* fix: appendText API now attributes text to the specified author
spliceText() was calling makeSplice() without passing author attributes,
so inserted text had no authorship attribution in the changeset — even
though the authorId was recorded in the revision metadata. Now passes
[['author', authorId]] and the pool to makeSplice() so the changeset
ops carry the author attribute, making the text show the author's color
in the editor and appear in listAuthorsOfPad.
Also fixed the same issue in pad init (first changeset creation) and
updated PadType interface to include the authorId parameter.
Fixes#6873
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* test: assert API response code on createPad and anonymous appendText
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
