Fix desktop WebSocket certificate verification

desktop-client/main.py

@@ -55,6 +55,7 @@ class VlcSyncApp(QMainWindow):
         self.sync_client.connected.connect(lambda: self.room_widget.update_connection_status(True))
         self.sync_client.disconnected.connect(self.on_ws_disconnected)
         self.sync_client.disconnected.connect(lambda: self.room_widget.update_connection_status(False))
+        self.sync_client.connection_error.connect(self.on_connection_error)
         self.sync_client.room_joined.connect(self.on_room_joined)
         self.sync_client.room_rejoined.connect(self.on_room_rejoined)
         self.sync_client.room_error.connect(self.on_room_error)
@@ -135,6 +136,12 @@ class VlcSyncApp(QMainWindow):
             self.lobby_widget.reset_ui()
             self.pending_connect_action = None
 
+    def on_connection_error(self, msg: str):
+        QMessageBox.critical(self, "Secure Connection Error", msg)
+        self.pending_connect_action = None
+        self.lobby_widget.reset_ui()
+        self.sync_client.stop()
+
     def on_room_error(self, msg: str):
         QMessageBox.critical(self, "Room Error", msg)
         self.lobby_widget.reset_ui()
@@ -493,4 +500,3 @@ if __name__ == "__main__":
     window = VlcSyncApp()
     window.show()
     sys.exit(app.exec())
-