Fix tray visibility and message reception issues

- Disable sound initialization to prevent hanging
- Add missing import re in utils.py
- Fix settings loading for QSettings
- Update file paths to use PROJECT_ROOT
- Revert to working API paths and listener from commit efdc63e

gotify_tray/gui/MainApplication.py

@@ -65,12 +65,7 @@ class MainApplication(QtWidgets.QApplication):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         # Initialize notification sound effect
-        self.notification_sound = QSoundEffect()
-        sound_path = os.path.join(
-            os.path.dirname(__file__), "images", "notification.wav"
-        )
-        self.notification_sound.setSource(QtCore.QUrl.fromLocalFile(sound_path))
-        self.notification_sound.setVolume(0.5)  # Set volume (0.0 to 1.0)
+        self.notification_sound = None  # Disabled to prevent hanging
         self.persistent_notifications = []
         self.next_y_offset = 0
 
@@ -352,9 +347,9 @@ class MainApplication(QtWidgets.QApplication):
             not settings.value("tray/notifications/sound_only_priority10", type=bool)
             or message.priority == 10
         ):
-            if self.notification_sound.isLoaded():
+            if self.notification_sound and self.notification_sound.isLoaded():
                 self.notification_sound.play()
-            else:
+            elif self.notification_sound:
                 # Try to play anyway (QSoundEffect will queue if not loaded yet)
                 self.notification_sound.play()
 
@@ -459,10 +454,9 @@ class MainApplication(QtWidgets.QApplication):
         self.main_window.hidden.connect(self.main_window_hidden_callback)
         self.main_window.activated.connect(self.tray.revert_icon)
 
-        if hasattr(self.styleHints(), "colorSchemeChanged"):
-            self.styleHints().colorSchemeChanged.connect(
-                self.theme_change_requested_callback
-            )
+        self.styleHints().colorSchemeChanged.connect(
+            self.theme_change_requested_callback
+        )
 
         self.messages_model.rowsInserted.connect(
             self.main_window.display_message_widgets