[grade=B] v1.9.1: YouTube links auto-render as video cards in beeps, replies, and quotes (click-to-play, nocookie embed)

includes/class-quotes.php

@@ -87,6 +87,7 @@ class Beep_Quotes {
             '<span class="beep-quoted-time">' . $time . '</span>' .
             '</div>' .
             '<div class="beep-quoted-text">' . $content . '</div>' .
+            beep_render_youtube_card($quoted['content']) .
             '</div></div>';
     }
 

includes/helpers.php

@@ -353,6 +353,7 @@ function beep_render_post($post, $args = []) {
                 <?php endif; ?>
             </div>
             <div class="beep-text"><?php echo $content; ?></div>
+            <?php echo beep_render_youtube_card($post->post_content); ?>
             <?php if (!empty($beep_images)) : ?>
                 <div class="beep-media-attachments">
                     <?php echo Beep_Media::render_image_gallery($beep_images); ?>
@@ -611,6 +612,7 @@ function beep_render_reply($comment, $all_comments = [], $depth = 0, $post_id =
                 <?php endif; ?>
             </div>
             <div class="beep-text"><?php echo $content; ?></div>
+            <?php echo beep_render_youtube_card($comment->comment_content); ?>
 
             <?php if (!empty($reply_images)) : ?>
                 <div class="beep-media-attachments">
@@ -710,6 +712,34 @@ function beep_format_content($text) {
     return $text;
 }
 
+/**
+ * Extract the first YouTube video ID from a text string, if any.
+ * Supports youtube.com/watch?v=, youtu.be/, shorts/, embed/, live/.
+ * Returns the 11-char video ID or ''.
+ */
+function beep_youtube_id_from_text($text) {
+    if (!preg_match_all('#(?<![\w.-])(?:https?://)?(?:www\.|m\.)?(?:youtube\.com/(?:watch\?[^#\s]*v=|shorts/|embed/|live/)|youtu\.be/)([A-Za-z0-9_-]{11})(?![A-Za-z0-9_-])#i', (string) $text, $m)) {
+        return '';
+    }
+    return $m[1][0];
+}
+
+/**
+ * Render a click-to-play YouTube card for the first YouTube link in $text.
+ * Thumbnail (hqdefault) + play button; JS swaps in the iframe on click.
+ * Returns '' when no YouTube link is present.
+ */
+function beep_render_youtube_card($text) {
+    $vid = beep_youtube_id_from_text($text);
+    if ($vid === '') {
+        return '';
+    }
+    return '<div class="beep-yt-card" data-beep-yt="' . esc_attr($vid) . '" role="button" tabindex="0" aria-label="Play embedded YouTube video">'
+        . '<img class="beep-yt-thumb" src="https://i.ytimg.com/vi/' . esc_attr($vid) . '/hqdefault.jpg" alt="" loading="lazy">'
+        . '<span class="beep-yt-play"><svg viewBox="0 0 24 24" width="28" height="28" fill="currentColor" aria-hidden="true"><path d="M8 5v14l11-7z"/></svg></span>'
+        . '</div>';
+}
+
 function beep_relative_time($timestamp) {
     $now  = time();
     $diff = $now - $timestamp;