chore: Follow up donation button

lib/config/app_config.dart

@@ -36,6 +36,7 @@ abstract class AppConfig {
       'https://github.com/krille-chan/fluffychat/issues';
   static const String changelogUrl =
       'https://github.com/krille-chan/fluffychat/blob/main/CHANGELOG.md';
+  static const String donationUrl = 'https://ko-fi.com/krille';
 
   static const Set<String> defaultReactions = {'👍', '❤️', '😂', '😮', '😢'};
 

lib/pages/chat_list/client_chooser_button.dart

@@ -2,7 +2,9 @@ import 'package:flutter/material.dart';
 
 import 'package:go_router/go_router.dart';
 import 'package:matrix/matrix.dart';
+import 'package:url_launcher/url_launcher_string.dart';
 
+import 'package:fluffychat/config/app_config.dart';
 import 'package:fluffychat/config/themes.dart';
 import 'package:fluffychat/l10n/l10n.dart';
 import 'package:fluffychat/widgets/adaptive_dialogs/show_ok_cancel_alert_dialog.dart';
@@ -67,7 +69,7 @@ class ClientChooserButton extends StatelessWidget {
           ],
         ),
       ),
-      if (Matrix.of(context).backgroundPush?.firebaseEnabled == false)
+      if (Matrix.of(context).backgroundPush?.firebaseEnabled != true)
         PopupMenuItem(
           value: SettingsAction.support,
           child: Row(
@@ -219,7 +221,7 @@ class ClientChooserButton extends StatelessWidget {
           FluffyShare.shareInviteLink(context);
           break;
         case SettingsAction.support:
-          // TODO: Implement me
+          launchUrlString(AppConfig.donationUrl);
           break;
         case SettingsAction.settings:
           context.go('/rooms/settings');