# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Commands

```bash
# Development server
npm run dev

# Build
npm run build          # production
npm run build:dev      # development build (VITE_ENV=development)
npm run build:prod     # production build (VITE_ENV=production)

# Type checking
npm run typecheck

# Linting
npm run lint

# Unit tests (vitest)
npm run test           # run once
npm run test:watch     # watch mode

# E2E tests (playwright)
npm run test:e2e
```

To run a single unit test file:
```bash
npx vitest run src/components/__tests__/AuthModal.test.tsx
```

## Architecture

### Provider Tree
`main.tsx` wraps everything in: `BrowserRouter → AuthProvider → LanguageProvider → AppRouter`

### Routing
Only two routes (`src/routes/AppRouter.tsx`):
- `/` → `App` (main app)
- `/auth/google/callback` → `AuthCallbackPage` (Google OAuth callback handler)

### Auth System
- **`AuthContext.tsx`** — React context providing `signIn`, `signUp`, `beginGoogleOAuth`, `completeGoogleOAuth`, `signOut`. Uses `useReducer` with `authMachine.ts`.
- **`authMachine.ts`** — Pure reducer + state types (`AuthPhase`, `AuthState`, `AuthAction`). No side effects — all async logic lives in `AuthContext`.
- **`authService.ts`** — Calls backend API for login/register/Google OAuth/user info. Decodes JWT payload client-side to extract `UserInfo`. Handles session restore from `localStorage`.
- **`lib/api.ts`** — `http` client wrapper with `tokenManager` (stores JWT in `localStorage` under key `texpixel_token`). Adds `Authorization` header automatically. Throws `ApiError` for non-success business codes.

### Environment / API
- **`src/config/env.ts`** — Switches API base URL based on `VITE_ENV` env var:
  - `development`: `https://cloud.texpixel.com:10443/doc_ai/v1`
  - `production`: `https://api.texpixel.com/doc_ai/v1`
- The API uses a custom response envelope: `{ request_id, code, message, data }`. Success is `code === 200` (some endpoints also accept `0`).

### Main App Flow (`App.tsx`)
Three-panel layout: `LeftSidebar | FilePreview | ResultPanel`

Core data flow:
1. On auth, `loadFiles()` fetches paginated task history from `/task/list`
2. File upload goes: compute MD5 → get OSS pre-signed URL (`/oss/signature_url`) → PUT to OSS → create task (`/formula/recognition`) → poll every 2s for result
3. Results cached in `resultsCache` ref (keyed by `task_id`) to avoid redundant API calls
4. Guest users get 3 free uploads tracked via `localStorage` (`texpixel_guest_usage_count`)

### Internationalization
`LanguageContext.tsx` supports `en` / `zh`. Language is auto-detected via IP (`lib/ipLocation.ts`) on first visit, persisted to `localStorage` on manual switch. All UI strings come from `lib/translations.ts` via `const { t } = useLanguage()`.

### Key Type Definitions
- `src/types/api.ts` — All API request/response types, `TaskStatus` enum, `ApiErrorCode` enum, `ApiErrorMessages` map
- `src/types/index.ts` — Internal app types (`FileRecord`, `RecognitionResult`)

### Tests
- Unit tests: `src/components/__tests__/` and `src/contexts/__tests__/`, run with vitest + jsdom + `@testing-library/react`
- E2E tests: `e2e/` directory, run with Playwright
- Setup file: `src/test/setup.ts`