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-player.blade.php

@@ -397,7 +397,6 @@
 .ytp-scrubber-container {
     position: absolute;
     top: 50%;
-    transform: translateY(-50%);
     width: 0;
     pointer-events: none;
 }
@@ -406,12 +405,13 @@
     height: 13px;
     border-radius: 50%;
     background: #f00;
-    transform: translate(-50%, 0) scale(0);
+    /* Center the knob on the track: -50% X sits it on the play head, -50% Y keeps it
+       vertically centered on the bar's mid-line (container top:50%) at any bar height. */
+    transform: translate(-50%, -50%) scale(0);
     transition: transform .1s;
-    margin-top: -4px;
 }
 .ytp-progress-bar-container:hover .ytp-scrubber-button,
-.ytp-progress-bar.dragging .ytp-scrubber-button { transform: translate(-50%, 0) scale(1); }
+.ytp-progress-bar.dragging .ytp-scrubber-button { transform: translate(-50%, -50%) scale(1); }
 
 .ytp-hover-time {
     position: absolute;