Improve dashboard latency caching

Backup current stock predictor strategies

Merge remote-tracking branch 'hf/main' into codex/self-refine-validation-gate

feat: integrate local architecture with HF Space

Clarify watchlist quick estimates

feat: quick-estimate + background ML + auto-poll

feat: add Market Scan recommendation dashboard

feat: add chip_score, MA120/240, margin flow, and TA distillation

feat: add institutional signals and HF-friendly deploy

feat: comprehensive optimization — 30 improvements across ML, perf, frontend, security, architecture

feat: walk-forward backtest, US currency, mobile RWD, Gemini news summary

feat: realtime quote (twstock + yfinance), today change %, 30s auto-refresh

feat: restore BacktestPanel — historical backtest UI recovered from git history

feat: market tabs (台股/美股/基金), autocomplete search, favorites filter tabs