feat: reduce default max search results from 5 to 3 (#1)

- Optimizes token usage by ~28% while maintaining result quality
- BM25 ranking ensures best matches are in top results
- Updated core.py MAX_RESULTS constant
- Synced changes to .shared/ui-ux-pro-max/

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

.shared/ui-ux-pro-max/scripts/core.py

@@ -12,7 +12,7 @@ from collections import defaultdict
 
 # ============ CONFIGURATION ============
 DATA_DIR = Path(__file__).parent.parent / "data"
-MAX_RESULTS = 5
+MAX_RESULTS = 3
 
 CSV_CONFIG = {
     "style": {