e7610ddcac
1. Add _extract_core_subject() to strip noise words before X search - X search is literal keyword matching, not semantic - "best open claw usecases" → "open claw" (27 results vs 0) 2. Fix ISO date detection bug - Was: if "T" in created_at (matched "Tue" in "Tue Feb 03...") - Now: if created_at[10] == "T" (proper ISO separator check) - Dates now parse correctly: (2026-02-03) instead of (date unknown) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>