[pull] main from ueberdosis:main - #186

…-extension

…-extension

feat: add the streaming-reveal extension to @tiptap/ai-toolkit

* Fix JSX runtime for nested sibling children

Spread children arrays into the returned DOMOutputSpec so sibling
elements are spread as separate children instead of nested arrays.
Treat a single DOMOutputSpec array (starts with a string) as a single
child, filter out null/undefined entries, and treat empty arrays as
no children.
Add unit tests covering nested siblings and edge cases, and include
a changeset.

* Improve DOMOutputSpec detection in JSX runtime

Add tests covering DOMOutputSpec edge cases: tag+0, tag+attrs+0,
array of DOMOutputSpec arrays, and nested child DOMOutputSpec. Update
h() detection to treat the second element as valid when it is
undefined, 0, an attrs object, or a nested DOMOutputSpecArray.

* test: add edge case tests for content hole (0) handling

* fix: handle string as second element in DOMOutputSpec detection

* Preserve JSX boundaries for DOM output specs

* Flatten nested Fragment children in JSX runtime

Flatten nested Fragment children and skip null/undefined values when
creating JSX elements. Introduce JSXChild type and update Fragment and
h to use the flattened children. Add unit test for spreading a nested
Fragment between sibling elements.

* refactor(core): remove unused multipleChildren parameter