Revert "fix: Remove duplicate RABBIT declaration and move toggleDebug function"

This reverts commit bcd61b7433.

js/main.js

@@ -68,11 +68,6 @@ function resizeCanvas() {
     canvas.height = window.innerHeight - document.querySelector('.controls').offsetHeight;
 }
 
-function toggleDebug() {
-    debugMode = !debugMode;
-    document.getElementById('debug-btn').classList.toggle('active');
-}
-
 function simulationLoop(timestamp) {
     // Calculate FPS
     const deltaTime = timestamp - lastFrameTime;