[6.x]: Settings utilities links route to non-existent /Index pages

[pri-simple]

What happened?

Description

In Craft CMS 6.0.0-alpha.10, clicking some Settings utility items causes a frontend console error and the page does not open correctly.

The console shows errors like:

Uncaught (in promise) Error: Page not found: settings/sections/Index
Uncaught (in promise) Error: Page not found: settings/entry-types/Index
Uncaught (in promise) Error: Page not found: settings/fields/Index

Steps to reproduce

1. Log in to the Craft CMS control panel.
2. Go to Settings.
3. Click Sections, Entry Types, or Fields.
4. Check the browser console.

Expected behavior

The selected settings page should open without any console errors.

Actual behavior

The page fails to load and the console reports Page not found errors for routes ending in /Index.

Craft CMS version

6.0.0-alpha.10

PHP version

No response

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions

[linear-code]

CMS-2260