fix(CLS): move APU table row classes from JS to PHP server-side

PROBLEM:
- apu-tables-auto-class.js was adding CSS classes to table rows after DOMContentLoaded
- This DOM manipulation caused CLS of 0.692 in Lab Data (PageSpeed Insights)
- body.wp-singular was the main culprit with 0.692 CLS contribution

SOLUTION:
- Added roi_add_apu_row_classes() function in Inc/apu-tables.php
- This applies the same logic server-side during the_content filter
- Classes (section-header, subtotal-row, total-row) are now in HTML from first render
- Disabled the JS script in Inc/enqueue-scripts.php

This should significantly reduce Lab Data CLS (target: < 0.1)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Inc/enqueue-scripts.php

@@ -578,26 +578,29 @@ add_action('wp_enqueue_scripts', 'roi_enqueue_apu_tables_styles', 5); // Priorit
 /**
  * Enqueue APU Tables auto-class JavaScript
  *
- * Este script detecta automáticamente filas especiales en tablas .desglose y .analisis
- * y les agrega las clases CSS correspondientes (section-header, subtotal-row, total-row)
+ * DESHABILITADO: Este script causaba CLS de 0.692 en Lab Data.
+ * La manipulación del DOM con JS después de DOMContentLoaded causa Layout Shift.
  *
- * Issue #132
+ * La lógica ha sido movida a PHP server-side en Inc/apu-tables.php
+ * @see roi_add_apu_row_classes()
+ *
+ * Issue #132 - Original implementation
  */
-function roi_enqueue_apu_tables_autoclass_script() {
-    // APU Tables Auto-Class JS
-    wp_enqueue_script(
-        'roi-apu-tables-autoclass',
-        get_template_directory_uri() . '/Assets/js/apu-tables-auto-class.js',
-        array(),
-        ROI_VERSION,
-        array(
-            'in_footer' => true,
-            'strategy'  => 'defer',
-        )
-    );
-}
-
-add_action('wp_enqueue_scripts', 'roi_enqueue_apu_tables_autoclass_script', 15);
+// function roi_enqueue_apu_tables_autoclass_script() {
+//     // APU Tables Auto-Class JS
+//     wp_enqueue_script(
+//         'roi-apu-tables-autoclass',
+//         get_template_directory_uri() . '/Assets/js/apu-tables-auto-class.js',
+//         array(),
+//         ROI_VERSION,
+//         array(
+//             'in_footer' => true,
+//             'strategy'  => 'defer',
+//         )
+//     );
+// }
+// add_action('wp_enqueue_scripts', 'roi_enqueue_apu_tables_autoclass_script', 15);
+// DISABLED: Moved to server-side PHP to prevent CLS
 
 /**
  * Enqueue CTA Box Sidebar styles (Issue #36)