docs: Enhance bug report template and add comprehensive troubleshooting guide

- Enhanced bug report template with detailed log capture instructions
  - Added bug categorization system (6 main categories)
  - Frontend error capture guide (DevTools Console/Network tabs)
  - Backend log capture for Docker and PM2 deployments
  - Trading/decision logs location and usage
  - Comprehensive environment information checklist
  - Quick diagnostic tips for faster issue resolution
- Created bilingual troubleshooting guides (EN/ZH)
  - Common trading issues (e.g., Issue #202: only short positions)
  - Detailed explanation of Binance position mode requirements
  - AI decision problems and diagnostics
  - Connection and API error solutions
  - Frontend and database issues
  - Complete log capture instructions with commands
  - Emergency reset procedures
- Updated documentation cross-references
  - Added troubleshooting guide links to bug report template
  - Added links in README Common Issues section
  - Bilingual support for better accessibility
This reduces maintainer workload by helping users self-diagnose issues
and submit higher-quality bug reports with all necessary information.
Addresses Issue #202 root cause documentation.
Co-Authored-By: tinkle-community <tinklefund@gmail.com>

README.md

@@ -1168,6 +1168,8 @@ GET /api/health                   # Health check
 
 ## 🛠️ Common Issues
 
+> 📖 **For detailed troubleshooting:** See the comprehensive [Troubleshooting Guide](docs/guides/TROUBLESHOOTING.md) ([中文版](docs/guides/TROUBLESHOOTING.zh-CN.md))
+
 ### 1. Compilation error: TA-Lib not found
 
 **Solution**: Install TA-Lib library