feat: add config module with TOML loading and defaults

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

whisper_local/config.py

@@ -0,0 +1,52 @@
+"""Konfiguration aus TOML-Datei mit sinnvollen Defaults."""
+
+from dataclasses import dataclass
+from pathlib import Path
+import tomllib
+
+
+DEFAULT_CONFIG_PATH = Path.home() / ".config" / "whisper-local" / "config.toml"
+
+
+@dataclass
+class Config:
+    hotkey: str = "KEY_F12"
+    whisper_model: str = "small"
+    language: str = "de"
+    compute_type: str = "int8"
+    sample_rate: int = 16000
+    channels: int = 1
+    min_duration: float = 0.5
+
+
+def load_config(path: Path = DEFAULT_CONFIG_PATH) -> Config:
+    """Lädt Config aus TOML-Datei. Gibt Defaults zurück wenn Datei fehlt."""
+    config = Config()
+
+    if not path.exists():
+        return config
+
+    with open(path, "rb") as f:
+        data = tomllib.load(f)
+
+    hotkey_section = data.get("hotkey", {})
+    if "key" in hotkey_section:
+        config.hotkey = hotkey_section["key"]
+
+    whisper_section = data.get("whisper", {})
+    if "model" in whisper_section:
+        config.whisper_model = whisper_section["model"]
+    if "language" in whisper_section:
+        config.language = whisper_section["language"]
+    if "compute_type" in whisper_section:
+        config.compute_type = whisper_section["compute_type"]
+
+    audio_section = data.get("audio", {})
+    if "sample_rate" in audio_section:
+        config.sample_rate = audio_section["sample_rate"]
+    if "channels" in audio_section:
+        config.channels = audio_section["channels"]
+    if "min_duration" in audio_section:
+        config.min_duration = audio_section["min_duration"]
+
+    return config