Fix INTRADAY validation day-rollover bug + scope self-learning notes by timeframe

Force 1D range-only, volatility-scaled ML caps, sector-mode Top Picks, self-learning throttle + collapsible panel

Self-learning: fix N=0 (missing validation cols), all-history window, why-missed notes; INTRADAY final-call cache after close

Restructure ML card, split AI/ML self-learning, fix Kelly block + news order + intraday-only refresh

Validation: tag AI vs ML hits/misses and filter by source

refactor: extract shared llm_client.py + per-day cache + LLM self-learning + HF Spaces paths

fix: server-side validation scheduler at 4:30pm IST + history persistence

feat: learnings.json as canonical store — prune validated snapshots + auto-load UI

feat: watchlist AI-recommended trades, timeframe auto-close, self-realizing AI