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]>

app/Http/Controllers/VideoController.php

@@ -997,12 +997,11 @@ class VideoController extends Controller
                     $data['thumbnail'] = "{$nasDir}/thumb.{$ext}";
                 }
             } else {
-                // NAS disabled — keep on local disk
-                $localDir = $nas->localVideoDir($video);
+                // NAS disabled — keep on local disk, mirroring the NAS path
+                $nasDir   = $this->nasVideoDir($video, $nas);
+                $localDir = storage_path('app/' . $nasDir);
                 @mkdir($localDir, 0755, true);
                 $request->file('thumbnail')->move($localDir, "thumb.{$ext}");
-                $userSlug = $nas->userSlug($video->user);
-                $nasDir   = $this->nasVideoDir($video, $nas);
                 $data['thumbnail'] = "{$nasDir}/thumb.{$ext}";
             }
         }
@@ -1041,13 +1040,13 @@ class VideoController extends Controller
                 $nasForSlides = app(\App\Services\NasSyncService::class);
                 $nasEnabled  = $nasForSlides->isEnabled();
 
-                // Derive NAS dir without scanning when possible
-                $nasDir = $nasEnabled ? $this->nasVideoDir($video, $nasForSlides) : null;
-
-                // Local dir used as fallback or when NAS is off
-                $localDir = $nasForSlides->localVideoDir($video);
-                $userSlug = $nasForSlides->userSlug($video->user);
+                // Derive NAS dir without scanning — works regardless of NAS state
                 $relBase  = $this->nasVideoDir($video, $nasForSlides);
+                $nasDir   = $nasEnabled ? $relBase : null;
+
+                // Local dir mirrors the NAS path so MediaController can find files
+                // whether NAS is reachable or not.
+                $localDir = storage_path('app/' . $relBase);
 
                 if ($nasEnabled) {
                     $nasForSlides->mkdirp("{$nasDir}/slides");