Make WASD movement relative to map rotation

- W now moves toward top of screen (map bearing direction)
- S moves toward bottom of screen
- A/D move left/right relative to current view
- Works for both on-screen buttons and keyboard WASD
- Uses destinationPoint() for accurate geographic movement

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

index.html

@@ -6826,21 +6826,30 @@
                 updateStatus('Test mode enabled via keyboard', 'info');
             }
 
-            // Move in the specified direction
+            // Move in the specified direction, accounting for map rotation
+            const mapBearing = map.getBearing();
+            let moveBearing;
             switch (key) {
                 case 'w':
-                    testPosition.lat += GPS_TEST_STEP;
+                    moveBearing = mapBearing;  // Forward
+                    break;
+                case 'd':
+                    moveBearing = mapBearing + 90;  // Right
                     break;
                 case 's':
-                    testPosition.lat -= GPS_TEST_STEP;
+                    moveBearing = mapBearing + 180;  // Backward
                     break;
                 case 'a':
-                    testPosition.lng -= GPS_TEST_STEP;
-                    break;
-                case 'd':
-                    testPosition.lng += GPS_TEST_STEP;
+                    moveBearing = mapBearing + 270;  // Left
                     break;
             }
+            moveBearing = ((moveBearing % 360) + 360) % 360;
+
+            const stepMeters = GPS_TEST_STEP * 111000;
+            const currentLngLat = [testPosition.lng, testPosition.lat];
+            const newLngLat = destinationPoint(currentLngLat, stepMeters, moveBearing);
+            testPosition.lat = newLngLat[1];
+            testPosition.lng = newLngLat[0];
 
             e.preventDefault();
             simulateGpsPosition();
@@ -6900,22 +6909,40 @@
                     updateStatus('Test mode enabled via controls', 'info');
                 }
 
-                // Move in the specified direction
+                // Move in the specified direction, accounting for map rotation
+                // Get current map bearing (0 = north up, 90 = east up, etc.)
+                const mapBearing = map.getBearing();
+
+                // Calculate movement bearing based on key pressed
+                // W = forward (map bearing), D = right (+90), S = back (+180), A = left (+270)
+                let moveBearing;
                 switch (dir) {
                     case 'w':
-                        testPosition.lat += GPS_TEST_STEP;
+                        moveBearing = mapBearing;  // Forward (top of screen)
+                        break;
+                    case 'd':
+                        moveBearing = mapBearing + 90;  // Right
                         break;
                     case 's':
-                        testPosition.lat -= GPS_TEST_STEP;
+                        moveBearing = mapBearing + 180;  // Backward (bottom of screen)
                         break;
                     case 'a':
-                        testPosition.lng -= GPS_TEST_STEP;
-                        break;
-                    case 'd':
-                        testPosition.lng += GPS_TEST_STEP;
+                        moveBearing = mapBearing + 270;  // Left
                         break;
                 }
 
+                // Normalize bearing to 0-360
+                moveBearing = ((moveBearing % 360) + 360) % 360;
+
+                // Use destinationPoint to calculate new position
+                // GPS_TEST_STEP is in degrees, convert to approximate meters (1 degree ≈ 111000m)
+                const stepMeters = GPS_TEST_STEP * 111000;
+                const currentLngLat = [testPosition.lng, testPosition.lat];
+                const newLngLat = destinationPoint(currentLngLat, stepMeters, moveBearing);
+
+                testPosition.lat = newLngLat[1];
+                testPosition.lng = newLngLat[0];
+
                 simulateGpsPosition();
             };