M7.6: Character and Paragraph Styles — partial named styles in the document, apply to objects or a Type tool range, Clear Overrides, override-preserving redefine, duplicate/rename/delete; panels with override markers

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/cmd/mod.rs

@@ -26,6 +26,7 @@ pub mod prefscmds;
 mod recolor;
 mod select;
 mod textedit;
+pub mod textstyles;
 mod typecmd;
 mod typemenu;
 pub mod wand;
@@ -150,6 +151,7 @@ pub fn command_specs() -> &'static [CommandSpec] {
         v.extend(colormgmt::specs());
         v.extend(typemenu::specs());
         v.extend(textedit::specs());
+        v.extend(textstyles::specs());
         v.extend(docmenu::specs());
         v.extend(panelcmds::specs());
         v.extend(buildcmds::specs());