feat: 重构为 monorepo 结构，新增 cook CLI 和 types 共享包

- 将 scripts/ 迁移至 packages/cook CLI 工具（飞书 fetch、CSV convert、单元测试）
- 新增 packages/types 共享类型包，抽取 app/types 类型定义
- 更新依赖（nuxt 4.4、vite 8、eslint 10.1 等）
- 新增 vitest coverage 配置
- 更新文档和配置（CLAUDE.md、.env.example、pnpm-workspace）

CLAUDE.md

@@ -0,0 +1,89 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Cook (食用手册) is a Chinese recipe web/mobile app for finding recipes based on available ingredients. Built with Nuxt 4 (Vue 3, CSR-only), Ionic UI, and Capacitor for native iOS/Android apps. The UI and content are in Chinese.
+
+## Common Commands
+
+```bash
+pnpm install              # Install deps (auto-runs nuxt prepare via postinstall)
+pnpm convert              # Convert CSV recipe data → JSON (required before first run)
+pnpm dev                  # Dev server on http://localhost:3333
+pnpm lint                 # ESLint check (uses @antfu/eslint-config flat config)
+pnpm lint --fix           # Auto-fix lint issues
+pnpm typecheck            # TypeScript type checking via vue-tsc
+pnpm test                 # Run Vitest tests
+pnpm test -- --run        # Run tests once without watch
+pnpm build                # Full production build (convert + nuxt generate)
+```
+
+### Mobile Development
+
+```bash
+pnpm dev:ios              # iOS with live reload (cap run ios -l)
+pnpm dev:android          # Android dev
+pnpm ios                  # Open in Xcode
+pnpm android              # Open in Android Studio
+```
+
+## Architecture
+
+### Data Pipeline
+
+CSV source files (`app/data/recipe.csv`, `app/data/incompatible-foods.csv`) → `pnpm convert` (via `packages/cook` CLI) → JSON files (`app/data/recipe.json`, `app/data/incompatible-foods.json`) → consumed at runtime. The `pnpm fetch` command pulls fresh data from Feishu (飞书) API.
+
+### Monorepo Structure (pnpm workspaces)
+
+- **Root** — Nuxt app (main application)
+- **packages/cook** — CLI tool with `convert` and `fetch` commands
+- **docs** — VitePress documentation site
+- **scripts** — Build/utility scripts
+
+### App Source (`app/`)
+
+- **pages/** — Nuxt file-based routing; main interface uses Ionic tabs (`tabs.vue`)
+- **components/** — Organized by feature: `recipe/`, `tags/`, `layouts/`, `common/`
+- **composables/store/** — Pinia stores: `app`, `recipe`, `favorite`, `history`, `user`
+- **composables/** — Shared logic: `db.ts` (IndexedDB via Dexie), `dark.ts`, `recipe.ts`, `incompatible-foods.ts`
+- **data/** — Static JSON data + `food.ts` (food/tool definitions)
+- **types/** — TypeScript type definitions
+- **styles/** — SCSS including CSS variables (`css-vars.scss`)
+
+### Key Patterns
+
+- **CSR-only**: SSR is disabled in `nuxt.config.ts`; app is statically generated
+- **Client storage**: Dexie (IndexedDB) for favorites, history, user preferences — enables offline support
+- **Styling**: UnoCSS with Wind preset (Tailwind-compatible), attributify mode, and custom shortcuts (`tag`, `btn`)
+- **Dark mode**: Class-based via `@nuxtjs/color-mode` (classSuffix: '')
+- **Icons**: Iconify with multiple packs (carbon, mdi, twemoji); food tool icons dynamically safelisted in `uno.config.ts`
+
+### Prerendered Routes
+
+`/`, `/random`, `/help`, `/user`, `/404`, `/settings` are prerendered during static generation.
+
+## Testing
+
+Tests live in `test/` directory. Vitest uses jsdom environment with setup in `test/setup.ts`. Config in `vitest.config.ts`. Run a single test file:
+
+```bash
+pnpm test -- test/recipe.test.ts
+```
+
+## Code Style
+
+Uses `@antfu/eslint-config` (flat config) with UnoCSS and formatters enabled. Pre-commit hook runs `lint-staged` via `simple-git-hooks`. Ignored paths include `app/data/*.json`, `ios/`, `android/`, `dist/`.
+
+## Environment Variables
+
+See `.env.example`:
+
+- `FEISHU_APP_ID` / `FEISHU_APP_SECRET` — For fetching recipe data from Feishu
+- `APPLE_DEVELOPMENT_TEAM` — iOS signing
+
+## Node/Package Manager
+
+- Node: v22.20.0 (see `.nvmrc`)
+- pnpm: 10.32.1 (enforced via `packageManager` field)