feat: add Win32TrayApp and NoOpTray with state management

whisper_local/tray/_tray.py

@@ -1,9 +1,62 @@
 """Tray-App und App-Zustände für whisper-local (Windows)."""
 
 import enum
+import threading
+from typing import Callable
 
 
 class AppState(enum.Enum):
     WAITING = "waiting"
     RECORDING = "recording"
     TRANSCRIBING = "transcribing"
+
+
+class Win32TrayApp:
+    """Tray-Icon via pystray für Windows."""
+
+    def __init__(self, on_settings: Callable[[], None], on_quit: Callable[[], None]):
+        self._on_settings = on_settings
+        self._on_quit = on_quit
+        self._icon = None
+
+    def start(self) -> None:
+        """Startet pystray in einem Daemon-Thread."""
+        import pystray
+        from whisper_local.tray._icon import create_icon
+
+        menu = pystray.Menu(
+            pystray.MenuItem("Einstellungen", self._menu_settings),
+            pystray.MenuItem("Beenden", self._menu_quit),
+        )
+        self._icon = pystray.Icon(
+            "whisper-local",
+            create_icon(AppState.WAITING),
+            "whisper-local",
+            menu,
+        )
+        thread = threading.Thread(target=self._icon.run, daemon=True)
+        thread.start()
+
+    def set_state(self, state: AppState) -> None:
+        """Tauscht das Icon aus (thread-sicher)."""
+        if self._icon is not None:
+            from whisper_local.tray._icon import create_icon
+            self._icon.icon = create_icon(state)
+
+    def _menu_settings(self, icon, item) -> None:
+        self._on_settings()
+
+    def _menu_quit(self, icon, item) -> None:
+        if self._icon is not None:
+            self._icon.stop()
+        self._on_quit()
+
+
+class NoOpTray:
+    """Platzhalter-Implementierung für nicht-Windows-Plattformen."""
+
+    def start(self) -> None:
+        pass
+
+    def set_state(self, state: AppState) -> None:
+        pass