chore(test): zero out safe-area insets in test environments

Author: ShaneK

core/scripts/testing/scripts.js

@@ -48,6 +48,24 @@
     document.head.appendChild(style);
   }
 
+  /**
+   * Zero out safe-area insets in test environments.
+   * The default 20px --ion-safe-area-top from core.scss is for legacy
+   * status bar simulation but doesn't represent real browser behavior.
+   * Tests that need to verify safe-area handling should explicitly set
+   * these values in their test HTML files.
+   */
+  const safeAreaStyle = document.createElement('style');
+  safeAreaStyle.innerHTML = `
+    :root {
+      --ion-safe-area-top: 0px;
+      --ion-safe-area-bottom: 0px;
+      --ion-safe-area-left: 0px;
+      --ion-safe-area-right: 0px;
+    }
+  `;
+  document.head.appendChild(safeAreaStyle);
+
   /**
    * The `palette` param is used to load a specific palette
    * for the theme.