fix(text): apply explicit sizes and preserve script characters

An explicit size commit normalizes mixed-size selections even when the value matches the displayed size. Caret-only script commands format the whole draft. Mathematical minus uses reversible Unicode forms and ASCII hyphen-minus remains unchanged. Correct the applied-selection comment and document the character policy in parity and the tool.

Co-Authored-By: Codex GPT-6.1 <noreply@openai.com>

parity/acrobat-features.toml

@@ -1975,7 +1975,7 @@ evidence = [
   "crates/ui-egui/tests/it/editing.rs::the_format_panel_toggles_superscript_and_subscript_on_selection",
   "crates/automation/tests/it/automation.rs::superscript_and_subscript_through_tools",
 ]
-notes = "Toggled in the Format text panel for the selection, and headlessly with text_script on a paragraph or a byte range of it; each toggle of a paragraph is one undo step. Uses Unicode superscript and subscript forms (2 ↔ ²) rather than text rise (Ts) and font scaling, so the font must provide the corresponding glyphs and extracted text contains the Unicode characters. Characters Unicode has no form for (q, most capitals in subscript) stay as they are and don't stop a toggle back; the minus sign comes back as a hyphen-minus."
+notes = "Toggled in the Format text panel for the selection, and headlessly with text_script on a paragraph or a byte range of it; each toggle of a paragraph is one undo step. Uses Unicode superscript and subscript forms (2 ↔ ²) rather than text rise (Ts) and font scaling, so the font must provide the corresponding glyphs and extracted text contains the Unicode characters. Characters Unicode has no form for (q, most capitals in subscript) stay as they are and don't stop a toggle back; the mathematical minus sign U+2212 has a reversible form, while ASCII hyphen-minus stays unchanged."
 
 [[feature]]
 id = "edit.paragraph-alignment"