Switch to google-genai package and fix TTS config building

requirements.txt

@@ -5,7 +5,7 @@ scikit-learn>=1.3.0
 faiss-cpu>=1.7.4
 plotly>=5.15.0
 folium>=0.14.0
-google-generativeai==0.8.5
+google-genai==0.8.5
 openai>=1.0.0
 anthropic>=0.21.3
 langchain-core>=0.1.0

tts_provider.py

@@ -119,7 +119,7 @@ def generate_tts(text: str, speaker_voice_configs=None, model: str = 'models/gem
         if speaker_voice_configs and len(speaker_voice_configs) > 0:
             logger.info(f'Building multi-speaker config for {len(speaker_voice_configs)} speakers')
             # Add speech config for multi-speaker TTS
-            if types is not None:
+            if types is not None and hasattr(types, 'SpeakerVoiceConfig') and hasattr(types, 'VoiceConfig') and hasattr(types, 'PrebuiltVoiceConfig') and hasattr(types, 'SpeechConfig') and hasattr(types, 'MultiSpeakerVoiceConfig'):
                 logger.info('Using typed objects for speech config')
                 # Use typed objects if available
                 speaker_configs = []
@@ -141,7 +141,7 @@ def generate_tts(text: str, speaker_voice_configs=None, model: str = 'models/gem
                     )
                 )
             else:
-                logger.warning('Types module not available, using dict fallback')
+                logger.warning('Types module not available or missing TTS types, using dict fallback')
                 # Fallback to dict structure if types not available
                 config['speech_config'] = {
                     'multi_speaker_voice_config': {