Add touchstart fallback and adjust interaction lockout

Introduce `touchstart` event listener as a fallback for older browsers lacking Pointer Events, and reduce the interaction lockout timer from 220ms to 150ms to prevent accidental orbit drags after a slap.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 418bf6f8-212b-4bb0-a7a5-8231a061da4e
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: b1d20c43-904b-495f-9262-401975d950d3
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/9f85e954-647c-46a5-90a7-396e495a805a/418bf6f8-212b-4bb0-a7a5-8231a061da4e/Q83Uqvu
Replit-Helium-Checkpoint-Created: true

the-matrix/js/interaction.js

@@ -39,27 +39,47 @@ export function initInteraction(camera, renderer) {
   // Capture phase so we intercept before OrbitControls' bubble-phase handler.
   // If Timmy is hit we call stopImmediatePropagation() to suppress the orbit drag.
   _canvas.addEventListener('pointerdown', _onPointerDown, { capture: true });
+
+  // touchstart fallback for older mobile browsers that lack Pointer Events
+  if (!window.PointerEvent) {
+    _canvas.addEventListener('touchstart', _onTouchStart, { capture: true, passive: false });
+  }
 }
 
-function _onPointerDown(event) {
-  if (!_timmyGroup || !_applySlap || !_camera) return;
+function _hitTest(clientX, clientY) {
+  if (!_timmyGroup || !_applySlap || !_camera) return false;
 
   const rect = _canvas.getBoundingClientRect();
-  _pointer.x = ((event.clientX - rect.left) / rect.width)  *  2 - 1;
-  _pointer.y = ((event.clientY - rect.top)  / rect.height) * -2 + 1;
+  _pointer.x = ((clientX - rect.left) / rect.width)  *  2 - 1;
+  _pointer.y = ((clientY - rect.top)  / rect.height) * -2 + 1;
 
   _raycaster.setFromCamera(_pointer, _camera);
   const hits = _raycaster.intersectObject(_timmyGroup, true);
 
   if (hits.length > 0) {
-    event.stopImmediatePropagation(); // block OrbitControls drag
     _applySlap(hits[0].point);
-
-    // Re-enable orbit after a short pause to avoid accidental rotation
+    // 150 ms lockout to avoid accidental orbit drag immediately after a slap
     if (controls) {
       controls.enabled = false;
-      setTimeout(() => { if (controls) controls.enabled = true; }, 220);
+      setTimeout(() => { if (controls) controls.enabled = true; }, 150);
     }
+    return true;
+  }
+  return false;
+}
+
+function _onPointerDown(event) {
+  if (_hitTest(event.clientX, event.clientY)) {
+    event.stopImmediatePropagation(); // block OrbitControls drag
+  }
+}
+
+function _onTouchStart(event) {
+  if (!event.touches || event.touches.length === 0) return;
+  const t = event.touches[0];
+  if (_hitTest(t.clientX, t.clientY)) {
+    event.stopImmediatePropagation();
+    event.preventDefault(); // suppress subsequent mouse events (ghost click)
   }
 }
 
@@ -75,6 +95,9 @@ export function disposeInteraction() {
   if (_canvas) {
     _canvas.removeEventListener('contextmenu', _noCtxMenu);
     _canvas.removeEventListener('pointerdown', _onPointerDown, { capture: true });
+    if (!window.PointerEvent) {
+      _canvas.removeEventListener('touchstart', _onTouchStart, { capture: true });
+    }
     _canvas = null;
   }
   if (controls) {