Type: redefining a text style back to a default updates the text that uses it

A style captured from text left out the attributes that the text's
JSON skips at their defaults, such as the Hyphenation options, the
Composer, tab stops, Auto kerning and the character alignment.
Redefining a paragraph or character style from text set
back to the defaults therefore did not reach the text using the
style: a paragraph that had the old Hyphen Limit or Single-line
Composer from the style kept it. setAttrs dropped a default value it
was given in the same way.

New and Redefine now capture every attribute of the selected text,
and charStyle.setAttrs and paraStyle.setAttrs keep a default value.
When a style changes, text whose value equals the old definition's
takes the new value, a default included. Local overrides on text that
uses a style other than the Normal styles stay, and an attribute that
setAttrs leaves out still leaves the text's value alone. The Character
Styles and Paragraph Styles panels compare the attributes a style holds
with the same attributes of the selection. A paragraph style made from
type with Auto alignment no longer shows "+" on that type.

Two existing behaviors change. Applying a style made with New or
Redefine from text, without Clear Overrides, now also sets the
attributes that text had at their defaults, such as Auto kerning, no
OpenType features, the Every-line Composer, no tab stops and the
default Hyphenation options. Redefining [Normal Paragraph Style] or
[Normal Character Style] from text gives every paragraph or run that
uses it those attributes too, so local values of them on that text are
reset.

Docs: docs/target-app-parity.md.

docs/target-app-parity.md

@@ -394,6 +394,7 @@ since 2026-10-01.
 - **Artboard tab-switch follow-up:** changing the active document through its tab aligns the Artboard tool with the displayed board before Properties Delete; clicking the already-active tab preserves multiselection and Move/Scale Artwork options. Three headless `chrome::tests::artboard_document_tab_*` regressions cover actual tab A → B → A clicks followed by Properties Delete, surviving boards and guides, preserved artwork/symbols and Undo/Redo; controls cover same-tab multiselection, Move/Scale Artwork options and other tools. Historical focused validation on `dbd2497b` recorded one expected RED failure with two passing controls, then all three GREEN tests passed. All three also passed in historical full CI on `a0671777`. A full CI retry on the five-unit combined source at `a0671777` passed all seven stages with 6,613 test outcomes on 2026-10-14. An earlier full-CI run on the identical source panicked in the randomized `ai_mutated_save_never_panics` test; the cause remains unresolved. This five-fix batch does not claim to repair that failure.
 - **Artboard clean active-tab close (2026-10-15):** with the Artboard tool active, closing a clean active tab restores the surviving document's displayed board before Properties Delete. Nine targeted checks passed: three existing tab regressions, one clean close/Delete regression and five existing unsaved-document controls. The close regression checks the correct surviving board, preserved artwork/symbols and object selection, affected guides, one Delete edit, saved state and Undo/Redo. Three reviewed original full-app headless captures show the active tab before closing, the surviving document's shown board after closing, and the correct survivor after Properties Delete, using the actual tab × and Delete controls.
 - **Character-style Auto leading:** capture and explicit style attributes retain Auto as a reset, distinct from omitted leading. Redefine and later numeric updates preserve local leading overrides; the Character Styles marker recognizes Auto correctly. Regression assertions cover partial definitions, Undo/Redo and native save/load serialization. Public references: [Character and paragraph styles](https://helpx.adobe.com/illustrator/using/character-paragraph-styles.html) and [Leading](https://helpx.adobe.com/illustrator/using/line-character-spacing.html).
+- **Text styles redefined to the defaults:** New and Redefine Character Style and Paragraph Style capture every attribute of the selected text, including those at their defaults (Auto kerning, Roman baseline alignment, the default Hyphenation options, the Every-line Composer, no tab stops), and `charStyle.setAttrs` and `paraStyle.setAttrs` keep an attribute set to its default value. After a redefinition, text whose value still equals the old definition's takes the new value, a default included; local overrides and attributes the new definition leaves out stay. The style panels show "+" only where the text differs from its style, including type with Auto alignment. Public reference: [Character and paragraph styles](https://web.archive.org/web/20260825113735/https://helpx.adobe.com/illustrator/using/character-paragraph-styles.html).
 - **Width Point Edit:** Shift-double-click enables Adjust Adjoining Width Points; plain double-click and direct opening retain the default. Tool dispatch and headless dialog tests cover neighboring widths, Undo/Redo and Cancel. Public reference: [Variable-width strokes](https://helpx.adobe.com/illustrator/using/stroke-object.html).
 Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a feature lands.