feat(MainModal): clear iframe breadcrumbs on back navigation

feat(Discover): scroll modal content to top and clear breadcrumbs on item navigation

src/components/Elements/MainModal/Main.jsx

@@ -206,6 +206,8 @@ function MainModal({ modalClose, deepLinkData }) {
   };
 
   const handleBack = () => {
+    // Clear iframe breadcrumbs when navigating back
+    setIframeBreadcrumbs([]);
     window.history.back();
   };
 

src/features/misc/views/Discover.jsx

@@ -181,6 +181,13 @@ function DiscoverContent({ category, onBreadcrumbsChange }) {
         case 'marketplace:breadcrumbs':
           if (payload?.breadcrumbs && onBreadcrumbsChange) {
             onBreadcrumbsChange(payload.breadcrumbs);
+            // Scroll modal content to top when navigating to an item
+            if (payload.breadcrumbs.length > 0) {
+              const modalContent = document.querySelector('.modalTabContent');
+              if (modalContent) {
+                modalContent.scrollTop = 0;
+              }
+            }
           }
           break;
 
@@ -206,6 +213,11 @@ function DiscoverContent({ category, onBreadcrumbsChange }) {
   const handleLoad = () => {
     setIsLoading(false);
 
+    // Clear breadcrumbs when iframe loads - if on an item page, iframe will send new breadcrumbs
+    if (onBreadcrumbsChange) {
+      onBreadcrumbsChange([]);
+    }
+
     // Send theme to iframe after it loads
     if (iframeRef.current?.contentWindow) {
       const theme = getResolvedTheme();