Clean up RepAnnouncer: remove TTS code, play pre-generated audio only

- RepAnnouncer now only plays audio files, no TTS generation
- Removed pyttsx3 dependency, rate/volume params from constructor
- Audio generation delegated to app/audio/generate.py (called at startup)
- Default audio dir changed to resources/audio/reps
- Added resources/ to .gitignore

app/core/lifecycle.py

@@ -2,10 +2,18 @@ from __future__ import annotations
 
 from app.diagnostics.crash_handler import enable_crash_handler
 from configs.load import config
-
+from app.audio.generate import generate_rep_audio_files
 
 def startup() -> None:
     """应用启动初始化：开启崩溃日志和日志系统"""
     enable_crash_handler(config.logging.dir_path)
     from app.core.logging import setup_logging
     setup_logging()
+
+    # 生成运动次数语音文件
+    generate_rep_audio_files(
+        max_count=config.audio.rep_max_count,
+        rate=config.audio.rep_announcer_rate,
+        output_dir=config.audio.resolved_audio_dir,
+        overwrite=False,
+    )