use AppProgressIndicator for plain loading spinners

lib/view/pages/marianum_message/marianum_message_view.dart

@@ -5,6 +5,7 @@ import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
 import 'package:url_launcher/url_launcher.dart';
 
 import '../../../api/marianumconnect/queries/get_newsletter_file/get_newsletter_file.dart';
+import '../../../widget/app_progress_indicator.dart';
 import '../../../widget/confirm_dialog.dart';
 import '../../../widget/placeholder_view.dart';
 
@@ -33,7 +34,7 @@ class _MessageViewState extends State<MessageView> {
           );
         }
         if (!snapshot.hasData) {
-          return const Center(child: CircularProgressIndicator());
+          return const Center(child: AppProgressIndicator.large());
         }
         return SfPdfViewer.memory(
           snapshot.data!,

lib/view/pages/share_intent/share_chat_picker.dart

@@ -19,6 +19,7 @@ import '../../../state/app/infrastructure/loadable_state/view/loadable_state_con
 import '../../../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
 import '../../../state/app/modules/chat_list/bloc/chat_list_state.dart';
 import '../../../state/app/modules/settings/bloc/settings_cubit.dart';
+import '../../../widget/app_progress_indicator.dart';
 import '../../../widget/info_dialog.dart';
 import '../../../widget/placeholder_view.dart';
 import '../files/files_upload_dialog.dart';
@@ -275,6 +276,6 @@ Future<void> _showBlockingSpinner(BuildContext context) => showDialog<void>(
   barrierDismissible: false,
   builder: (_) => const PopScope(
     canPop: false,
-    child: Center(child: CircularProgressIndicator()),
+    child: Center(child: AppProgressIndicator.large()),
   ),
 );

lib/view/pages/ticker/widgets/ticker_page_body.dart

@@ -14,6 +14,7 @@ import '../../../../state/app/modules/ticker/bloc/ticker_page_bloc.dart';
 import '../../../../state/app/modules/ticker/bloc/ticker_page_state.dart';
 import '../../../../state/app/modules/ticker/repository/ticker_page_repository.dart';
 import '../../../../theming/app_theme.dart';
+import '../../../../widget/app_progress_indicator.dart';
 import '../../../../widget/placeholder_view.dart';
 import '../../../../widget/prosemirror/pm_json_view.dart';
 import 'ticker_content_card.dart';
@@ -89,7 +90,7 @@ class _TickerPageContentState extends State<_TickerPageContent> {
             widget.onRedirect?.call();
           });
         }
-        return const Center(child: CircularProgressIndicator());
+        return const Center(child: AppProgressIndicator.large());
       case TickerPageKind.proxiedFile:
         return Column(
           children: [
@@ -159,7 +160,7 @@ class _ProxiedFileViewState extends State<_ProxiedFileView> {
     future: _bytes,
     builder: (context, snapshot) {
       if (snapshot.connectionState != ConnectionState.done) {
-        return const Center(child: CircularProgressIndicator());
+        return const Center(child: AppProgressIndicator.large());
       }
       final error = snapshot.error;
       if (error != null) {

lib/widget/debug/cache_view.dart

@@ -7,6 +7,7 @@ import 'package:localstore/localstore.dart';
 
 import '../../../widget/placeholder_view.dart';
 import '../../api/request_cache.dart';
+import '../app_progress_indicator.dart';
 import 'json_viewer.dart';
 
 class CacheView extends StatefulWidget {
@@ -71,7 +72,7 @@ class _CacheViewState extends State<CacheView> {
             },
           );
         } else if (snapshot.connectionState != ConnectionState.done) {
-          return const Center(child: CircularProgressIndicator());
+          return const Center(child: AppProgressIndicator.large());
         } else {
           return const Center(
             child: PlaceholderView(

lib/widget/prosemirror/pm_json_view.dart

@@ -2,6 +2,7 @@ import 'package:cached_network_image/cached_network_image.dart';
 import 'package:collection/collection.dart';
 import 'package:flutter/material.dart';
 
+import '../app_progress_indicator.dart';
 import 'pm_document_view.dart';
 import 'pm_node.dart';
 
@@ -116,7 +117,7 @@ class _PmJsonViewState extends State<PmJsonView> {
     if (shown == null) {
       return const SizedBox(
         height: 160,
-        child: Center(child: CircularProgressIndicator()),
+        child: Center(child: AppProgressIndicator.large()),
       );
     }
     return PmDocumentView(doc: shown, onLinkTap: widget.onLinkTap);