`CanvasUiAccessCheck` should grant access if the user has access to content templates or code components

We have lots of coverage for canvas field related access as kernel tests, so this only covers early returns with a unit test.

1. Can you provide screenshots that confirm the (very helpful! 🙏) comments you added in src/Access/CanvasUiAccessCheck.php?
2. Also: why not expand \Drupal\Tests\canvas\Kernel\Controller\CanvasControllerTest::testControllerExposedPermissions() instead of add a unit test for a subset?

Can you provide screenshots that confirm the (very helpful! 🙏) comments you added in src/Access/CanvasUiAccessCheck.php?

This isn't true at the moment. The UI requires access to edit pages.
If you only have access to e.g. content templates, you cannot see the menu bar, you see an error on the page navigator, and you see the auto-saved pending changes list.

Also: why not expand \Drupal\Tests\canvas\Kernel\Controller\CanvasControllerTest::testControllerExposedPermissions() instead of add a unit test for a subset?

That has coverage, IMHO one thing is the exposed permissions flags and another the UI access check itself.

That all makes sense 😊👍 Thanks!

Thanks!

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