Fix navigation controls - long-press and double-tap only

- Removed quick-tap navigation (was interfering with map panning)
- Keep long-press (500ms hold) as primary navigation method
- Added double-tap as fallback for browsers with touch issues
- Double-click also works on desktop in navigation mode
- No single taps trigger navigation, allowing normal map interaction

This ensures map panning works normally while providing two clear
methods to set navigation destinations.

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

Co-Authored-By: Claude <noreply@anthropic.com>

index.html

@@ -4152,6 +4152,8 @@
         let isPressing = false;
         let pendingDestination = null;
         let touchStartTime = 0;
+        let lastTapTime = 0;
+        let lastTapLocation = null;
 
         // Navigation confirmation dialog handlers
         document.getElementById('navConfirmYes').addEventListener('click', () => {
@@ -4242,18 +4244,34 @@
 
         mapContainer.addEventListener('touchend', function(e) {
             if (navMode) {
-                e.preventDefault();
+                const now = Date.now();
+                const timeSinceLastTap = now - lastTapTime;
+
+                // Check for double-tap (two taps within 300ms at roughly same location)
+                if (timeSinceLastTap < 300 && lastTapLocation && pendingDestination) {
+                    // Double-tap detected - show navigation dialog
+                    e.preventDefault();
+                    e.stopPropagation();
 
-                // If press-and-hold didn't trigger (quick tap), show navigation dialog immediately
-                const tapDuration = Date.now() - touchStartTime;
-                if (tapDuration < 300 && !isPressing && pendingDestination) {
-                    // Quick tap detected - show navigation dialog
                     document.getElementById('pressHoldIndicator').style.display = 'none';
                     const message = `Navigate to ${pendingDestination.track.name}?`;
                     document.getElementById('navConfirmMessage').textContent = message;
                     document.getElementById('navConfirmDialog').style.display = 'flex';
+
+                    lastTapTime = 0; // Reset to prevent triple tap
+                    lastTapLocation = null;
+                } else {
+                    // Store this tap for double-tap detection
+                    lastTapTime = now;
+                    if (e.touches.length === 0 && e.changedTouches.length > 0) {
+                        const touch = e.changedTouches[0];
+                        lastTapLocation = { x: touch.clientX, y: touch.clientY };
+                    }
                 }
 
+                if (isPressing) {
+                    e.preventDefault();
+                }
                 cancelPressHold();
             } else if (isPressing) {
                 e.preventDefault();
@@ -4315,7 +4333,21 @@
         });
 
         map.on('dblclick', (e) => {
-            if (currentTool === 'draw' && isDrawing) {
+            if (navMode) {
+                // In navigation mode, double-click sets destination
+                L.DomEvent.stopPropagation(e);
+                L.DomEvent.preventDefault(e);
+
+                // Find nearest track point
+                const nearest = findNearestTrackPoint(e.latlng);
+                if (nearest && nearest.distance < 50) {
+                    // Show navigation dialog
+                    pendingDestination = nearest;
+                    const message = `Navigate to ${nearest.track.name}?`;
+                    document.getElementById('navConfirmMessage').textContent = message;
+                    document.getElementById('navConfirmDialog').style.display = 'flex';
+                }
+            } else if (currentTool === 'draw' && isDrawing) {
                 L.DomEvent.stopPropagation(e);
                 finishDrawing();
             }