Fix sync script :root parsing, add offline/editor/user to minify. Bump 03.10.06

- Sync: compare against standard theme (not deleted custom starters)
- Sync: handle :root{ on same line (dark.standard.css format)
- Minify: added offline.css, editor.css, a11y-high-contrast.css,
  user.css, user.js to minification list

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/joomla.asset.json

@@ -17,7 +17,7 @@
 			"defgroup": "Joomla.Template.Site",
 			"ingroup": "MokoCassiopeia.Template.Assets",
 			"path": "./media/templates/site/mokocassiopeia/joomla.asset.json",
-			"version": "03.10.05",
+			"version": "03.10.06",
 			"brief": "Joomla asset registry for MokoCassiopeia"
 		}
 	},