Add Bootstrap 5 single product page layout

Add two-column responsive grid (image gallery + product summary) for
single product pages, following the same bridge pattern used for
product archives.

Key changes:
- Create content-single-product.php bridge and Twig layout template
- Add single product renderer at template_redirect priority 11
- Disable WooCommerce block compatibility layer that strips classic
  hooks when parent theme has theme.json
- Move PHP templates to woocommerce/ subfolder for cleaner structure
- Fix Twig templates to self-compute context data not passed by
  wc_get_template() (tabs, short-description, meta, rating)
- Fix Underscore.js triple-brace syntax conflict in variation template
  by wrapping in {% verbatim %}

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

functions.php

@@ -272,11 +272,11 @@ function wc_bootstrap_remove_default_sidebar(): void {
 add_action( 'init', 'wc_bootstrap_remove_default_sidebar' );
 
 /**
- * Prevent the parent theme from rendering product archives.
+ * Prevent the parent theme from rendering WooCommerce pages.
  *
  * The parent theme's TemplateController hooks template_redirect at priority 10
- * and renders pages/archive.html.twig for all archives (then exits). For product
- * archives, we need to render our own WooCommerce-specific Bootstrap layout instead.
+ * and renders its own templates for all requests (then exits). For WooCommerce
+ * pages we need to render our own Bootstrap layouts instead.
  * Returning false tells the parent theme to skip rendering for this request.
  *
  * @param bool $should_render Whether the parent theme should render.
@@ -284,16 +284,38 @@ add_action( 'init', 'wc_bootstrap_remove_default_sidebar' );
  *
  * @since 0.1.0
  */
-function wc_bootstrap_skip_parent_archive( bool $should_render ): bool {
+function wc_bootstrap_skip_parent_template( bool $should_render ): bool {
     if ( is_post_type_archive( 'product' ) || is_page( wc_get_page_id( 'shop' ) ) ) {
         return false;
     }
     if ( function_exists( 'is_product_taxonomy' ) && is_product_taxonomy() ) {
         return false;
     }
+    if ( function_exists( 'is_product' ) && is_product() ) {
+        return false;
+    }
     return $should_render;
 }
-add_filter( 'wp_bootstrap_should_render_template', 'wc_bootstrap_skip_parent_archive' );
+add_filter( 'wp_bootstrap_should_render_template', 'wc_bootstrap_skip_parent_template' );
+
+/**
+ * Disable WooCommerce's block template compatibility layer.
+ *
+ * The parent theme has theme.json which makes wp_is_block_theme() return true.
+ * WooCommerce detects this and removes classic template hooks (title, price,
+ * add-to-cart, etc.) from single product and archive pages, expecting blocks
+ * to handle rendering instead. Since we render via classic hooks + Twig, we
+ * need the hooks to stay registered.
+ *
+ * @param bool $disabled Whether the compatibility layer is disabled.
+ * @return bool
+ *
+ * @since 0.1.0
+ */
+function wc_bootstrap_disable_block_compatibility( bool $disabled ): bool {
+    return true;
+}
+add_filter( 'woocommerce_disable_compatibility_layer', 'wc_bootstrap_disable_block_compatibility' );
 
 /**
  * Render product archive pages with Bootstrap 5 layout.
@@ -323,7 +345,7 @@ function wc_bootstrap_render_product_archive(): void {
 
     // Capture WooCommerce archive content via output buffering.
     ob_start();
-    include get_stylesheet_directory() . '/archive-product.php';
+    include get_stylesheet_directory() . '/woocommerce/archive-product.php';
     $content = ob_get_clean();
 
     // Build parent theme context and inject archive content into page shell.
@@ -344,3 +366,50 @@ function wc_bootstrap_render_product_archive(): void {
     exit;
 }
 add_action( 'template_redirect', 'wc_bootstrap_render_product_archive', 11 );
+
+/**
+ * Render single product pages with Bootstrap 5 layout.
+ *
+ * Since the parent theme's TemplateController is blocked for single products
+ * (via wp_bootstrap_should_render_template filter), we render the page ourselves
+ * at priority 11 using the parent theme's TwigService and page shell.
+ *
+ * The single-product.php file fires WooCommerce hooks and is captured via output
+ * buffering, then injected into the parent theme's page template — the same
+ * pattern as wc_bootstrap_render_product_archive().
+ *
+ * @since 0.1.0
+ */
+function wc_bootstrap_render_single_product(): void {
+    if ( ! function_exists( 'is_product' ) || ! is_product() ) {
+        return;
+    }
+
+    if ( ! class_exists( '\WPBootstrap\Twig\TwigService' )
+        || ! class_exists( '\WPBootstrap\Template\ContextBuilder' ) ) {
+        return;
+    }
+
+    // Capture WooCommerce single product content via output buffering.
+    ob_start();
+    include get_stylesheet_directory() . '/woocommerce/single-product.php';
+    $content = ob_get_clean();
+
+    // Build parent theme context and inject product content into page shell.
+    $context_builder = new \WPBootstrap\Template\ContextBuilder();
+    $theme_context   = $context_builder->build();
+    $twig            = \WPBootstrap\Twig\TwigService::getInstance();
+
+    $theme_context['post'] = array_merge(
+        $theme_context['post'] ?? [],
+        [
+            'content'   => $content,
+            'title'     => '',
+            'thumbnail' => '',
+        ]
+    );
+
+    echo $twig->render( 'pages/page.html.twig', $theme_context );
+    exit;
+}
+add_action( 'template_redirect', 'wc_bootstrap_render_single_product', 11 );