An .xlsx cell reference far from the others no longer allocates the whole
range before the cell cap (billions of cells, out of memory), and long
column names can't overflow. IDML import doesn't trust zip part sizes for
up-front allocation and adds header/footer counts saturating. Tagged Text
and IDML export use let-else; the font fallback has a compiled-in last
resort. These crates deny the panicking lints.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Paragraph and character styles become CSS classes through slug(), which
keeps only ASCII letters and digits. Different styles could therefore get
the same class: every all-non-ASCII name ("見出し", "本文", Cyrillic,
Greek…) becomes `basic`, and "Body Text" / "Body-Text" / "body text" all
become `body-text`. style.css then holds several rules for one class and
the last one wins, so e.g. a 30 pt centred Japanese heading style came
out at the body style's 10 pt, left-aligned, in the EPUB.
Map each style name to a class once per export (paragraph and character
styles separately), adding -2, -3… on a collision, and use that map for
both the stylesheet and the XHTML. A class set in Export Tagging still
takes precedence in the XHTML, as before.
Test: styles_whose_names_slug_alike_keep_their_own_classes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
