- Add warning notes in new-address-api and mail-api docs
- Explain the difference between Address JWT and User JWT
- Create dedicated 'API Endpoints' section in sidebar
- Update both zh and en documentation
Refs #910
- Add daily request limit per IP in blacklist settings (1-1,000,000/day)
- Refactor access control logic: merge blacklist and rate limit checks
- Remove RATE_LIMIT_API_DAILY_REQUESTS env var, use database config instead
- Move x-custom-auth check earlier in middleware chain
- Add comprehensive English documentation (31 new guide pages)
- Improve code structure and error handling
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