simplified code across the app and consolidated duplicated helpers

lib/view/pages/share_intent/share_chat_picker.dart

@@ -67,7 +67,12 @@ class ShareChatPicker extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final talkSettings = context.watch<SettingsCubit>().val().talkSettings;
+    final (favoritesToTop, unreadToTop) = context.select(
+      (SettingsCubit c) => (
+        c.state.talkSettings.sortFavoritesToTop,
+        c.state.talkSettings.sortUnreadToTop,
+      ),
+    );
     return Scaffold(
       appBar: AppBar(
         title: const Text('Talk-Chat auswählen'),
@@ -100,8 +105,8 @@ class ShareChatPicker extends StatelessWidget {
           if (rooms == null) return const SizedBox.shrink();
           final sorted = rooms
               .sortBy(
-                favoritesToTop: talkSettings.sortFavoritesToTop,
-                unreadToTop: talkSettings.sortUnreadToTop,
+                favoritesToTop: favoritesToTop,
+                unreadToTop: unreadToTop,
               )
               // Hide chats the user can't write to (announcement channels,
               // archived rooms, …) — uploading there would only fail at the
@@ -195,8 +200,8 @@ Future<void> _runShareFlow(
   try {
     await action();
   } catch (e) {
-    if (context.mounted) Navigator.of(context).pop();
     if (context.mounted) {
+      Navigator.of(context).pop();
       InfoDialog.show(
         context,
         errorToUserMessage(e),