Remove unused --layout-aside-background-color interface token

CHANGELOG.md

@@ -21,6 +21,7 @@ The official launch. Everything from the 0.9 beta reviewed, restructured, and bu
 
 - The framework now uses **native CSS cascade layers**: `settings, base, elements, global, components, theme, helpers`. Layer order, not import order or specificity, decides priority, and your own unlayered CSS beats the framework by default.
 - Framework and docs-site CSS fully split (`src/styles/framework/` vs `src/styles/site/`).
+- Removed the `--layout-aside-background-color` interface token: no rule in the framework or the docs site ever consumed it. Style `.layout_content_aside` directly if you want an aside background.
 - Docs site upgraded to Astro 7.
 
 ### Breaking

dist/css/settings.ui.css

@@ -259,7 +259,6 @@ xxl: 1920px
   --layout-content-width: 70ch;
   --layout-aside-width: 245px;
   --layout-toc-width: 1fr;
-  --layout-aside-background-color: var(--base-100);
 
   --prose-spacing: var(--sm1);
 }

dist/mcss.css

@@ -545,7 +545,6 @@ xxl: 1920px
   --layout-content-width: 70ch;
   --layout-aside-width: 245px;
   --layout-toc-width: 1fr;
-  --layout-aside-background-color: var(--base-100);
 
   --prose-spacing: var(--sm1);
 }

src/styles/framework/settings.ui.css

@@ -119,7 +119,6 @@
   --layout-content-width: 70ch;
   --layout-aside-width: 245px;
   --layout-toc-width: 1fr;
-  --layout-aside-background-color: var(--base-100);
 
   --prose-spacing: var(--sm1);
 }