refactor: move Analytics from ThemeSettings to AdsensePlacement

- Remove Analytics and AdSense tabs from theme-settings component
- Add Analytics group to adsense-placement component
- Add roi_enqueue_analytics_script() for GA4/UA support
- Clean up ThemeSettings to only handle custom code (CSS/JS)
- Update FormBuilders and FieldMappers accordingly

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

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

Inc/adsense-placement.php

@@ -1,10 +1,14 @@
 <?php
 /**
- * AdSense Placement - Helper Functions
+ * AdSense Placement & Google Analytics - Helper Functions
  *
  * Funciones para usar en templates:
  * - roi_render_ad_slot('post-top')
  * - roi_render_rail_ads() - Para los margenes laterales del viewport
+ *
+ * Funciones auto-registradas en wp_head:
+ * - roi_enqueue_adsense_script() - Script principal de AdSense
+ * - roi_enqueue_analytics_script() - Script de Google Analytics
  */
 
 if (!defined('ABSPATH')) {
@@ -231,3 +235,106 @@ function roi_inject_content_ads(string $content): string
         return $content;
     }
 }
+
+/**
+ * Carga el script de Google Analytics (GA4 o Universal Analytics)
+ */
+function roi_enqueue_analytics_script(): void
+{
+    global $container;
+
+    if ($container === null || is_admin()) {
+        return;
+    }
+
+    try {
+        $repository = $container->getComponentSettingsRepository();
+        $settings = $repository->getComponentSettings('adsense-placement');
+
+        // Verificar si Analytics esta habilitado
+        if (!($settings['analytics']['analytics_enabled'] ?? false)) {
+            return;
+        }
+
+        $trackingId = trim($settings['analytics']['ga_tracking_id'] ?? '');
+        if (empty($trackingId)) {
+            return;
+        }
+
+        // Verificar si GA ya esta cargado por otro plugin
+        if (roi_is_analytics_loaded()) {
+            return;
+        }
+
+        $anonymizeIp = ($settings['analytics']['ga_anonymize_ip'] ?? true) === true;
+
+        // Detectar tipo de ID (GA4 vs Universal Analytics)
+        if (strpos($trackingId, 'G-') === 0) {
+            roi_render_ga4_script($trackingId, $anonymizeIp);
+        } elseif (strpos($trackingId, 'UA-') === 0) {
+            roi_render_universal_analytics_script($trackingId, $anonymizeIp);
+        }
+
+    } catch (\Throwable $e) {
+        if (defined('WP_DEBUG') && WP_DEBUG) {
+            error_log('ROI Analytics: ' . $e->getMessage());
+        }
+    }
+}
+add_action('wp_head', 'roi_enqueue_analytics_script', 1);
+
+/**
+ * Verifica si Google Analytics ya esta cargado por otro plugin
+ */
+function roi_is_analytics_loaded(): bool
+{
+    // Verificar si MonsterInsights esta activo
+    if (class_exists('MonsterInsights_Lite') || class_exists('MonsterInsights')) {
+        return true;
+    }
+
+    // Verificar si Site Kit de Google esta activo
+    if (class_exists('Google\Site_Kit\Plugin')) {
+        return true;
+    }
+
+    return false;
+}
+
+/**
+ * Renderiza script de Google Analytics 4
+ */
+function roi_render_ga4_script(string $trackingId, bool $anonymizeIp): void
+{
+    $config = $anonymizeIp ? "{ 'anonymize_ip': true }" : '{}';
+
+    echo '<!-- Google Analytics 4 (ROI Theme) -->' . "\n";
+    echo '<script async src="https://www.googletagmanager.com/gtag/js?id=' . esc_attr($trackingId) . '"></script>' . "\n";
+    echo '<script>' . "\n";
+    echo 'window.dataLayer = window.dataLayer || [];' . "\n";
+    echo 'function gtag(){dataLayer.push(arguments);}' . "\n";
+    echo 'gtag("js", new Date());' . "\n";
+    echo 'gtag("config", "' . esc_js($trackingId) . '", ' . $config . ');' . "\n";
+    echo '</script>' . "\n";
+}
+
+/**
+ * Renderiza script de Universal Analytics (legacy)
+ */
+function roi_render_universal_analytics_script(string $trackingId, bool $anonymizeIp): void
+{
+    $anonymizeConfig = $anonymizeIp ? 'ga("set", "anonymizeIp", true);' : '';
+
+    echo '<!-- Universal Analytics (ROI Theme) -->' . "\n";
+    echo '<script>' . "\n";
+    echo '(function(i,s,o,g,r,a,m){i["GoogleAnalyticsObject"]=r;i[r]=i[r]||function(){' . "\n";
+    echo '(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),' . "\n";
+    echo 'm=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)' . "\n";
+    echo '})(window,document,"script","https://www.google-analytics.com/analytics.js","ga");' . "\n";
+    echo 'ga("create", "' . esc_js($trackingId) . '", "auto");' . "\n";
+    if (!empty($anonymizeConfig)) {
+        echo $anonymizeConfig . "\n";
+    }
+    echo 'ga("send", "pageview");' . "\n";
+    echo '</script>' . "\n";
+}