feat: mural feed com criador, descricao e contador de inscritos

lib/pages/chat_list/tabs/murals_tab.dart

@@ -3,11 +3,13 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
+import 'dart:async';
+
 import 'package:material_ui/material_ui.dart';
 import 'package:matrix/matrix.dart';
 import 'package:tatchat/l10n/l10n.dart';
 import 'package:tatchat/pages/chat_list/chat_list.dart';
-import 'package:tatchat/pages/chat_list/chat_list_item.dart';
+import 'package:tatchat/pages/chat_list/mural_list_item.dart';
 import 'package:tatchat/pages/chat_list/tabs/chat_tab_header.dart';
 import 'package:tatchat/pages/chat_list/tabs/empty_tab_view.dart';
 import 'package:tatchat/pages/chat_list/tabs/home_tab.dart';
@@ -28,6 +30,7 @@ class MuralsTab extends StatefulWidget {
 class _MuralsTabState extends State<MuralsTab> {
   final TextEditingController _searchController = TextEditingController();
   final FocusNode _searchFocusNode = FocusNode();
+  final Set<String> _loadingRooms = {};
   bool _isSearchMode = false;
 
   @override
@@ -37,6 +40,25 @@ class _MuralsTabState extends State<MuralsTab> {
     super.dispose();
   }
 
+  /// Loads the missing state events (e.g. `m.room.topic` and `m.room.create`)
+  /// of a mural room so that its description and creator are already visible in
+  /// the list without having to open the mural first.
+  Future<void> _loadMissingRoomState(Room room) async {
+    final roomId = room.id;
+    try {
+      final stateEvents = await room.client.getRoomState(roomId);
+      for (final state in stateEvents) {
+        room.setState(StrippedStateEvent.fromJson(state.toJson()));
+      }
+      if (!mounted) return;
+      setState(() {});
+    } catch (_) {
+      // State loading is best-effort, ignore failures (e.g. offline).
+    } finally {
+      _loadingRooms.remove(roomId);
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final client = Matrix.of(context).client;
@@ -91,15 +113,23 @@ class _MuralsTabState extends State<MuralsTab> {
                     itemCount: murals.length,
                     itemBuilder: (context, i) {
                       final room = murals[i];
+                      final roomId = room.id;
+                      if ((room.topic.isEmpty || room.creatorUserIds.isEmpty) &&
+                          !_loadingRooms.contains(roomId)) {
+                        _loadingRooms.add(roomId);
+                        unawaited(_loadMissingRoomState(room));
+                      }
                       final creatorId = room.creatorUserIds.isEmpty
                           ? null
                           : room.creatorUserIds.first;
                       final creatorState = creatorId == null
                           ? null
                           : room.getState(EventTypes.RoomMember, creatorId);
-                      return ChatListItem(
+                      final creatorDisplayName = creatorState?.content
+                          .tryGet<String>('displayname');
+                      return MuralListItem(
                         room,
-                        key: Key('mural_list_item_${room.id}'),
+                        key: Key('mural_list_item_$roomId'),
                         onTap: () => widget.controller.onChatTap(room),
                         onLongPress: (context) =>
                             widget.controller.chatContextAction(room, context),
@@ -108,9 +138,9 @@ class _MuralsTabState extends State<MuralsTab> {
                           creatorState?.content.tryGet<String>('avatar_url') ??
                               '',
                         ),
-                        displayAvatarName: creatorState?.content.tryGet<String>(
-                          'displayname',
-                        ),
+                        displayAvatarName: creatorDisplayName,
+                        creatorName: creatorDisplayName ?? creatorId,
+                        description: room.topic,
                       );
                     },
                   ),