refactor badges

lib/widgets/avatar_or_hash.dart

@@ -31,9 +31,8 @@ class AvatarOrHash extends StatelessWidget {
       child: Center(
         child: Badge(
           isLabelVisible: hasBadge,
-          label: SizedBox.shrink(),
-          offset: Offset(8, -8),
-          backgroundColor: Theme.of(context).colorScheme.primary,
+          smallSize: 8,
+          backgroundColor: Theme.of(context).colorScheme.onPrimaryContainer,
           child: ClipRRect(
             borderRadius: BorderRadius.all(Radius.circular(4)),
             child: SizedBox(

lib/widgets/chat_page/room_chat.dart

@@ -60,6 +60,14 @@ class RoomChat extends HookConsumerWidget {
         .watch(CurrentRoomController.provider)
         .betterWhen(
           data: (room) {
+            if (room == null) {
+              return Center(
+                child: Text(
+                  "Nothing to see here...",
+                  style: theme.textTheme.headlineMedium,
+                ),
+              );
+            }
             final controllerProvider = RoomChatController.provider(
               room.roomData,
             );