fix(structure): Rename assets and inc folders for Linux compatibility

- assets → Assets
- inc → Inc

Completes the case-sensitivity fixes for Linux servers.

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

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

Inc/seo.php

@@ -0,0 +1,200 @@
+<?php
+/**
+ * SEO Optimizations and Rank Math Compatibility
+ *
+ * This file contains SEO-related theme functions that work
+ * seamlessly with Rank Math SEO plugin without conflicts.
+ *
+ * @package ROI_Theme
+ * @since 1.0.0
+ */
+
+// Exit if accessed directly
+if (!defined('ABSPATH')) {
+    exit;
+}
+
+/**
+ * Remove WordPress version from header and feeds
+ *
+ * Prevents disclosure of WordPress version number which could
+ * expose potential vulnerabilities. This is a common SEO best practice.
+ *
+ * @since 1.0.0
+ */
+function roi_remove_generator() {
+    return '';
+}
+remove_action('wp_head', 'wp_generator');
+add_filter('the_generator', 'roi_remove_generator');
+
+/**
+ * Remove RSD (Really Simple Discovery) link
+ *
+ * Removes unnecessary header link that's rarely needed.
+ *
+ * @since 1.0.0
+ */
+remove_action('wp_head', 'rsd_link');
+
+/**
+ * Remove Windows Live Writer manifest
+ *
+ * Removes deprecated Microsoft Windows Live Writer support link.
+ *
+ * @since 1.0.0
+ */
+remove_action('wp_head', 'wlwmanifest_link');
+
+/**
+ * Remove REST API link from header
+ *
+ * Note: Rank Math handles REST API headers, so we keep REST API
+ * itself enabled but remove the link tag from the header.
+ * This prevents exposing API endpoints unnecessarily.
+ *
+ * @since 1.0.0
+ */
+remove_action('wp_head', 'rest_output_link_wp_head');
+
+/**
+ * Optimize robots.txt headers
+ *
+ * Ensures proper cache headers for robots.txt
+ *
+ * @since 1.0.0
+ */
+function roi_robots_header() {
+    if (is_robots()) {
+        header('Cache-Control: public, max-age=86400');
+        header('Expires: ' . gmdate('r', time() + 86400));
+    }
+}
+add_action('pre_handle_robots_txt', 'roi_robots_header');
+
+/**
+ * Improve comment feed performance
+ *
+ * Disables post comments feed if not needed (can be re-enabled
+ * in theme options if required for client websites).
+ *
+ * @since 1.0.0
+ */
+// Note: Keep this commented out unless client specifically needs comment feeds
+// remove_action('wp_head', 'feed_links', 2);
+
+/**
+ * Clean up empty image alt attributes
+ *
+ * Encourages proper image SEO by highlighting missing alt text in admin
+ *
+ * @since 1.0.0
+ */
+function roi_admin_notice_missing_alt() {
+    if (!current_user_can('upload_files')) {
+        return;
+    }
+
+    // This is informational - actual alt text enforcement is better
+    // handled by Rank Math's image optimization features
+}
+
+/**
+ * Ensure wp_head() is properly closed before body
+ *
+ * This is called in header.php to ensure all SEO meta tags
+ * (from Rank Math and theme) are properly placed.
+ *
+ * @since 1.0.0
+ */
+function roi_seo_head_hooks() {
+    // This ensures proper hook execution order for Rank Math compatibility
+    do_action('roi_head_close');
+}
+
+/**
+ * ELIMINADO: roi_prefetch_external()
+ *
+ * Motivo: Fuentes Poppins ahora son self-hosted (Assets/fonts/)
+ * Ya no se necesita preconnect a Google Fonts
+ *
+ * @since 1.0.0 - Creado
+ * @since 1.1.0 - Eliminado (self-hosted fonts)
+ */
+
+/**
+ * Open Graph support for Rank Math compatibility
+ *
+ * Ensures theme doesn't output conflicting OG tags when Rank Math is active.
+ * Rank Math handles all Open Graph implementation.
+ *
+ * @since 1.0.0
+ */
+function roi_check_rank_math_active() {
+    return defined('RANK_MATH_VERSION');
+}
+
+/**
+ * Schema.org compatibility layer
+ *
+ * Provides basic schema support if Rank Math is not active.
+ * When Rank Math is active, it takes over all schema implementation.
+ *
+ * @since 1.0.0
+ */
+function roi_schema_fallback() {
+    // Only output schema if Rank Math is NOT active
+    if (roi_check_rank_math_active()) {
+        return;
+    }
+
+    // Basic organization schema fallback
+    $schema = array(
+        '@context' => 'https://schema.org',
+        '@type' => 'WebSite',
+        'name' => get_bloginfo('name'),
+        'url' => get_home_url(),
+    );
+
+    if (get_bloginfo('description')) {
+        $schema['description'] = get_bloginfo('description');
+    }
+
+    echo "\n" . '<!-- ROI Theme Basic Schema (Rank Math not active) -->' . "\n";
+    echo '<script type="application/ld+json">' . "\n";
+    echo wp_json_encode($schema, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE) . "\n";
+    echo '</script>' . "\n";
+}
+add_action('wp_head', 'roi_schema_fallback', 20);
+
+/**
+ * Security headers configuration
+ *
+ * Adds recommended security headers that also improve SEO
+ * (by indicating secure, well-maintained site)
+ *
+ * @since 1.0.0
+ */
+function roi_security_headers() {
+    // These headers improve trust signals for search engines
+    header('X-Content-Type-Options: nosniff');
+    header('X-Frame-Options: SAMEORIGIN');
+    header('X-XSS-Protection: 1; mode=block');
+}
+add_action('send_headers', 'roi_security_headers');
+
+/**
+ * Ensure title tag support is active
+ *
+ * This is set in functions.php with add_theme_support('title-tag')
+ * but we verify it here to log any issues for debugging.
+ *
+ * @since 1.0.0
+ */
+function roi_verify_title_tag_support() {
+    if (!current_theme_supports('title-tag')) {
+        // Log warning if title-tag support is somehow disabled
+        error_log('Warning: ROI Theme title-tag support not properly initialized');
+    }
+}
+add_action('after_setup_theme', 'roi_verify_title_tag_support', 20);