Describe the bug

When I mount CRUDAdmin at a custom path (for example /dashboard):

admin = CRUDAdmin(mount_path="/dashboard")

• The default mount path /admin works correctly, but any custom mount path (such as /dashboard) causes 404s for all internal links, navigation, and redirects.
• Redirects after login, as well as sidebar navigation, all use the correct custom path prefix but still result in 404 errors.

To Reproduce

1. Mount CRUDAdmin at a custom path, e.g.:

admin = CRUDAdmin(mount_path="/dashboard")

2. Start your application and open /dashboard in your browser.
3. Log in or click on any model/resource in the admin UI.
4. Observe that /dashboard/User/ (and other internal URLs) result in 404 Not Found errors.

Expected behavior

CRUDAdmin should fully support being mounted at any custom path (not just /admin).
All internal URLs, links, and redirects should work when using a custom mount path and should not result in 404 errors.