Minor: transformState and setting error cleanup (#6841)

## Summary

Fixes the routing of TransformState through the node and the console
error from a setting that ends up being undefined via
useRenderModeSetting.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6841-Minor-transformState-and-setting-error-cleanup-2b46d73d3650817a8da7fca5bc56ea9a)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/platform/settings/settingStore.ts

@@ -38,8 +38,9 @@ function onChange(
   }
   // Backward compatibility with old settings dialog.
   // Some extensions still listens event emitted by the old settings dialog.
-  // @ts-expect-error 'setting' is possibly 'undefined'.ts(18048)
-  app.ui.settings.dispatchChange(setting.id, newValue, oldValue)
+  if (setting) {
+    app.ui.settings.dispatchChange(setting.id, newValue, oldValue)
+  }
 }
 
 export const useSettingStore = defineStore('setting', () => {