feat(rmaps): UX parity with rmaps-online — route overlay, ping cooldown, session persistence
Phase 1: Route double-layer outline, ScaleControl, route instruction summary,
Enter key in meeting search, select-all toggle in import preview, fitToParticipants FAB.
Phase 2: Ping All sidebar button, push vibrate+requireInteraction, 30s ping cooldown,
bundled QR code (qrcode package with external API fallback), ping toast with vibration.
Phase 3: Location persistence across sessions (<30min restore), auto-start sharing preference.
Also fix pre-existing TS error in community-sync.ts (bulkForget changes array typing).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>