[CLAUDE] Scaffold: khoi tao SOLUTION_ERP Phase 0

- .NET 10 Clean Architecture: Domain/Application/Infrastructure/Api (4 project)
- 2 React + Vite + TS app: fe-admin (:8082), fe-user (:8080) voi proxy /api
- Node engines >=20, .nvmrc = 20 cho CI (bai hoc NamGroup)
- SQL Server 2022 qua docker-compose (dev)
- Parse 8 FORM -> docs/forms-spec.md (catalog + ma HD format RG-001)
- Parse QUY_TRINH -> docs/workflow-contract.md (9 phase state machine + role matrix)
- docs: CLAUDE.md, STATUS.md, PROJECT-MAP.md, migration-todos.md (roadmap 5 phase)
- .claude/skills: 3 placeholder (contract-workflow, form-engine, permission-matrix)

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

README.md

@@ -0,0 +1,68 @@
+# SOLUTION_ERP
+
+Hệ thống quản lý Hợp đồng Nhà cung cấp / Thầu phụ / Tổ đội cho **Công ty TNHH Xây dựng Solutions**.
+
+> 📘 AI context: [`CLAUDE.md`](CLAUDE.md) (pointer) → [`docs/CLAUDE.md`](docs/CLAUDE.md) (full)
+
+## Quick start (dev)
+
+**Yêu cầu:** .NET 10 SDK, Node 20+, SQL Server (local hoặc qua Docker).
+
+```powershell
+# 1. DB — chạy SQL Server qua Docker (nếu chưa có local)
+docker compose up -d
+
+# 2. Backend — migration + run Api (port 5443)
+dotnet ef database update --project src/Backend/SolutionErp.Infrastructure --startup-project src/Backend/SolutionErp.Api
+dotnet run --project src/Backend/SolutionErp.Api
+
+# 3. Frontend admin (port 8082) — terminal mới
+cd fe-admin
+npm install
+npm run dev
+
+# 4. Frontend user (port 8080) — terminal mới
+cd fe-user
+npm install
+npm run dev
+```
+
+Admin mặc định (sẽ seed sau Phase 1): `admin@solutionerp.local` / `Admin@123456`
+
+## Architecture
+
+```
+fe-admin (:8082)          fe-user (:8080)
+       │                        │
+       └────── /api proxy ──────┘
+                  ▼
+         SolutionErp.Api (:5443)
+                  │
+   ┌──────────────┼──────────────┐
+   ▼              ▼              ▼
+ Application   Domain      Infrastructure ── SQL Server
+```
+
+## Tech stack
+
+- **Backend:** .NET 10 + Clean Architecture + CQRS (MediatR) + FluentValidation + AutoMapper + EF Core + ASP.NET Identity + JWT
+- **Frontend:** React 18 + Vite + TypeScript + Tailwind + shadcn/ui + TanStack Query
+- **DB:** SQL Server 2022
+- **Deploy:** Windows Server + IIS
+
+## Roadmap
+
+| Phase | Tuần | Focus |
+|---|---|---|
+| 0 Draft | T1 | Scaffold, parse FORM + QUY_TRINH |
+| 1 Alpha Core | T2-4 | Auth, Permission, CRUD master |
+| 2 Form Engine | T5-6 | Render template docx/xlsx |
+| 3 Workflow | T7-9 | State machine 9 phase |
+| 4 Report + Polish | T10-11 | Dashboard + Excel export |
+| 5 Production | T12-13 | CI/CD IIS, UAT, go-live |
+
+Chi tiết ở [`docs/changelog/migration-todos.md`](docs/changelog/migration-todos.md).
+
+## License
+
+Proprietary — Công ty TNHH Xây dựng Solutions.