Replace blank SVG icons with Unicode check and cross in pros-cons block

SVG icons were being stripped by wp_kses_post(), causing blank circles.
Use Unicode ✓ (✓) and ✗ (✗) characters instead.

https://claude.ai/code/session_014oW9hEbbWi1nvD43nJn3AV

Author: claude

blocks/pros-cons/pros-cons.css

@@ -16,9 +16,9 @@ function acf_pros_cons_process_list($html, $type = 'positive') {
             return '';
         }
 
-        // SVG icons (inline for performance - no extra HTTP requests)
-        $check_icon = '<span class="acf-pros-cons__icon" aria-hidden="true"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"></polyline></svg></span>';
-        $x_icon = '<span class="acf-pros-cons__icon" aria-hidden="true"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"></line><line x1="6" y1="6" x2="18" y2="18"></line></svg></span>';
+        // Unicode icons for pros/cons
+        $check_icon = '<span class="acf-pros-cons__icon" aria-hidden="true">&#x2713;</span>';
+        $x_icon = '<span class="acf-pros-cons__icon" aria-hidden="true">&#x2717;</span>';
 
         $icon = ($type === 'positive') ? $check_icon : $x_icon;