Refactor TTS module: rename `tts_manager` to `manager` for consistency across imports and structure.

src/VoiceDialogue/services/audio/audio_generator/__init__.py

@@ -18,7 +18,7 @@ from .runtime import (
     TTSInterface,
     TTSFactory
 )
-from .tts_manager import (
+from .manager import (
     TTSManager,
     TTSRegistryTables,
     tts_manager,

src/VoiceDialogue/services/audio/audio_generator/runtime/moyoyo.py

@@ -6,7 +6,7 @@ import numpy as np
 from config.paths import load_third_party
 from .interface import TTSInterface
 from ..models.moyoyo import MoYoYoTTSConfig
-from ..tts_manager import tts_tables
+from ..manager import tts_tables
 
 load_third_party()