fix(header): unify top icon-card size and layout

Add a single always-loaded header-cards.css that normalizes the
顶部多功能组件图标卡片 geometry (equal-width cells, fixed 45px icon
badge, zibll mobile padding) across all pages, and enqueue it from
ScriptsPart1b. Remove the orphan header-components.css + subdirectory
that were never enqueued. Repoint the icon-card contract test at the
new stylesheet.

src/Core/ScriptsPart1b.php

@@ -106,6 +106,7 @@ trait ScriptsPart1b {
         // AKSRT domain styles load after Zibll main.css. The old aggregate is
         // intentionally not used because it contains the removed navigation CSS.
         $enqueue_module('base');
+        $enqueue_module('header-cards');
         $enqueue_module('card-primitives');
         $enqueue_module('overlay-primitives');
 		$enqueue_module('layout');