fix: Move to latest null safe sdk

lib/pages/chat.dart

@@ -168,7 +168,7 @@ class ChatController extends State<Chat> {
       timeline = await room.getTimeline(onUpdate: updateView);
       if (timeline.events.isNotEmpty) {
         // ignore: unawaited_futures
-        room.setUnread(false).catchError((err) {
+        room.markUnread(false).catchError((err) {
           if (err is MatrixException && err.errcode == 'M_FORBIDDEN') {
             // ignore if the user is not in the room (still joining)
             return;
@@ -197,10 +197,7 @@ class ChatController extends State<Chat> {
         timeline.events.isNotEmpty &&
         Matrix.of(context).webHasFocus) {
       // ignore: unawaited_futures
-      room.setReadMarker(
-        timeline.events.first.eventId,
-        mRead: timeline.events.first.eventId,
-      );
+      timeline.setReadMarker();
       if (PlatformInfos.isIOS) {
         // Workaround for iOS not clearing notifications with fcm_shared_isolate
         if (!room.client.rooms.any((r) =>

lib/pages/chat_list.dart

@@ -235,7 +235,7 @@ class ChatListController extends State<ChatList> {
     final room = Matrix.of(context).client.getRoomById(selectedRoomIds.single);
     return showFutureLoadingDialog(
       context: context,
-      future: () => room.setUnread(!room.isUnread),
+      future: () => room.markUnread(!room.isUnread),
     );
   }
 

lib/pages/views/chat_list_view.dart

@@ -432,7 +432,7 @@ class _ChatListViewBody extends StatelessWidget {
         return FutureBuilder<void>(
           future: controller.waitForFirstSync(),
           builder: (BuildContext context, snapshot) {
-            if (Matrix.of(context).client.prevBatch != null) {
+            if (snapshot.connectionState == ConnectionState.done) {
               final rooms = Matrix.of(context)
                   .client
                   .rooms

lib/utils/client_manager.dart

@@ -39,7 +39,7 @@ abstract class ClientManager {
     await Future.wait(clients.map((client) => client
         .init(
           waitForFirstSync: false,
-          waitUntilFullLoaded: false,
+          waitUntilLoadCompletedLoaded: false,
         )
         .catchError((e, s) => Logs().e('Unable to initialize client', e, s))));
     if (clients.length > 1 && clients.any((c) => !c.isLogged())) {