⬇️ fix: Image Download Browser Compatibility (#7950)

* fix: Add null check for SelectedTTS in MessageAudio component to prevent rendering issues

* fix: image download browser compatibility with error handling and fallback mechanism

- Updated the downloadImage function to use fetch for improved reliability and added error handling.
- Implemented a fallback to the original download method in case of fetch failure.
- Ensured the download link uses a blob URL for better compatibility with various image types.

client/src/components/Chat/Messages/MessageAudio.tsx

@@ -14,6 +14,9 @@ function MessageAudio(props: TMessageAudio) {
   };
 
   const SelectedTTS = TTSComponents[engineTTS];
+  if (!SelectedTTS) {
+    return null;
+  }
   return <SelectedTTS {...props} />;
 }