chore: Update Matrix SDK and refactor

lib/pages/chat/chat.dart

@@ -134,15 +134,6 @@ class ChatController extends State<Chat> {
 
   bool showEmojiPicker = false;
 
-  bool get isLeftDMRoom {
-    final room = this.room;
-    final userId = room?.directChatMatrixID;
-    if (room == null || userId == null) return false;
-    return room.isDirectChat &&
-        room.unsafeGetUserFromMemoryOrFallback(userId).membership ==
-            Membership.leave;
-  }
-
   void recreateChat() async {
     final room = this.room;
     final userId = room?.directChatMatrixID;

lib/pages/chat/chat_app_bar_title.dart

@@ -47,7 +47,9 @@ class ChatAppBarTitle extends StatelessWidget {
             tag: 'content_banner',
             child: Avatar(
               mxContent: room.avatar,
-              name: room.displayname,
+              name: room.getLocalizedDisplayname(
+                MatrixLocals(L10n.of(context)!),
+              ),
               size: 32,
             ),
           ),

lib/pages/chat/chat_view.dart

@@ -291,7 +291,8 @@ class ChatView extends StatelessWidget {
                                           Brightness.light
                                       ? Colors.white
                                       : Colors.black,
-                                  child: controller.isLeftDMRoom
+                                  child: controller.room?.isAbandonedDMRoom ==
+                                          true
                                       ? Row(
                                           mainAxisAlignment:
                                               MainAxisAlignment.spaceEvenly,

lib/pages/chat/input_bar.dart

@@ -196,7 +196,7 @@ class InputBar extends StatelessWidget {
           ret.add({
             'type': 'room',
             'mxid': (r.canonicalAlias.isNotEmpty) ? r.canonicalAlias : r.id,
-            'displayname': r.displayname,
+            'displayname': r.getLocalizedDisplayname(),
             'avatar_url': r.avatar?.toString(),
           });
         }