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

feat: integrate local architecture with HF Space

Clarify prediction reliability display

Clarify watchlist quick estimates

Fix HF queue prediction placeholders

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

feat: add institutional signals and HF-friendly deploy

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

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

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