Central Command Area missing when Block with No Tools is Selected

[jeryj]

Description

When a block with no tools is selected, the top toolbar will show a collapse icon even though no block tools are there. I think we could put a hasAnyBlockControls check within the privately exported useCanBlockToolbarBeFocused.

Step-by-step reproduction instructions

• Go to Site Editor
• Turn on Top Toolbar
• Edit Navigation Template Part
• Click navigation item
• Press Up Arrow until the block toolbar disappears and only a collapse icon shows in its place.

Screenshots, screen recording, code snippet

[Mamaduka]

Related #40346.

So far, I can only reproduce the issue with the Navigation block. The getBlockSelectionStart points to a block that no longer exists in the store, at least with the same clientId.

I guess that the Navigation block recreates its controlled block without properly updating the selection. While #58979 will potentially resolve the issue, it would be nice to track down the cause for the Nav block as well.

[jeryj]

@Mamaduka Ooooh that's a great find! I didn't check to see if it was a navigation block specific bug. I incorrectly assumed that there were blocks with no tools. I do think the idea of #58979 will be useful to have a centralized check of what block tools are showing, and you're right that there's some deeper issue going on with the navigation block here.