Try some stuff on room list and avatar...

libraries/matrix/src/main/java/io/element/android/x/matrix/room/RoomSummary.kt

@@ -18,7 +18,7 @@ sealed interface RoomSummary {
 
 data class RoomSummaryDetails(
     val roomId: RoomId,
-    val name: String?,
+    val name: String,
     val isDirect: Boolean,
     val avatarURLString: String?,
     val lastMessage: CharSequence?,

libraries/matrix/src/main/java/io/element/android/x/matrix/room/RoomSummaryDataSource.kt

@@ -123,7 +123,7 @@ internal class RustRoomSummaryDataSource(
         return RoomSummary.Filled(
             details = RoomSummaryDetails(
                 roomId = RoomId(identifier),
-                name = room.name(),
+                name = room.name() ?: identifier,
                 isDirect = room.isDm() ?: false,
                 avatarURLString = room.fullRoom()?.avatarUrl(),
                 unreadNotificationCount = room.unreadNotifications().notificationCount(),