[FSE] When static front page/posts page is set, disable the page editor, redirect to Site Editor

[aurooba]

What problem does this address?

This is a confusion I encountered myself – despite understanding the WordPress Template Hierarchy extremely well – and have watched others encounter too. It stems from being able to do things one way before and having the paradigm change in FSE.

When you set a page as the static front page in a block theme, you should be editing the Front Page template in the Site Editor rather than in the Page Editor. However, because you can still add things to the Page you set as the Front Page, it's easy to get confused and starting working on the page there.

When a Page is set as the Posts page, there is a little notice in the snackbar letting you know you are editing the Posts page.

This is better, but still not enough, because the phrasing leads you to believe that you are making actual edits to the Posts page, when in fact, edits here will do nothing, because you should be editing the Home template in the Site Editor (the fact that it's called the Home page, directly coming from the Template Hierarchy is super problematic and I'll leave that for another issue I'll inevitably make).

What is your proposed solution?

When a Front Page is set, the Block Editor should be disabled and have a button to take you to the Site Editor, the same goes for the Posts page. Or better yet, let's make it automatic! Clicking Edit on the page set as the Front Page or the Posts page could automatically redirect you to the appropriate template in the Site Editor.

[aurooba]

Closing this up and moving the conversation to #29821