Revert "fix(frontend): drop 12px font pin on header icon cards to match reference"

This reverts commit 6fcd63b923.

assets/css/build/public.css

@@ -2512,6 +2512,14 @@ main.container,
   box-sizing: border-box;
 }
 
+/* Header multifunc icon cards: pin typography baseline so cards render
+ * identically on all pages. .px12-sm is only defined globally in
+ * legacy-utilities.css, which is @import'd by the single-post aggregator;
+ * vendor CSS pins it at <=640px / .sidebar / .mobile-nav-widget only. */
+.header-slider-card .icon-cover-card {
+  font-size: 12px;
+}
+
 /* Keep the header multifunction search stable across route-specific CSS.
  * Some routes load a later .abs-right utility, while the global input focus
  * ring looks like an extra border against this transparent pill field. */

assets/css/frontend/base.css

@@ -104,6 +104,14 @@ main.container,
   box-sizing: border-box;
 }
 
+/* Header multifunc icon cards: pin typography baseline so cards render
+ * identically on all pages. .px12-sm is only defined globally in
+ * legacy-utilities.css, which is @import'd by the single-post aggregator;
+ * vendor CSS pins it at <=640px / .sidebar / .mobile-nav-widget only. */
+.header-slider-card .icon-cover-card {
+  font-size: 12px;
+}
+
 /* Keep the header multifunction search stable across route-specific CSS.
  * Some routes load a later .abs-right utility, while the global input focus
  * ring looks like an extra border against this transparent pill field. */

tests/widget-system/icon-card-contract.test.cjs

@@ -33,16 +33,9 @@ test('homepage horizontal cards render fully from legacy CSS with no dedicated s
   assert.equal(fs.existsSync(path.join(root, 'assets/css/frontend/header-cards.css')), false);
   assert.doesNotMatch(baseCss, /\.icon-cover-card\.aksrt-icon-cover-card/);
   assert.doesNotMatch(baseCss, /\.header-components-card/);
-  // Reference theme pins no font-size on header cards: text inherits the
-  // bootstrap 14px baseline (title .em12 -> 16.8px). A local 12px override
-  // made AKSRT cards visually smaller than the reference.
-  assert.doesNotMatch(
+  assert.match(
     baseCss,
-    /\.header-slider-card\s+\.icon-cover-card\s*\{[^}]*font-size/s,
-  );
-  assert.doesNotMatch(
-    read('assets/css/build/public.css'),
-    /\.header-slider-card\s+\.icon-cover-card\s*\{[^}]*font-size/s,
+    /\.header-slider-card\s+\.icon-cover-card\s*\{[^}]*font-size:\s*12px/s,
   );
   assert.doesNotMatch(scripts, /header-cards/);
   assert.doesNotMatch(widgetCss, /aksrt-widget-icon-cards \.icon-cover-card/);