[Bug] Locale dropdown showing null for user's does not have the access to selected default locale
### Node Version

18.20.2

### NPM/Yarn/PNPM Version

10.5.0

### Strapi Version

5.5.1

### Operating System

MacOS

### Database

PostgreSQL

### Javascript or Typescript

Javascript

### Reproduction URL

_No response_

### Bug Description

Locale Dropdown showing nothing (null) not selected by default. The user have access to view/edit the italian locale(it-IT) contents. But note that the default locale is set English(en).

### Steps to Reproduce

1.create the contents in two different locales as super admin role. example - English(en) and Italy (it-IT)
2.Go to setting internationalisation(i18n) set  English(en) as a default locale.
3.Go to roles and permissions create a new user's role and give access to those content created collection only for Italy locales
4.Now logout and login with a new user with restricted access to see the relavent content(it-IT) locale alone.
5.But the user nothing can see locale dropdown
6.(it-IT) locale is not selected and contents are not visible but if click the dropdown i can able to see the (it-IT) locale and i can able select and see the relavent content.
7.Why by default i cannot able to see the selected locale and their content?

### Expected Behavior



This is the current behaviour
<img width="1362" alt="Image" src="https://github.com/user-attachments/assets/b134dc59-b898-4427-b8f7-cb8675c15326" />

Expected behaviour
The user can able to see the selected locale in locale dropdown and also contents also should be visible to the user
<img width="1379" alt="Image" src="https://github.com/user-attachments/assets/eca5db64-a2d4-48cc-a413-7daf9635d115" />




### Logs

```shell

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### Code Snippets

_No response_

### Media

_No response_

### Additional information

_No response_

### Confirmation Checklist

- [x] I have checked the existing [issues](https://github.com/strapi/strapi/issues) for duplicates.
- [x] I agree to follow this project's [Code of Conduct](https://github.com/strapi/strapi/blob/develop/CODE_OF_CONDUCT.md).