS 5.1 ASCII, #38 Identity rename 4 field) +
   checklist debug +5 entry.
 - ef-core-migration SKILL: migration 13 AddPurchaseEvaluationCodeSequences
   + Phase 6 update section (ComparisonTable enum + BackfillUserEmail).
 - skills/README: ef-core-migration 13 migration label updated.
 - docs/changelog/sessions/2026-04-24-chot-session-3-pe-polish.md: session log
   15 commit + bugs + stats + next priorities session 4.

Memory project_solution_erp.md: Phase 6 iter 2 DONE. Domain rebrand DONE.
Session 4 priority 3 PE gap remaining.

Stats: 47 DB tables (+1 MaPhieu seq), ~113 endpoint (+3 PE attachments),
13 migrations, 38 gotchas, ~85 commits total.

.claude/skills/README.md

@@ -17,7 +17,7 @@ Skill này là tài liệu chuyên biệt để Claude (và developer khác) dù
 | Skill | Mục đích | Trigger ví dụ | Trạng thái |
 |---|---|---|---|
 | `dependency-audit-erp` | Scan CVE NuGet + npm 2 FE, respect pin constraint (MediatR 12.4.1, Swashbuckle 6.9.0) | "npm audit", "dotnet vulnerable", "deps scan", "nâng cấp package" | ✅ New Tier 3 |
-| `ef-core-migration` | Tạo/revert EF Core 10 migration, 3-file rule, DesignTimeDbContextFactory, **12 migration history** (+ Phase 7 pending) | "thêm migration", "EF migration", "schema update", "snapshot lỗi" | ✅ Updated Phase 6 |
+| `ef-core-migration` | Tạo/revert EF Core 10 migration, 3-file rule, DesignTimeDbContextFactory, **13 migration history** (+ Phase 7 pending) | "thêm migration", "EF migration", "schema update", "snapshot lỗi" | ✅ Updated Phase 6 iter 2 |
 | `iis-deploy-runbook` | 3 IIS site + win-acme cert + gitea-runner + LibreOffice + debug 500/502/SignalR prod + **G-084 IPv4/IPv6 hardening** | "prod 500", "IIS fail", "cert hết hạn", "restart app pool", "deploy IIS", "port hijack" | ✅ Updated (G-084) |
 
 ## Format chuẩn 1 skill

.claude/skills/ef-core-migration/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: ef-core-migration
-description: Tạo/sửa/revert EF Core 10 migration cho SOLUTION_ERP. Dùng khi thêm entity mới, thay đổi schema, rollback migration, debug DesignTimeDbContextFactory fail. Đã có 12 migration sẵn (Init → AddPurchaseEvaluations). Snapshot + Designer + Migration 3-file rule bắt buộc commit đủ.
+description: Tạo/sửa/revert EF Core 10 migration cho SOLUTION_ERP. Dùng khi thêm entity mới, thay đổi schema, rollback migration, debug DesignTimeDbContextFactory fail. Đã có 13 migration sẵn (Init → AddPurchaseEvaluationCodeSequences). Snapshot + Designer + Migration 3-file rule bắt buộc commit đủ.
 when-to-use:
   - "thêm migration"
   - "EF Core migration"
@@ -32,13 +32,19 @@ when-to-use:
 | 10 | `AddMasterCatalogs` | UnitsOfMeasure, MaterialItems, ServiceItems, WorkItems |
 | 11 | `AddRoleShortNameAndUserDepartment` | +Role.ShortName + User.DepartmentId/Position (cột thêm, không bảng mới) |
 | **12** | **`AddPurchaseEvaluations`** | **10 bảng module Duyệt NCC: PurchaseEvaluations + Suppliers + Details + Quotes + Approvals + Changelogs + Attachments + WorkflowDefinitions/Steps/StepApprovers** |
+| **13** | **`AddPurchaseEvaluationCodeSequences`** | **1 bảng `PurchaseEvaluationCodeSequences` (Prefix PK, LastSeq) — atomic sequence cho MaPhieu format `PE/{YYYY}/{A\|B}/{Seq:D3}`** |
 
-Total: **46 bảng** dbo + `__EFMigrationsHistory`. Xem `docs/database/schema-diagram.md` ERD đầy đủ.
+Total: **47 bảng** dbo + `__EFMigrationsHistory`. Xem `docs/database/schema-diagram.md` ERD đầy đủ.
 
-**Phase 7 pending (session tiếp):**
+**Phase 7 pending (session sau):**
 - `AddPePaymentTermFields` — tách `PurchaseEvaluations.PaymentTerms` JSON thành 6 column riêng
 - `AddPeDepartmentOpinions` — thêm 4 field Ý kiến phòng ban (Phê duyệt/CCM/MuaHàng/SM-PM) vào header hoặc table riêng
-- `AddPurchaseEvaluationCodeSequences` — atomic MaPhieu sequence (nếu user chốt format mới)
+
+**Phase 6 update (2026-04-24):**
+- Enum `PurchaseEvaluationAttachmentPurpose.ComparisonTable = 4` mới (file bảng so sánh tổng).
+  Int column, không cần migration.
+- `BackfillUserEmailDomainAsync` trong DbInitializer — rename in-place 4 field
+  Email/NormalizedEmail/UserName/NormalizedUserName. Idempotent.
 
 ## Commands (chạy từ root repo)