- Add public /leaderboard/status endpoint (no auth required)
- Add LeaderboardService in mobile-app to fetch board status
- Update RankingPage to show "待开启" when board is disabled
- Connect admin-web leaderboard page to real API
- Board toggle now takes effect immediately
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
hailin
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