Fase 1: Estructura Base y DI Container - Clean Architecture

COMPLETADO: Fase 1 de la migración a Clean Architecture + POO

## Estructura de Carpetas
- ✓ Estructura completa de 4 capas (Domain, Application, Infrastructure, Presentation)
- ✓ Carpetas de Use Cases (SaveComponent, GetComponent, DeleteComponent, SyncSchema)
- ✓ Estructura de tests (Unit, Integration, E2E)
- ✓ Carpetas de schemas y templates

## Composer y Autoloading
- ✓ PSR-4 autoloading configurado para ROITheme namespace
- ✓ Autoloader optimizado regenerado

## DI Container
- ✓ DIContainer implementado con patrón Singleton
- ✓ Métodos set(), get(), has() para gestión de servicios
- ✓ Getters específicos para ComponentRepository, ValidationService, CacheService
- ✓ Placeholders que serán implementados en Fase 5
- ✓ Prevención de clonación y deserialización

## Interfaces
- ✓ ComponentRepositoryInterface (Domain)
- ✓ ValidationServiceInterface (Application)
- ✓ CacheServiceInterface (Application)
- ✓ Component entity placeholder (Domain)

## Bootstrap
- ✓ functions.php actualizado con carga de Composer autoloader
- ✓ Inicialización del DIContainer
- ✓ Helper function roi_container() disponible globalmente

## Tests
- ✓ 10 tests unitarios para DIContainer (100% cobertura)
- ✓ Total: 13 tests unitarios, 28 assertions
- ✓ Suite de tests pasando correctamente

## Validación
- ✓ Script de validación automatizado (48/48 checks pasados)
- ✓ 100% de validaciones exitosas

La arquitectura base está lista para la Fase 2.

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

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

template-parts/content.php

@@ -4,7 +4,7 @@
  *
  * @link https://developer.wordpress.org/themes/basics/template-hierarchy/
  *
- * @package Apus_Theme
+ * @package ROI_Theme
  * @since 1.0.0
  */
 ?>
@@ -36,7 +36,7 @@
 				// Posted by author
 				printf(
 					'<span class="byline"> %s <span class="author vcard"><a class="url fn n" href="%s">%s</a></span></span>',
-					esc_html__( 'by', 'apus-theme' ),
+					esc_html__( 'by', 'roi-theme' ),
 					esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
 					esc_html( get_the_author() )
 				);
@@ -45,9 +45,9 @@
 				if ( ! post_password_required() && ( comments_open() || get_comments_number() ) ) :
 					echo '<span class="comments-link">';
 					comments_popup_link(
-						esc_html__( 'Leave a comment', 'apus-theme' ),
-						esc_html__( '1 Comment', 'apus-theme' ),
-						esc_html__( '% Comments', 'apus-theme' )
+						esc_html__( 'Leave a comment', 'roi-theme' ),
+						esc_html__( '1 Comment', 'roi-theme' ),
+						esc_html__( '% Comments', 'roi-theme' )
 					);
 					echo '</span>';
 				endif;
@@ -63,11 +63,11 @@
 		<div class="post-thumbnail">
 			<?php
 			if ( is_singular() ) :
-				the_post_thumbnail( 'apus-featured-large', array( 'alt' => the_title_attribute( array( 'echo' => false ) ) ) );
+				the_post_thumbnail( 'roi-featured-large', array( 'alt' => the_title_attribute( array( 'echo' => false ) ) ) );
 			else :
 				?>
 				<a href="<?php the_permalink(); ?>" aria-hidden="true" tabindex="-1">
-					<?php the_post_thumbnail( 'apus-featured-medium', array( 'alt' => the_title_attribute( array( 'echo' => false ) ) ) ); ?>
+					<?php the_post_thumbnail( 'roi-featured-medium', array( 'alt' => the_title_attribute( array( 'echo' => false ) ) ) ); ?>
 				</a>
 				<?php
 			endif;
@@ -84,7 +84,7 @@
 				sprintf(
 					wp_kses(
 						/* translators: %s: Name of current post. Only visible to screen readers */
-						__( 'Continue reading<span class="screen-reader-text"> "%s"</span>', 'apus-theme' ),
+						__( 'Continue reading<span class="screen-reader-text"> "%s"</span>', 'roi-theme' ),
 						array(
 							'span' => array(
 								'class' => array(),
@@ -98,7 +98,7 @@
 			// Display pagination for multi-page posts
 			wp_link_pages(
 				array(
-					'before' => '<div class="page-links">' . esc_html__( 'Pages:', 'apus-theme' ),
+					'before' => '<div class="page-links">' . esc_html__( 'Pages:', 'roi-theme' ),
 					'after'  => '</div>',
 				)
 			);
@@ -112,21 +112,21 @@
 	<footer class="entry-footer">
 		<?php
 		// Display categories
-		$categories_list = get_the_category_list( esc_html__( ', ', 'apus-theme' ) );
+		$categories_list = get_the_category_list( esc_html__( ', ', 'roi-theme' ) );
 		if ( $categories_list ) :
 			printf(
 				'<span class="cat-links">%s %s</span>',
-				esc_html__( 'Categories:', 'apus-theme' ),
+				esc_html__( 'Categories:', 'roi-theme' ),
 				$categories_list // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
 			);
 		endif;
 
 		// Display tags
-		$tags_list = get_the_tag_list( '', esc_html_x( ', ', 'list item separator', 'apus-theme' ) );
+		$tags_list = get_the_tag_list( '', esc_html_x( ', ', 'list item separator', 'roi-theme' ) );
 		if ( $tags_list ) :
 			printf(
 				'<span class="tags-links">%s %s</span>',
-				esc_html__( 'Tags:', 'apus-theme' ),
+				esc_html__( 'Tags:', 'roi-theme' ),
 				$tags_list // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
 			);
 		endif;
@@ -136,7 +136,7 @@
 			sprintf(
 				wp_kses(
 					/* translators: %s: Name of current post. Only visible to screen readers */
-					__( 'Edit <span class="screen-reader-text">%s</span>', 'apus-theme' ),
+					__( 'Edit <span class="screen-reader-text">%s</span>', 'roi-theme' ),
 					array(
 						'span' => array(
 							'class' => array(),