Enter, Backspace, Delete, Tab and Shift-Tab, lists and multi-line paste
work in outlines with tags, lists, nesting and collapsed paragraphs,
following OneNote 2010 keystroke by keystroke (evidence replayed in
editor/evidence.rs): Enter never carries a tag, the upper paragraph wins
a join, and bullets restyle as they indent. The toolbar applies all nine
default tags, drawn from one set of tag art in canvas, and paste goes
through the editor's paste.

Pages our writer created open again (a missing indent table takes
OneNote's default and either title flag marks the title), pictures that
won't decode show a placeholder and save unchanged, and TIFFs decode.

Assisted-by: claude-opus-5.5
Assisted-by: claude-opus-5