Implement manual player movement planning (steps) and hopping animation

- GameEngine: Added path planning logic (click to add step, re-click to undo).
- GameRenderer: Added path visualization (numbered yellow squares).
- GameRenderer: Updated animation to include 'hopping' effect and clear path markers on visit.
- UIManager: Replaced alerts with modals.
- Main: Wired right-click to execute movement.

src/main.js

@@ -87,6 +87,10 @@ generator.onDoorBlocked = (exitData) => {
     renderer.blockDoor(exitData);
 };
 
+game.onPathChange = (path) => {
+    renderer.updatePathVisualization(path);
+};
+
 // 6. Handle Clicks
 const handleClick = (x, y, doorMesh) => {
     // PRIORITY 1: Tile Placement Mode - ignore all clicks
@@ -134,7 +138,10 @@ const handleClick = (x, y, doorMesh) => {
 renderer.setupInteraction(
     () => cameraManager.getCamera(),
     handleClick,
-    () => { } // No right-click
+    () => {
+        // Right Click Handler
+        game.executeMovePath();
+    }
 );
 
 // 7. Start