Pasting more than one line or paragraph into a title failed with "Title
containers cannot be split". OneNote 2010 keeps a title to the one
paragraph: several lines pasted there, plain or formatted, go where a
picture pasted from the title goes (lab, 2026-10-02), at the end of the
outline where the body starts, in a new outline there on an empty body,
else in a new outline two grid rows below the content. A plain paste now
also drops an empty half of the caret's paragraph, as a formatted one
does and as OneNote did.

Fixes #60.

Assisted-by: claude-opus-5.5