feat: Handle Safari-mangled backup ZIPs and improve backup UI (#3674)

frontend/lang/messages/en-US.json

@@ -635,6 +635,7 @@
       "backup-created-at-response-export_path": "Backup Created at {path}",
       "backup-deleted": "Backup deleted",
       "restore-success": "Restore successful",
+      "restore-fail": "Restore failed. Check your server logs for more details",
       "backup-tag": "Backup Tag",
       "create-heading": "Create A Backup",
       "delete-backup": "Delete Backup",

frontend/pages/admin/backups.vue

@@ -162,6 +162,8 @@ export default defineComponent({
       if (error) {
         console.log(error);
         state.importDialog = false;
+        state.runningRestore = false;
+        alert.error(i18n.tc("settings.backup.restore-fail"));
       } else {
         alert.success(i18n.tc("settings.backup.restore-success"));
         $auth.logout();