feat: 增强用户数据库同步可靠性

fix: 修复日期格式转换问题

feat: 优化日期显示格式

feat: 添加支付记录和最近登录字段，优化日期显示

fix: refine session logic and finalize swagger security

fix: handle numeric rate limit strings by appending /second automatically

feat: make api rate limits configurable via env vars

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

feat: enhance admin order management with status toggling and fullscreen modal

feat: implement user order history in admin panel

feat: implement user deletion in admin panel

style: refine AdminPanel UI and logic based on feedback

fix: correct dict unpacking in admin_get_users to resolve validation error

fix: add missing decorator import in api.py to resolve runtime error

feat: implement super-admin account and management dashboard

feat: complete manual payment transition and remove vmq residue

fix: load dotenv for VMQ_SECRET and prioritize backend URL in modal

fix: exhaustive vmq path and qr format compatibility fixes

fix: resolve QR code error by standardizing JSON format and public URL detection

fix: resolve NameError for VMQ_SECRET in api.py

fix: exhaustive stability fixes for Vmq monitoring app connection

fix: use PlainTextResponse for Vmq compatibility and update QR format

fix: add vmq heartbeat and support root-level routing for app compatibility

fix: standardize Vmq Notify URL without /api prefix

feat: refine auth rate limits to 1/sec per-IP and 10/sec global

feat: add rate limiting to register and login endpoints (10/sec)

fix: correct database migration logic using text()

feat: support flexible VIP pricing and duration selection

fix: ensure static directory exists before mounting

feat: display static qr code images directly in payment modal

fix: restore missing router import in main.py

feat: sync qr codes from dataset on startup

feat: implement user auth, daily limits, and built-in Vmq payment gateway

实现用户鉴权与支付模块：接入SQLite持久化、V免签回调、VIP权益校验及HF Dataset自动同步

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

添加市场类型数量调试日志

修复ETF/LOF/REITs单独筛选问题

feat: 添加全A股市场筛选支持

fix: Switch to download-based Parquet loading to resolve DuckDB httpfs issues in HF Space

fix: Robust remote Parquet mounting with local list caching

fix: Resolve remote Parquet mounting issues with authentication and explicit file listing

feat: Add market selection dropdown to home screen

fix: Set scheduler timezone to Asia/Shanghai for accurate daily sync

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

feat: Add APScheduler for automatic daily incremental sync at 17:30

fix: Scalar subquery error in kline data fetching

perf: Optimize database queries and reduce latency for game start

perf: Add memory cache for eligible stocks to speed up game start

feat: Implement background sync task in API