Add track support and UI list in DetailView

Introduce Track and ApiTrack types and add tracks to ApiMediaItem/Media. Map ApiMediaItem.tracks into Media in convertApiToMedia. Implement a conditional Tracks section in DetailView that lists sorted tracks with search input, track number, title, artist, duration and a play button (only shown when tracks exist). Files changed: src/types.ts, src/api.ts, src/components/DetailView.tsx.

src/types.ts

@@ -16,6 +16,7 @@ export interface Media {
   studios?: string[];
   status?: 'watching' | 'completed' | 'planned' | 'dropped' | 'reading' | 'listening' | 'playing' | 'on-hold';
   episodes?: Episode[];
+  tracks?: Track[];
   staff?: Staff[];
   categories?: string[];
   platforms?: string[];
@@ -39,6 +40,15 @@ export interface Episode {
   thumbnail: string;
 }
 
+export interface Track {
+  id: number;
+  media_id: number;
+  track_number: number;
+  title: string;
+  duration: number | null;
+  artist: string;
+}
+
 export interface Staff {
   id: string;
   name: string;