- Fixed the thumbnail loading issue on paginated pretty URLs.

The bug was relative media paths like media/thumbs/... resolving under 
routes such as /v/<slug>?page=2 or /search/<query>?page=2. I added 
public_media_url() in 
[includes/db.php](/Users/tyemeclifford/Documents/GH/mediaplayer/includes/db.php) 
and updated public thumbnails, posters, and local player sources in 
[index.php](/Users/tyemeclifford/Documents/GH/mediaplayer/index.php), 
[catalogue.php](/Users/tyemeclifford/Documents/GH/mediaplayer/catalogue.php), 
and [embed.php](/Users/tyemeclifford/Documents/GH/mediaplayer/embed.php) 
to use root/base-aware URLs.

embed.php

@@ -21,7 +21,7 @@ $base_url = $scheme . '://' . $host . $script . '/';  // e.g. https://tyclifford
 $player_sources = [];
 if ($video && !empty($video['sources'])) {
     foreach ($video['sources'] as $source) {
-        $player_source = source_player_data($source, $base_url . MEDIA_URL);
+        $player_source = source_player_data($source, public_absolute_url(public_media_url()));
         if ($player_source) $player_sources[] = $player_source;
     }
 }
@@ -216,7 +216,7 @@ header('Content-Security-Policy: frame-ancestors *');
              class="video-js vjs-default-skin vjs-big-play-centered"
              controls preload="metadata"
              <?php if ($video['thumbnail']): ?>
-               poster="<?= htmlspecialchars($base_url . MEDIA_URL . $video['thumbnail'], ENT_QUOTES) ?>"
+               poster="<?= htmlspecialchars(public_absolute_url(public_media_url($video['thumbnail'])), ENT_QUOTES) ?>"
              <?php endif; ?>>
         <?php foreach ($native_player_sources as $src): ?>
           <source