simplified code across the app and consolidated duplicated helpers

lib/view/pages/settings/widgets/privacy_info.dart

@@ -5,11 +5,11 @@ import '../../../../widget/confirm_dialog.dart';
 import '../../../../widget/details_bottom_sheet.dart';
 
 class PrivacyInfo {
-  String providerText;
-  String privacyUrl;
-  String imprintUrl;
+  final String providerText;
+  final String privacyUrl;
+  final String imprintUrl;
 
-  PrivacyInfo({
+  const PrivacyInfo({
     required this.providerText,
     required this.imprintUrl,
     required this.privacyUrl,

lib/view/pages/settings/widgets/push_status_sheet.dart

@@ -228,11 +228,7 @@ class _PushStatusBodyState extends State<_PushStatusBody>
   /// otherwise re-registering IS the primary next step and the test action is
   /// omitted (it could not succeed and the checklist explains why).
   Widget _actions(PushStatusReport report) {
-    const spinner = SizedBox(
-      width: 16,
-      height: 16,
-      child: CircularProgressIndicator(strokeWidth: 2),
-    );
+    const spinner = AppProgressIndicator.small();
     final ready = report.readyForTestNotification;
     return Row(
       crossAxisAlignment: CrossAxisAlignment.start,