[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>

.gitignore

@@ -0,0 +1,79 @@
+# =============================================================
+# .NET
+# =============================================================
+bin/
+obj/
+out/
+*.user
+*.suo
+*.ide/
+*.VisualState.xml
+*.pidb
+*.booproj
+*.svd
+*.pdb
+*.mdb
+.vs/
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# EF Core migrations scratch
+src/**/Migrations/*.Designer.cs.bak
+
+# =============================================================
+# Node / React / Vite
+# =============================================================
+node_modules/
+dist/
+dist-ssr/
+.vite/
+*.local
+coverage/
+.eslintcache
+
+# =============================================================
+# Logs
+# =============================================================
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# =============================================================
+# Editor / OS
+# =============================================================
+.idea/
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+Thumbs.db
+desktop.ini
+.DS_Store
+
+# =============================================================
+# Secrets / env
+# =============================================================
+appsettings.*.Local.json
+appsettings.Production.json
+*.env
+.env.local
+.env.*.local
+src/Backend/SolutionErp.Api/.env
+
+# =============================================================
+# Build artifacts / uploads
+# =============================================================
+src/Backend/SolutionErp.Api/wwwroot/uploads/
+src/Backend/SolutionErp.Api/wwwroot/exports/
+
+# =============================================================
+# Claude / skills (keep tracked — these ARE source of truth)
+# =============================================================
+# .claude/  ← DO NOT ignore, skills are committed
+!.claude/
+!.claude/**