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CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+**ojnext** is the frontend for an Online Judge platform. Built with Vue 3 + TypeScript using Rsbuild (Rust-based bundler), Naive UI component library, Pinia for state management, and Vue Router.
+
+## Commands
+
+```bash
+npm start              # Start dev server on port 5173
+npm run build          # Production build
+npm run build:staging  # Staging build
+npm run build:test     # Test build
+npm fmt                # Format with Prettier
+```
+
+No test suite is configured. Linting is via Prettier only.
+
+## Architecture
+
+### Directory Structure
+
+```
+src/
+├── shared/        # Cross-cutting concerns: layout, stores, composables, API
+├── oj/            # User-facing features (problems, submissions, contests, etc.)
+├── admin/         # Admin panel features
+├── utils/         # Constants, types, HTTP client, helpers
+├── routes.ts      # Route definitions (two top-level: ojs, admins)
+├── main.ts        # App entry point
+└── App.vue        # Root component with Naive UI theme setup
+```
+
+### Module Pattern
+
+Each feature module (under `oj/` or `admin/`) typically has:
+- `views/` — page-level Vue components
+- `components/` — feature-specific components
+- `api.ts` — API calls specific to the feature
+
+Shared logic lives in `shared/`:
+- `store/` — Pinia stores (user, config, authModal, screenMode, loginSummary)
+- `composables/` — reusable composables (pagination, WebSocket, sync, etc.)
+- `layout/` — `default.vue` and `admin.vue` layout wrappers
+- `api.ts` — shared API calls
+
+### Auto-Imports
+
+Configured via `unplugin-auto-import` and `unplugin-vue-components`. You do **not** need to manually import:
+- Vue APIs (`ref`, `computed`, `watch`, etc.)
+- Vue Router (`useRouter`, `useRoute`)
+- Pinia (`defineStore`, `storeToRefs`)
+- VueUse composables
+- Naive UI composables (`useDialog`, `useMessage`, `useNotification`, `useLoadingBar`)
+- Naive UI components (all `N*` components)
+
+Generated type declaration files: `src/auto-imports.d.ts`, `src/components.d.ts`.
+
+### Path Aliases
+
+```
+utils  →  ./src/utils
+oj     →  ./src/oj
+admin  →  ./src/admin
+shared →  ./src/shared
+```
+
+### HTTP Client
+
+`utils/http.ts` — Axios instance with interceptors. All API calls proxy through the dev server:
+- `/api` and `/public` → `PUBLIC_OJ_URL` (backend)
+- `/ws` → `PUBLIC_WS_URL` (WebSocket backend)
+
+### Key Utilities
+
+- `utils/constants.ts` — Judge status codes, language IDs, difficulty levels, contest types
+- `utils/types.ts` — TypeScript interfaces for all domain models
+- `utils/permissions.ts` — Permission check helpers
+- `utils/judge.ts` — Judge-related utilities
+- `utils/renders.ts` — Table column render helpers for Naive UI DataTable
+
+### Environment Variables
+
+Variables prefixed with `PUBLIC_` are injected at build time. Env files: `.env`, `.env.staging`, `.env.test`.
+
+| Variable | Purpose |
+|---|---|
+| `PUBLIC_OJ_URL` | Backend REST API base URL |
+| `PUBLIC_WS_URL` | WebSocket server URL |
+| `PUBLIC_ENV` | Environment name (dev/staging/production) |
+| `PUBLIC_CODE_URL` | Code execution service |
+| `PUBLIC_JUDGE0_URL` | Judge0 API |
+| `PUBLIC_MAXKB_URL` | Knowledge base service |
+| `PUBLIC_SIGNALING_URL` | WebRTC signaling server |
+| `PUBLIC_ICONIFY_URL` | Iconify icon CDN |
+
+### Routing
+
+Routes are defined in `src/routes.ts` with two root routes: `ojs` (user-facing) and `admins` (admin panel). Route meta fields used:
+- `requiresAuth` — redirect to login if not authenticated
+- `requiresSuperAdmin` — super admin only
+- `requiresProblemPermission` — problem management access
+
+### Real-time Features
+
+- WebSocket via composable in `shared/composables/` for submission status updates
+- Yjs + y-webrtc for collaborative editing in the flowchart editor
+
+## Related Repository
+
+The backend is at `D:\Projects\OnlineJudge` — a Django 5 + DRF project. See its CLAUDE.md for backend details.