🤖 fix: prevent Escape in image preview from canceling stream

When viewing an image preview (lightbox), pressing Escape should only
close the preview dialog, not also interrupt the active AI stream.

Added stopPropagation() on the Escape keydown event in the DialogContent
to prevent it from bubbling to the global stream interrupt handler.

Author: ibetitsmike

src/browser/components/tools/shared/ToolResultImages.tsx

@@ -118,6 +118,12 @@ export const ToolResultImages: React.FC<ToolResultImagesProps> = ({ result }) =>
       {/* Lightbox modal for full-size image viewing */}
       <Dialog open={selectedImage !== null} onOpenChange={() => setSelectedImage(null)}>
         <DialogContent
+          onKeyDown={(e) => {
+            // Prevent Escape from propagating to global handlers (stream interrupt)
+            if (e.key === "Escape") {
+              e.stopPropagation();
+            }
+          }}
           maxWidth="90vw"
           maxHeight="90vh"
           className="flex items-center justify-center bg-black/90 p-2"