fix: poll iframe for canvas instead of load event for accurate Nitro ready detection

resources/themes/atom/views/client/nitro.blade.php

@@ -807,11 +807,17 @@
         }
     }
     if (iframe) {
-        iframe.addEventListener('load', function() {
-            var elapsed = Date.now() - startTime;
-            var minWait = Math.max(0, 4500 - elapsed);
-            setTimeout(hideOverlay, minWait);
-        });
+        var poll = setInterval(function() {
+            try {
+                var doc = iframe.contentDocument || iframe.contentWindow?.document;
+                if (doc && doc.querySelector('canvas')) {
+                    clearInterval(poll);
+                    var elapsed = Date.now() - startTime;
+                    var minWait = Math.max(0, 3000 - elapsed);
+                    setTimeout(hideOverlay, minWait);
+                }
+            } catch(e) {}
+        }, 200);
     }
     setTimeout(hideOverlay, 15000);
 })();

resources/themes/dusk/views/client/nitro.blade.php

@@ -668,11 +668,17 @@
             }
         }
         if (iframe) {
-            iframe.addEventListener('load', function() {
-                var elapsed = Date.now() - startTime;
-                var minWait = Math.max(0, 4500 - elapsed);
-                setTimeout(hideOverlay, minWait);
-            });
+            var poll = setInterval(function() {
+                try {
+                    var doc = iframe.contentDocument || iframe.contentWindow?.document;
+                    if (doc && doc.querySelector('canvas')) {
+                        clearInterval(poll);
+                        var elapsed = Date.now() - startTime;
+                        var minWait = Math.max(0, 3000 - elapsed);
+                        setTimeout(hideOverlay, minWait);
+                    }
+                } catch(e) {}
+            }, 200);
         }
         setTimeout(hideOverlay, 15000);
     })();