refactor: Upgrade to Flutter 2.5

lib/config/themes.dart

@@ -107,13 +107,11 @@ abstract class FluffyThemes {
     ),
     appBarTheme: AppBarTheme(
       elevation: 2,
-      brightness: Brightness.light,
+      systemOverlayStyle: SystemUiOverlayStyle.dark,
       color: Colors.white,
-      textTheme: TextTheme(
-        headline6: TextStyle(
-          color: Colors.black,
-          fontSize: 20,
-        ),
+      titleTextStyle: TextStyle(
+        color: Colors.black,
+        fontSize: 20,
       ),
       iconTheme: IconThemeData(color: Colors.black),
     ),
@@ -197,13 +195,11 @@ abstract class FluffyThemes {
     snackBarTheme: SnackBarThemeData(behavior: SnackBarBehavior.floating),
     appBarTheme: AppBarTheme(
       elevation: 2,
-      brightness: Brightness.dark,
+      systemOverlayStyle: SystemUiOverlayStyle.light,
       color: Color(0xff1D1D1D),
-      textTheme: TextTheme(
-        headline6: TextStyle(
-          color: Colors.white,
-          fontSize: 20,
-        ),
+      titleTextStyle: TextStyle(
+        color: Colors.white,
+        fontSize: 20,
       ),
       iconTheme: IconThemeData(color: Colors.white),
     ),

lib/pages/views/chat_details_view.dart

@@ -79,10 +79,10 @@ class ChatDetailsView extends StatelessWidget {
                       style: TextStyle(
                           color: Theme.of(context)
                               .appBarTheme
-                              .textTheme
-                              .headline6
+                              .titleTextStyle
                               .color)),
-                  backgroundColor: Theme.of(context).appBarTheme.color,
+                  backgroundColor:
+                      Theme.of(context).appBarTheme.backgroundColor,
                   flexibleSpace: FlexibleSpaceBar(
                     background: ContentBanner(room.avatar,
                         onEdit: room.canSendEvent('m.room.avatar')

lib/pages/views/settings_view.dart

@@ -25,7 +25,7 @@ class SettingsView extends StatelessWidget {
             floating: true,
             pinned: true,
             title: Text(L10n.of(context).settings),
-            backgroundColor: Theme.of(context).appBarTheme.color,
+            backgroundColor: Theme.of(context).appBarTheme.backgroundColor,
             flexibleSpace: FlexibleSpaceBar(
               background: ContentBanner(
                 controller.profile?.avatarUrl,

lib/widgets/list_items/chat_list_item.dart

@@ -150,7 +150,7 @@ class ChatListItem extends StatelessWidget {
         room.lastEvent?.senderId == Matrix.of(context).client.userID;
     final unread = room.isUnread || room.membership == Membership.invite;
     final unreadBubbleSize = unread
-        ? room.notificationCount > 0.0
+        ? room.notificationCount > 0
             ? 20.0
             : 14.0
         : 0.0;