fix: contain ball in ball bounce simulation.

app/(core)/constants/Utils.js

@@ -61,7 +61,7 @@ export function collideBoundary(pos, vel, bounds, radius, restitution, acc) {
   const hitFloor = ballBottomEdge > bounds.h;
   if (hitCeiling) {
     const collisionPenetration = 0 - ballTopEdge;
-    newPos.y = radius + collisionPenetration;
+    newPos.y = collisionPenetration;
     newVel.y = Math.abs(newVel.y) * restitution;
   } else if (hitFloor) {
     const collisionPenetration = ballBottomEdge - bounds.h;
@@ -81,6 +81,29 @@ export function collideBoundary(pos, vel, bounds, radius, restitution, acc) {
     }
   }
 
+  // ⚡ HARD CONTAINMENT: Ensure ball stays within bounds even at extreme velocities
+  // This prevents "tunneling" when the ball moves too fast for collision detection
+  const minX = radius;
+  const maxX = bounds.w - radius;
+  const minY = radius;
+  const maxY = bounds.h - radius;
+
+  if (newPos.x < minX) {
+    newPos.x = minX;
+    if (newVel.x < 0) newVel.x = Math.abs(newVel.x) * restitution;
+  } else if (newPos.x > maxX) {
+    newPos.x = maxX;
+    if (newVel.x > 0) newVel.x = -Math.abs(newVel.x) * restitution;
+  }
+
+  if (newPos.y < minY) {
+    newPos.y = minY;
+    if (newVel.y < 0) newVel.y = Math.abs(newVel.y) * restitution;
+  } else if (newPos.y > maxY) {
+    newPos.y = maxY;
+    if (newVel.y > 0) newVel.y = -Math.abs(newVel.y) * restitution;
+  }
+
   return { pos: newPos, vel: newVel };
 }