fix: skip rendering img element when src is empty in image preview dialog

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/ui/image-preview-dialog.tsx

@@ -42,13 +42,15 @@ function ImagePreviewDialog({
           >
             <X className="h-5 w-5" />
           </button>
-          {/* eslint-disable-next-line @next/next/no-img-element */}
-          <img
-            src={src}
-            alt={alt}
-            onClick={(e) => e.stopPropagation()}
-            className="max-h-[90vh] max-w-[90vw] rounded-lg object-contain"
-          />
+          {src && (
+            /* eslint-disable-next-line @next/next/no-img-element */
+            <img
+              src={src}
+              alt={alt}
+              onClick={(e) => e.stopPropagation()}
+              className="max-h-[90vh] max-w-[90vw] rounded-lg object-contain"
+            />
+          )}
         </DialogPrimitive.Content>
       </DialogPrimitive.Portal>
     </DialogPrimitive.Root>