implemented a guided notification permission flow triggered on the first Talk visit

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

@@ -1,3 +1,6 @@
+import 'dart:async';
+
+import 'package:app_settings/app_settings.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 
@@ -42,16 +45,41 @@ class _PushStatusBody extends StatefulWidget {
   State<_PushStatusBody> createState() => _PushStatusBodyState();
 }
 
-class _PushStatusBodyState extends State<_PushStatusBody> {
+class _PushStatusBodyState extends State<_PushStatusBody>
+    with WidgetsBindingObserver {
   PushStatusReport? _report;
   bool _busy = false;
 
+  /// Set while the user is in the OS settings — the next `resumed` lifecycle
+  /// event then re-collects the status so a just-changed permission shows up.
+  bool _reloadOnResume = false;
+
   @override
   void initState() {
     super.initState();
+    WidgetsBinding.instance.addObserver(this);
     _load();
   }
 
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.dispose();
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed && _reloadOnResume) {
+      _reloadOnResume = false;
+      unawaited(_load());
+    }
+  }
+
+  Future<void> _openNotificationSettings() async {
+    _reloadOnResume = true;
+    await AppSettings.openAppSettings(type: AppSettingsType.notification);
+  }
+
   Future<void> _load() async {
     final capabilitiesState = widget.capabilities.state;
     final report = await collectPushStatus(
@@ -117,14 +145,24 @@ class _PushStatusBodyState extends State<_PushStatusBody> {
       mainAxisSize: MainAxisSize.min,
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        ...rows.map(
-          (row) => ListTile(
+        ...rows.map((row) {
+          // Offer the OS-settings shortcut on the permission row whenever it
+          // isn't granted — after a denial that's the only place to fix it.
+          final canOpenSettings =
+              row.opensNotificationSettings && row.state != PushCheck.ok;
+          return ListTile(
             dense: true,
             leading: _stateIcon(row.state, theme),
             title: Text(row.label),
             subtitle: row.detail == null ? null : Text(row.detail!),
-          ),
-        ),
+            trailing: canOpenSettings
+                ? TextButton(
+                    onPressed: _openNotificationSettings,
+                    child: const Text('Einstellungen'),
+                  )
+                : null,
+          );
+        }),
         if (report.general.lastRegistrationAt != null ||
             report.talk.lastRegistrationAt != null)
           const Divider(height: 1),