fixed overwrite on internal copy, DST drift in widget anchors, inline errors without controller and removed dead room lookup

lib/view/pages/files/sharing/share_options_sheet.dart

@@ -154,20 +154,15 @@ class _ShareOptionsBodyState extends State<_ShareOptionsBody> {
       _update(const ShareUpdateParams(password: ''));
 
   Future<void> _confirmDelete() async {
-    // Use showDialog directly (not asDialog) so we get the AsyncDialogAction's
-    // `true` result and can close the options sheet afterwards — popping inside
+    // Close the options sheet only after the dialog returned — popping inside
     // onConfirmAsync would target the dialog route, not the sheet.
-    final dialog = ConfirmDialog(
+    final deleted = await ConfirmDialog(
       title: 'Freigabe löschen?',
       content: 'Die Freigabe wird aufgehoben.',
       confirmButton: 'Löschen',
       onConfirmAsync: () => FileSharingApi().remove(_share.id),
-    );
-    final deleted = await showDialog<bool>(
-      context: context,
-      builder: dialog.build,
-    );
-    if (deleted != true || !mounted) return;
+    ).ask(context);
+    if (!deleted || !mounted) return;
     widget.onChanged();
     if (Navigator.of(context).canPop()) Navigator.of(context).pop();
   }