fix(evdev): Resource-Leak und Handling unbekannter Keycodes

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

tests/test_tray.py

@@ -375,3 +375,41 @@ class TestRecordHotkeyEvdev:
             record_hotkey(lambda n, c: results.append((n, c)), cancel)
 
         assert results == [("KEY_F12", False)]
+
+    def test_skips_unknown_keycodes(self):
+        import threading
+        from unittest.mock import MagicMock, patch
+
+        unknown_event = MagicMock()
+        unknown_event.type = 1  # EV_KEY
+        unknown_event.code = 9999  # unbekannter Keycode
+        unknown_event.value = 1  # Keydown
+
+        known_event = MagicMock()
+        known_event.type = 1  # EV_KEY
+        known_event.code = 88  # KEY_F12
+        known_event.value = 1  # Keydown
+
+        fake_device = MagicMock()
+        fake_device.fd = 42
+        fake_device.read.return_value = iter([unknown_event, known_event])
+        fake_device.close = MagicMock()
+
+        cancel = threading.Event()
+        results: list[tuple[str, bool]] = []
+
+        with patch(
+            "whisper_local.tray._hotkey_record_evdev.find_all_keyboards",
+            return_value=[fake_device],
+        ), patch(
+            "whisper_local.tray._hotkey_record_evdev.selectors.DefaultSelector"
+        ) as mock_sel_cls:
+            mock_sel = MagicMock()
+            mock_sel_cls.return_value = mock_sel
+            sel_key = MagicMock()
+            sel_key.data = fake_device
+            mock_sel.select.return_value = [(sel_key, None)]
+            from whisper_local.tray._hotkey_record_evdev import record_hotkey
+            record_hotkey(lambda n, c: results.append((n, c)), cancel)
+
+        assert results == [("KEY_F12", False)]