Adds synthetic "Your location" stop A when GPS granted; place
detail panel slides in on search result click with Directions /
Add stop / Save (stub) / Share actions; elevation via Valhalla
/height; react-hot-toast for feedback; pendingDestination state
for GPS-denied Directions flow.
Phase 3 Step 5 C1 of Navi.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
