fix: auto-zoom to street level when first GPS point arrives

When the map starts zoomed out (level 5), snap to zoom 16 on the first
real GPS position instead of keeping the overview level.

src/routes/fitness/[workout=fitnessWorkout]/[active=fitnessActive]/+page.svelte

@@ -229,8 +229,8 @@
 			const ll = [pt.lat, pt.lng];
 			liveMarker.setLatLng(ll);
 			liveMarker.setStyle({ opacity: 1, fillOpacity: 1 });
-			const zoom = liveMap.getZoom() || 16;
+			const zoom = liveMap.getZoom();
-			liveMap.setView(ll, zoom);
+			liveMap.setView(ll, zoom < 14 ? 16 : zoom);
 		}
 	});