🗣️ fix: get speechTab config; feature: not overriding variables selected by user

[berry-13]

Summary

https://github.com/danny-avila/LibreChat/commit/1797524cf11614593d4920fef64700e572fecfaa

Change Type

Please delete any irrelevant options.

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [x] Refactor

Testing

Checked that the variables were fetched correctly and that were not overriding the user's selected one

Checklist

• [x] My code adheres to this project's style guidelines
• [x] I have performed a self-review of my own code
• [x] I have commented in any complex areas of my code
• [x] I have made pertinent documentation changes
• [x] My changes do not introduce new warnings
• [x] I have written tests demonstrating that my changes are effective or that my feature works
• [x] Local unit tests pass with my changes
• [x] Any changes dependent on mine have been merged and published in downstream modules.
• [x] A pull request for updating the documentation has been submitted.