fix: Sync playback context after creating radio

Call getPlaybackContext() to sync radio context from backend to frontend
This ensures the Radio icon appears in NowPlayingBar

src/lib/components/views/ArtistDetailView.svelte

@@ -4,7 +4,7 @@
   import type { ArtistDetail, QobuzArtist } from '$lib/types';
   import AlbumCard from '../AlbumCard.svelte';
   import TrackMenu from '../TrackMenu.svelte';
-  import { consumeContextTrackFocus, setPlaybackContext } from '$lib/stores/playbackContextStore';
+  import { consumeContextTrackFocus, setPlaybackContext, getPlaybackContext } from '$lib/stores/playbackContextStore';
   import { togglePlay } from '$lib/stores/playerStore';
   import { getQueue, syncQueueState, playQueueIndex } from '$lib/stores/queueStore';
   import { tick } from 'svelte';
@@ -271,6 +271,9 @@
       radioLoadingMessage = 'Radio function is still experimental...';
       await new Promise(resolve => setTimeout(resolve, 400));
 
+      // Sync context from backend
+      await getPlaybackContext();
+
       // Play first track from queue
       const firstTrack = await playQueueIndex(0);
 
@@ -318,6 +321,9 @@
       });
       console.log(`[Radio] Track radio created: ${sessionId}`);
 
+      // Sync context from backend
+      await getPlaybackContext();
+
       // Play first track from queue
       const firstTrack = await playQueueIndex(0);