feat: Phase 0 — monorepo 骨架 + 全表迁移 + FastAPI/Next 骨架 + CI

- uv(workspace) + pnpm monorepo；docker-compose(pg+api+web)
- SQLAlchemy 16 MVP 表 + Alembic 初版迁移(无漂移，users stub)
- FastAPI 骨架：统一错误信封(带 request_id) + structlog + /jobs/:id + OpenAPI
- Next.js 骨架：纸感主题 token + OpenAPI→TS 客户端代码生成(gen:api)
- CI(ruff/mypy/pytest + pg service + alembic 漂移校验)
- 四份设计规格(PRODUCT/UX/ARCHITECTURE/DEV_PLAN) + CLAUDE.md

apps/web/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "web",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint",
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run",
+    "gen:api": "node scripts/gen-api.mjs"
+  },
+  "dependencies": {
+    "next": "15.1.3",
+    "openapi-fetch": "^0.13.0",
+    "react": "19.0.0",
+    "react-dom": "19.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^22.10.0",
+    "@types/react": "19.0.0",
+    "@types/react-dom": "19.0.0",
+    "autoprefixer": "^10.4.20",
+    "eslint": "^9.17.0",
+    "eslint-config-next": "15.1.3",
+    "openapi-typescript": "^7.5.0",
+    "postcss": "^8.4.49",
+    "tailwindcss": "^3.4.17",
+    "typescript": "^5.7.2",
+    "vitest": "^2.1.8"
+  }
+}