feat: auto-load images when ItemForm opens with existing URL

src/lib/components/wishlist/ItemForm.svelte

@@ -100,6 +100,13 @@
       onColorChange?.(item.id, color || '');
     }
   }
+
+  // Auto-load images when form opens with existing URL
+  $effect(() => {
+    if (linkUrl && linkUrl.startsWith('http')) {
+      scrapeImages(linkUrl);
+    }
+  });
 </script>
 
 <Card style={cardStyle} class="relative overflow-hidden">