fix: Follow up for spaces hierarchy

- fix endless spinner
- fix rooms shon twice
- fix spaces accidentally opened as rooms
- add missing spaces header to spaces view

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

lib/main.dart

@@ -22,6 +22,7 @@ import 'config/themes.dart';
 import 'utils/background_push.dart';
 import 'utils/custom_scroll_behaviour.dart';
 import 'utils/localized_exception_extension.dart';
+import 'utils/space_navigator.dart';
 import 'widgets/lock_screen.dart';
 import 'widgets/matrix.dart';
 
@@ -132,6 +133,9 @@ class _FluffyChatAppState extends State<FluffyChatApp> {
                     localizationsDelegates: const [
                       ...L10n.localizationsDelegates,
                     ],
+                    navigatorObservers: [
+                      SpaceNavigator.routeObserver,
+                    ],
                     supportedLocales: L10n.supportedLocales,
                     initialUrl: _initialUrl ?? '/',
                     routes: AppRoutes(columnMode ?? false).routes,