add ticker page bloc and avatar disk cache

lib/view/pages/ticker/ticker_view.dart

@@ -2,7 +2,6 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:intl/intl.dart';
 
 import '../../../api/marianumconnect/queries/get_ticker/get_ticker_response.dart';
 import '../../../api/marianumconnect/queries/get_ticker_nav/get_ticker_nav_response.dart';
@@ -21,6 +20,7 @@ import '../../../widget/prosemirror/pm_json_view.dart';
 import 'widgets/ticker_content_card.dart';
 import 'widgets/ticker_nav_list.dart';
 import 'widgets/ticker_page_body.dart';
+import 'widgets/ticker_updated_bar.dart';
 
 /// Ticker module entry. Wires the [TickerBloc] to the presentation
 /// [TickerScaffold]; the "Aktuelles" home surface is driven through the loadable
@@ -46,8 +46,6 @@ class TickerView extends StatelessWidget {
             onSelectionChanged: (slug) => bloc.add(
               Emit<TickerState>((state) => state.copyWith(selectedSlug: slug)),
             ),
-            homePublishedAt: data?.ticker?.publishedAt,
-            onRefreshHome: bloc.retry,
             homeBuilder: (context, onLinkTap) =>
                 LoadableStateConsumer<TickerBloc, TickerState>(
                   child: (state, loading) => _TickerHome(
@@ -93,14 +91,6 @@ class TickerScaffold extends StatefulWidget {
   /// it (null = home). Also fired when a stale [initialSlug] is discarded.
   final void Function(String? slug)? onSelectionChanged;
 
-  /// ISO publish timestamp of the current "Aktuelles" post, shown as a dated
-  /// refresh button in the app bar while the home surface is open. Null hides
-  /// the button (no post / no date / on a page, which carries no date).
-  final String? homePublishedAt;
-
-  /// Tapped from the app bar's dated button to reload the ticker.
-  final VoidCallback? onRefreshHome;
-
   const TickerScaffold({
     super.key,
     required this.sections,
@@ -108,8 +98,6 @@ class TickerScaffold extends StatefulWidget {
     this.pageBuilder,
     this.initialSlug,
     this.onSelectionChanged,
-    this.homePublishedAt,
-    this.onRefreshHome,
   });
 
   static const double sidebarBreakpoint = 900;
@@ -326,22 +314,6 @@ class _TickerScaffoldState extends State<TickerScaffold> {
           appBar: AppBar(
             title: Text(slug == null ? 'Ticker' : (_selectedTitle ?? 'Ticker')),
             actions: [
-              // The "Aktuelles" post's date, shown only on the home surface
-              // (pages carry no date). Tapping reloads the ticker.
-              if (slug == null)
-                Builder(
-                  builder: (context) {
-                    final updatedAt = _formatPublishedAt(
-                      context,
-                      widget.homePublishedAt,
-                    );
-                    if (updatedAt == null) return const SizedBox.shrink();
-                    return _UpdatedAtButton(
-                      text: updatedAt,
-                      onTap: widget.onRefreshHome,
-                    );
-                  },
-                ),
               // Always present so "Aktuelles" is a fixed anchor; greyed out
               // (disabled) while it is the current surface.
               IconButton(
@@ -415,8 +387,12 @@ class _TickerHome extends StatelessWidget {
     }
 
     return ListView(
+      physics: const AlwaysScrollableScrollPhysics(),
       padding: const EdgeInsets.only(bottom: AppSpacing.lg),
-      children: [_CurrentTickerCard(ticker: ticker, onLinkTap: onLinkTap)],
+      children: [
+        TickerUpdatedBar(publishedAt: ticker.publishedAt),
+        _CurrentTickerCard(ticker: ticker, onLinkTap: onLinkTap),
+      ],
     );
   }
 }
@@ -440,46 +416,6 @@ class _CurrentTickerCard extends StatelessWidget {
   }
 }
 
-/// App bar button showing when the "Aktuelles" post was last updated; tapping
-/// reloads the ticker. Styled to sit on the app bar (onSurface foreground) with
-/// a clock icon and the full date in a tooltip.
-class _UpdatedAtButton extends StatelessWidget {
-  final String text;
-  final VoidCallback? onTap;
-
-  const _UpdatedAtButton({required this.text, this.onTap});
-
-  @override
-  Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    return Padding(
-      padding: const EdgeInsets.symmetric(horizontal: AppSpacing.xs),
-      child: Tooltip(
-        message: 'Aktualisiert am $text',
-        child: TextButton.icon(
-          onPressed: onTap,
-          icon: const Icon(Icons.schedule, size: 16),
-          label: Text(text),
-          style: TextButton.styleFrom(
-            foregroundColor: theme.colorScheme.onSurface,
-            textStyle: theme.textTheme.labelMedium,
-          ),
-        ),
-      ),
-    );
-  }
-}
-
-/// Formats the ISO `publishedAt` as `dd.MM.yyyy, HH:mm` in the device locale, or
-/// null when it is missing/unparseable so callers can drop the line entirely.
-String? _formatPublishedAt(BuildContext context, String? iso) {
-  if (iso == null || iso.isEmpty) return null;
-  final parsed = DateTime.tryParse(iso);
-  if (parsed == null) return null;
-  final locale = Localizations.localeOf(context).toString();
-  return DateFormat('dd.MM.yyyy, HH:mm', locale).format(parsed.toLocal());
-}
-
 class _UnavailableHint extends StatelessWidget {
   final String webUrl;