HTML Architect: Refactor tab endpoint

Its needed to refactor tab section in swagger

For create node think about a better name

And maybe if its be needed think about future refactoring of this section

“OpenNewItem” maybe the best option for now for refactoring “CreateNode“

Hi Danil,

OpenNewItem fits what the UI does: it opens a new, unsaved item in a tab. With persist, though, the item is saved and its tab closed straight away. I’d go with CreateItem, which covers both cases and matches SectionEditor/CreateItem and ScreenEditor/CreateItem.

Heads-up: a few endpoint descriptions and error messages for the AI agent refer to /Tab/CreateNode by name, so they’d need updating with the rename.

Happy to review the PR once it’s up.