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/utils/space_navigator.dart

@@ -0,0 +1,23 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+
+/// this is a workaround to allow navigation of spaces out from any widget.
+/// Reason is that we have no reliable way to listen on *query* changes of
+/// VRouter.
+///
+/// Time wasted: 3h
+abstract class SpaceNavigator {
+  const SpaceNavigator._();
+
+  // TODO(TheOneWithTheBraid): adjust routing table in order to represent spaces
+  // ... in any present path
+  static final routeObserver = RouteObserver();
+
+  static final StreamController<String?> _controller =
+      StreamController.broadcast();
+
+  static Stream<String?> get stream => _controller.stream;
+
+  static void navigateToSpace(String? spaceId) => _controller.add(spaceId);
+}

lib/utils/url_launcher.dart

@@ -10,6 +10,7 @@ import 'package:url_launcher/url_launcher.dart';
 import 'package:vrouter/vrouter.dart';
 
 import 'package:fluffychat/config/app_config.dart';
+import 'package:fluffychat/utils/space_navigator.dart';
 import 'package:fluffychat/widgets/matrix.dart';
 import 'package:fluffychat/widgets/profile_bottom_sheet.dart';
 import 'package:fluffychat/widgets/public_room_bottom_sheet.dart';
@@ -18,6 +19,7 @@ import 'platform_infos.dart';
 class UrlLauncher {
   final String? url;
   final BuildContext context;
+
   const UrlLauncher(this.context, this.url);
 
   void launchUrl() {
@@ -130,6 +132,11 @@ class UrlLauncher {
       }
       servers.addAll(identityParts.via);
       if (room != null) {
+        if (room.isSpace) {
+          SpaceNavigator.navigateToSpace(room.id);
+          VRouter.of(context).toSegments(['rooms']);
+          return;
+        }
         // we have the room, so....just open it
         if (event != null) {
           VRouter.of(context).toSegments(['rooms', room.id],