fix: expose show card description field

README.md

@@ -148,7 +148,8 @@ uses different host paths or image user IDs.
 
 - **Appearance > Customize**: hero, manifesto, laboratory, teacher, lessons, contacts,
   social links, and footer.
-- **Shows**: poster, title, excerpt, year, place, and order.
+- **Shows**: poster, title, short description, year, place, and order. The short
+  description is the **Descrizione breve** field inside **Dettagli spettacolo**.
 - **Gallery**: image, category, caption/title, and order.
 - **Settings > General**: site name and tagline.
 

docs/runbook.md

@@ -48,6 +48,11 @@ HTTPS redirects during production startup.
 4. Confirm the uploaded file exists under `WORDPRESS_DATA_PATH/wp-content/uploads` and
    is readable by the WordPress container user.
 
+## Show card description is hard to find
+
+Edit **Spettacoli**, open the show, then use **Dettagli spettacolo > Descrizione
+breve**. That field is rendered below the title in the homepage show card.
+
 ## A service cannot write to its volume
 
 1. Stop the affected service.

wordpress/mu-plugins/azionelab-content.php

@@ -58,6 +58,11 @@ function azionelab_show_meta_box( WP_Post $post ): void {
     $year = get_post_meta( $post->ID, 'azl_show_year', true );
     $location = get_post_meta( $post->ID, 'azl_show_location', true );
     ?>
+    <p>
+        <label for="azl_show_excerpt"><strong>Descrizione breve</strong></label><br>
+        <textarea id="azl_show_excerpt" name="azl_show_excerpt" class="widefat" rows="4"><?php echo esc_textarea( $post->post_excerpt ); ?></textarea>
+        <span class="description">Questo testo appare nella card dello spettacolo in homepage.</span>
+    </p>
     <p><label for="azl_show_year"><strong>Anno</strong></label><br><input id="azl_show_year" name="azl_show_year" type="number" min="1900" max="2100" value="<?php echo esc_attr( $year ); ?>"></p>
     <p><label for="azl_show_location"><strong>Luogo</strong></label><br><input id="azl_show_location" name="azl_show_location" type="text" class="widefat" value="<?php echo esc_attr( $location ); ?>"></p>
     <?php
@@ -90,10 +95,19 @@ function azionelab_save_meta( int $post_id ): void {
 
     $post_type = get_post_type( $post_id );
     if ( 'azl_show' === $post_type ) {
+        $excerpt = isset( $_POST['azl_show_excerpt'] ) ? sanitize_textarea_field( wp_unslash( $_POST['azl_show_excerpt'] ) ) : '';
         $year = isset( $_POST['azl_show_year'] ) ? absint( $_POST['azl_show_year'] ) : 0;
         $location = isset( $_POST['azl_show_location'] ) ? sanitize_text_field( wp_unslash( $_POST['azl_show_location'] ) ) : '';
         update_post_meta( $post_id, 'azl_show_year', $year );
         update_post_meta( $post_id, 'azl_show_location', $location );
+        remove_action( 'save_post', 'azionelab_save_meta' );
+        wp_update_post(
+            array(
+                'ID'           => $post_id,
+                'post_excerpt' => $excerpt,
+            )
+        );
+        add_action( 'save_post', 'azionelab_save_meta' );
     } elseif ( 'azl_gallery' === $post_type ) {
         $allowed = array( 'Lezioni', 'Backstage', 'Spettacoli', 'Gruppo' );
         $category = isset( $_POST['azl_gallery_category'] ) ? sanitize_text_field( wp_unslash( $_POST['azl_gallery_category'] ) ) : '';