Rendering optimization:
- Extract stable routePatterns derived value to avoid expensive useMemo
recomputation on enable/disable toggle (only recompute when patterns change)
- Stabilize all RouteCard callback props with useCallback+useRef pattern
- Pre-compute missingTokenSiteItems as useMemo index instead of per-render call
- Add EMPTY_MISSING_ITEMS constant for stable empty array reference
Infinite scroll:
- Replace manual "load more" button with IntersectionObserver sentinel
- Auto-load next chunk when scrolling within 200px of bottom
Hureru
a0e474c561