fix: google stt was not available

src/ui/step1_upload.py

@@ -31,9 +31,6 @@ def get_video_duration(video_path: str) -> float:
 def setup_google_credentials():
     if "GOOGLE_JSON_CREDENTIALS" not in os.environ:
         return False
-    if "GOOGLE_APPLICATION_CREDENTIALS" in os.environ:
-        # already configured
-        return True
     with tempfile.NamedTemporaryFile(mode="w", delete=False, suffix=".json", encoding="utf-8", dir=get_session_dir()) as temp_file:
         temp_file.write(os.environ["GOOGLE_JSON_CREDENTIALS"])
         os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = temp_file.name
@@ -55,6 +52,8 @@ def get_transcriber_instance(language_key: str):
         st.session_state.transcriber_used = "Google Speech-to-Text V1"
         return transcriber
     except Exception as e:
+        import traceback
+        traceback.print_exc()
         st.warning("Google Speech-to-Text not available, falling back to Whisper. Processing may be slower.")
         st.session_state.transcriber_used = "Whisper (base model)"
         return WhisperAudioTranscriber(model_size="base", language=whisper_lang_code)