feat: add microphone field and save_config to Config

whisper_local/config.py

@@ -25,6 +25,7 @@ class Config:
     sample_rate: int = 16000
     channels: int = 1
     min_duration: float = 0.5
+    microphone: str = ""
 
 
 def load_config(path: Path = DEFAULT_CONFIG_PATH) -> Config:
@@ -56,5 +57,23 @@ def load_config(path: Path = DEFAULT_CONFIG_PATH) -> Config:
         config.channels = audio_section["channels"]
     if "min_duration" in audio_section:
         config.min_duration = audio_section["min_duration"]
+    if "device" in audio_section:
+        config.microphone = audio_section["device"]
 
     return config
+
+
+def save_config(config: Config, path: Path = DEFAULT_CONFIG_PATH) -> None:
+    """Schreibt Config als TOML-Datei. Erstellt Verzeichnisse bei Bedarf."""
+    path.parent.mkdir(parents=True, exist_ok=True)
+    content = (
+        f'[hotkey]\nkey = "{config.hotkey}"\n\n'
+        f'[whisper]\nmodel = "{config.whisper_model}"\n'
+        f'language = "{config.language}"\n'
+        f'compute_type = "{config.compute_type}"\n\n'
+        f'[audio]\nsample_rate = {config.sample_rate}\n'
+        f'channels = {config.channels}\n'
+        f'min_duration = {config.min_duration}\n'
+        f'device = "{config.microphone}"\n'
+    )
+    path.write_text(content, encoding="utf-8")