feat: unify all system time records to Beijing Time (UTC+8)

修复同步稳定性与远程视图冲突

修复ETF/LOF/REITs数据同步接口并移除调试日志

feat: Implement hot reload for daily incremental sync in HF Space

feat: Finalize cloud-compatible incremental sync logic and market selection

feat: Add market selection dropdown to home screen

perf: Implement real trading day calendar for smarter incremental sync

feat: Simplify trading panel with dual buy/sell buttons and improved position controls

fix: Improve REITs and Index sync compatibility

fix: Add retry logic for AkShare to maximize data completeness (turnover rate)

fix: Correct REITs interface, Yahoo Finance suffixes, and sync limit logic

fix: Update sync script with latest AkShare interfaces and North Exchange support

feat: Finalize sync logic with full-market support and robust incremental updates

fix: Prioritize existing stocks in sync to ensure continuous incremental updates

fix: Add database fallback for target list fetching to support offline sync in HF

fix: Improve stability with cache invalidation and robust DB connection management

feat: Expand sync to 10 years and add Convertible Bonds and REITs support

feat: Implement incremental sync for stocks, funds, and time

feat: Add Yahoo Finance as fallback data source for overseas environments

fix: Add retry logic and alternative interface for stock list fetching

feat: Complete stock trading simulation system