refactor as gradio server

Update app.py

set arg voice_id for TTS

update TTS to generate speech

Update app.py

Update app.py

corrected mistral ai client import

fixed bug to TTS generated output

replaced client:httpx.AsyncClient() with Mistral() for end sentence

swithched httpx.AsyncClient() to Mistral() in streamreply

Update app.py

Update app.py

use mistral sdk fot TTS

Update app.py

Create app.py