Fix player UI: sports Highlights pane, scrubber knob, volume knob, description + save-to-playlist

Player/UI fixes:
- Sports (match) Highlights pane: move the toggle click-handler script out of
  the always-false @if(false ...) legacy block so the "Highlights" button opens,
  and emit videoId/isOwner with @json instead of {{ json_encode() }} (escaped
  quotes crashed the data/tab/CRUD block once route keys became hashid strings).
- Progress scrubber knob (video + audio players): center on the track line with
  translate(-50%, -50%); drop the margin-top hack that floated it above the line.
- Music player volume: give the slider wrap height so overflow:hidden no longer
  crops the knob; add a subtle thumb shadow for visibility.
- Music language menu: cap height to available space above the header, sticky
  header, internal scroll; keep controls from auto-hiding while the menu is open.
- Description box: re-check "Show more" overflow at every settle point (fonts,
  images, rAF, tab reopen) so SPA autonext keeps the expand button.

Also bundles pending work: save-to-playlist button component, playlist/channel
views, PlaylistController + NasSyncService, and component-usage tracker updates.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

resources/views/components/video-actions.blade.php

@@ -177,10 +177,10 @@
     @endif
 
     <!-- Save to Playlist Button -->
-    <button class="action-btn desktop-action" onclick="openAddToPlaylistModal({{ $video->id }})">
+    <x-save-to-playlist-button :video="$video" class="action-btn desktop-action">
         <i class="bi bi-bookmark"></i>
         <span>Save</span>
-    </button>
+    </x-save-to-playlist-button>
 
     @php
         $dlAccess = $video->download_access ?? 'disabled';
@@ -280,9 +280,9 @@
                 </button>
             @endif
 
-                    <button class="dropdown-item" onclick="openAddToPlaylistModal({{ $video->id }})">
-                <i class="bi bi-bookmark"></i> Save
-            </button>
+            <x-save-to-playlist-button :video="$video" class="dropdown-item">
+                <i class="bi bi-bookmark"></i> <span>Save</span>
+            </x-save-to-playlist-button>
             @if($showDl)
             @if($isAudioDl)
             <a class="dropdown-item" href="#"