Problem:
- Windows users experiencing 10-minute timeout during first build
- Network detection didn't help users with low latency but slow downloads
- Native compilation and antivirus scanning make Windows builds slower
Solution:
1. Increase timeout: Windows 15min (from 10min), other platforms 10min (from 5min)
2. Smart retry: Auto-retry with CN mirror if first attempt times out
3. Better UX: Show expected time (10-15min for Windows first build)
4. Documentation: Add Windows timeout troubleshooting to FAQ
Technical changes:
- BaseBuilder.ts: Implement try-catch with automatic mirror fallback
- FAQ: Document the issue, causes, and solutions in both EN/CN
- User-friendly messages for first-time setup expectations
Fixes#1071
