fix: escape special characters in save_config TOML output

tests/test_config.py

@@ -105,3 +105,11 @@ class TestSaveConfig:
         path = tmp_path / "subdir" / "config.toml"
         save_config(Config(), path)
         assert path.exists()
+
+    def test_save_handles_special_characters_in_microphone(self, tmp_path):
+        from whisper_local.config import save_config
+        path = tmp_path / "config.toml"
+        config = Config(microphone='USB "Pro" Mic')
+        save_config(config, path)
+        loaded = load_config(path)
+        assert loaded.microphone == 'USB "Pro" Mic'

whisper_local/config.py

@@ -63,17 +63,22 @@ def load_config(path: Path = DEFAULT_CONFIG_PATH) -> Config:
     return config
 
 
+def _toml_str(value: str) -> str:
+    """Escaped einen String-Wert für TOML (verhindert ungültiges TOML bei Sonderzeichen)."""
+    return value.replace("\\", "\\\\").replace('"', '\\"')
+
+
 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'[hotkey]\nkey = "{_toml_str(config.hotkey)}"\n\n'
-        f'[whisper]\nmodel = "{config.whisper_model}"\n'
+        f'[whisper]\nmodel = "{_toml_str(config.whisper_model)}"\n'
-        f'language = "{config.language}"\n'
+        f'language = "{_toml_str(config.language)}"\n'
-        f'compute_type = "{config.compute_type}"\n\n'
+        f'compute_type = "{_toml_str(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'
+        f'device = "{_toml_str(config.microphone)}"\n'
     )
     path.write_text(content, encoding="utf-8")