The four character match blocks become two const tables in a new engine
module, text_script, keeping the minus sign's mapping. One toggle_script in
Edit text replaces the three copies (paragraph editor, added-text draft and
the Format text button state).
A range is now 'already in the script' when at least one character is and
none of the others has a form in it. Before, one character with no Unicode
form (a space, q, H in H2O) kept the range from ever counting as converted,
so the second click converted again, changed nothing, and the text could not
be toggled back.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
