Offline Support

lib/screens/announcements/create_announcement_dialog.dart

@@ -269,7 +269,14 @@ class _CreateAnnouncementContentState
         );
       }
     } catch (e) {
-      if (mounted) showErrorSnackBar(context, 'Failed to save: $e');
+      if (mounted) {
+        if (isOfflineSaveError(e)) {
+          Navigator.of(context).pop();
+          showSuccessSnackBarGlobal('Announcement saved offline — will sync when connected.');
+        } else {
+          showErrorSnackBar(context, 'Failed to save: $e');
+        }
+      }
     } finally {
       if (mounted) setState(() => _submitting = false);
     }
@@ -537,7 +544,14 @@ class _BannerSettingsContentState
       if (mounted) Navigator.of(context).pop();
       showSuccessSnackBarGlobal('Banner settings saved.');
     } catch (e) {
-      if (mounted) showErrorSnackBar(context, 'Failed to save: $e');
+      if (mounted) {
+        if (isOfflineSaveError(e)) {
+          Navigator.of(context).pop();
+          showSuccessSnackBarGlobal('Banner settings saved offline — will sync when connected.');
+        } else {
+          showErrorSnackBar(context, 'Failed to save: $e');
+        }
+      }
     } finally {
       if (mounted) setState(() => _submitting = false);
     }