fix(suspend): restart keyboard shortcut backend after resume (#371)

After suspend/resume, evdev devices disconnect and the monitor thread
exits when all file descriptors close. The resume handler only
reinitialized the speech engine, leaving keyboard shortcuts dead.

Restart _setup_keyboard_shortcuts() in _reinit_after_resume() to
re-scan /dev/input and open fresh device file descriptors.

src/vocalinux/ui/tray_indicator.py

@@ -476,6 +476,15 @@ class TrayIndicator:
             self.speech_engine.reinitialize_after_resume()
         except Exception:
             logger.error("Failed to reinitialize after resume", exc_info=True)
+
+        # evdev devices disconnect on suspend; monitor thread exits when all fds close.
+        # Full stop+start re-scans /dev/input and opens fresh file descriptors.
+        try:
+            logger.info("Restarting keyboard shortcuts after resume")
+            self._setup_keyboard_shortcuts()
+        except Exception:
+            logger.error("Failed to restart keyboard shortcuts after resume", exc_info=True)
+
         return GLib.SOURCE_REMOVE
 
     def _on_quit_clicked(self, widget):

tests/test_suspend_handler.py

@@ -272,5 +272,58 @@ class TestReinitializeAfterResume(unittest.TestCase):
         mgr._update_state.assert_called_once_with(RecognitionState.ERROR)
 
 
+class TestTrayIndicatorResumeFlow(unittest.TestCase):
+    """Tests for TrayIndicator._reinit_after_resume keyboard restart."""
+
+    def _make_tray_indicator(self):
+        from vocalinux.ui.tray_indicator import TrayIndicator
+
+        with patch.object(TrayIndicator, "__init__", lambda self: None):
+            indicator = TrayIndicator.__new__(TrayIndicator)
+
+        indicator.speech_engine = MagicMock()
+        indicator._setup_keyboard_shortcuts = MagicMock()
+        return indicator
+
+    def test_reinit_after_resume_calls_speech_engine_reinit(self):
+        indicator = self._make_tray_indicator()
+
+        indicator._reinit_after_resume()
+
+        indicator.speech_engine.reinitialize_after_resume.assert_called_once()
+
+    def test_reinit_after_resume_restarts_keyboard_shortcuts(self):
+        indicator = self._make_tray_indicator()
+
+        indicator._reinit_after_resume()
+
+        indicator._setup_keyboard_shortcuts.assert_called_once()
+
+    def test_keyboard_restart_happens_even_if_speech_reinit_fails(self):
+        indicator = self._make_tray_indicator()
+        indicator.speech_engine.reinitialize_after_resume.side_effect = RuntimeError("boom")
+
+        indicator._reinit_after_resume()
+
+        indicator._setup_keyboard_shortcuts.assert_called_once()
+
+    def test_keyboard_restart_failure_does_not_crash(self):
+        indicator = self._make_tray_indicator()
+        indicator._setup_keyboard_shortcuts.side_effect = RuntimeError("no devices")
+
+        indicator._reinit_after_resume()
+
+        indicator.speech_engine.reinitialize_after_resume.assert_called_once()
+
+    def test_returns_source_remove(self):
+        from gi.repository import GLib
+
+        indicator = self._make_tray_indicator()
+
+        result = indicator._reinit_after_resume()
+
+        assert result == GLib.SOURCE_REMOVE
+
+
 if __name__ == "__main__":
     unittest.main()