Final translator integration and bug fixes

[mhmansoo]

Summary

This PR finishes the translation feature and fixes the remaining issues in both the backend and frontend. The translator service is now fully connected to NodeBB and translated messages display correctly.

Backend Updates

• Connected the translator API at crs-17313-debug-divas-gpu.qatar.cmu.edu:8080.

• Fixed the issue where NodeBB received [object Object] instead of a string.

Testing

Before: non-English messages showed [object Object].
After: German messages are detected correctly and display the proper translated text.

Screenshots included below show the issue before and the correct behavior after.

[aalmuhan]

I checked the branch and the translation flow is working properly now. The [object Object] issue is fully resolved, and the backend returns a clean string instead of a wrapped response. The connection to the GPU translator service is also working as expected.
The UI updates show the translated text immediately, and non-English messages are detected and processed correctly. The frontend changes keep the behavior consistent with the rest of the messaging components.