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>

attachment.php

@@ -7,7 +7,7 @@
  *
  * @link https://developer.wordpress.org/themes/basics/template-hierarchy/#attachment
  *
- * @package Apus_Theme
+ * @package ROI_Theme
  * @since 1.0.0
  */
 
@@ -41,7 +41,7 @@ get_header();
 										<?php
 										printf(
 											/* translators: %s: attachment date */
-											esc_html__( 'Uploaded on %s', 'apus-theme' ),
+											esc_html__( 'Uploaded on %s', 'roi-theme' ),
 											'<span class="date-text">' . esc_html( get_the_date() ) . '</span>'
 										);
 										?>
@@ -57,7 +57,7 @@ get_header();
 										<?php
 										printf(
 											/* translators: %s: file size */
-											esc_html__( 'Size: %s', 'apus-theme' ),
+											esc_html__( 'Size: %s', 'roi-theme' ),
 											esc_html( size_format( $metadata['filesize'] ) )
 										);
 										?>
@@ -72,7 +72,7 @@ get_header();
 										<?php
 										printf(
 											/* translators: 1: width, 2: height */
-											esc_html__( 'Dimensions: %1$s × %2$s pixels', 'apus-theme' ),
+											esc_html__( 'Dimensions: %1$s × %2$s pixels', 'roi-theme' ),
 											esc_html( number_format_i18n( $metadata['width'] ) ),
 											esc_html( number_format_i18n( $metadata['height'] ) )
 										);
@@ -109,7 +109,7 @@ get_header();
 									<a href="<?php echo esc_url( wp_get_attachment_url() ); ?>"
 									   class="btn btn-primary download-link"
 									   download>
-										<?php esc_html_e( 'Download Original', 'apus-theme' ); ?>
+										<?php esc_html_e( 'Download Original', 'roi-theme' ); ?>
 									</a>
 								</div>
 
@@ -120,7 +120,7 @@ get_header();
 										<?php
 										printf(
 											/* translators: %s: attachment file name */
-											esc_html__( 'File: %s', 'apus-theme' ),
+											esc_html__( 'File: %s', 'roi-theme' ),
 											'<strong>' . esc_html( basename( get_attached_file( get_the_ID() ) ) ) . '</strong>'
 										);
 										?>
@@ -130,7 +130,7 @@ get_header();
 									<a href="<?php echo esc_url( wp_get_attachment_url() ); ?>"
 									   class="btn btn-primary download-link"
 									   download>
-										<?php esc_html_e( 'Download File', 'apus-theme' ); ?>
+										<?php esc_html_e( 'Download File', 'roi-theme' ); ?>
 									</a>
 								</div>
 							<?php endif; ?>
@@ -151,7 +151,7 @@ get_header();
 							// Display page links for paginated content
 							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>',
 								)
 							);
@@ -171,7 +171,7 @@ get_header();
 										<?php
 										printf(
 											/* translators: %s: parent post title */
-											esc_html__( 'View: %s', 'apus-theme' ),
+											esc_html__( 'View: %s', 'roi-theme' ),
 											'<span class="parent-title">' . esc_html( get_the_title( $parent_post ) ) . '</span>'
 										);
 										?>
@@ -185,7 +185,7 @@ get_header();
 								sprintf(
 									wp_kses(
 										/* translators: %s: Attachment title. 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(),