Fix runtime NameError (get_api_client) and CI ModuleNotFoundError (absolute imports)

backend/app/api/routes/stt.py

@@ -21,7 +21,7 @@ from ...schemas.stt import (
 )
 from ...core.config import get_settings
 from sqlalchemy.orm import Session
-from ...models import get_db, AudioFile, Transcript
+from app.models import get_db, AudioFile, Transcript
 from ...workers.tasks import process_audio_file
 from celery.result import AsyncResult
 from ...schemas.stt import (

frontend/streamlit_app.py

@@ -5,6 +5,7 @@ Premium Speech-to-Text & Text-to-Speech Interface
 
 import streamlit as st
 from pathlib import Path
+from frontend.services.api_client import get_api_client
 
 # Page configuration - must be first Streamlit command
 st.set_page_config(