Add debug lines for ship's wheel

- Green crosshair at wheel center
- Bounding box showing wheel dimensions
- Helps visualize wheel positioning

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

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

src/scenes/ShipDeckScene.js

@@ -252,6 +252,17 @@ export default class ShipDeckScene extends Phaser.Scene {
             // Open the map scene
             this.scene.start('MapScene', { inventory: this.inventory });
         });
+
+        // Debug: Draw lines for wheel positioning
+        const debugLines = this.add.graphics();
+        debugLines.lineStyle(2, 0x00FF00, 0.8);
+
+        // Center crosshair
+        debugLines.lineBetween(550 - 50, 200, 550 + 50, 200); // Horizontal
+        debugLines.lineBetween(550, 200 - 50, 550, 200 + 50); // Vertical
+
+        // Bounding box (radius 40)
+        debugLines.strokeRect(550 - 40, 200 - 40, 80, 80);
     }
 
     createInventoryDisplay() {