Improve artist name extraction in wishlist selection

Enhanced the logic for extracting artist name and ID to handle both object and string formats from Spotify API and sanitized data. Added fallbacks to ensure artist information is correctly retrieved from multiple possible data structures.

webui/static/script.js

@@ -5364,8 +5364,27 @@ async function selectWishlistCategory(category) {
                 }
 
                 const albumName = spotifyData?.album?.name || 'Unknown Album';
-                const artistName = spotifyData?.artists?.[0]?.name || 'Unknown Artist';
-                const artistId = spotifyData?.artists?.[0]?.id || null;
+
+                // Handle both object format {name: '...'} and sanitized string format
+                let artistName = 'Unknown Artist';
+                let artistId = null;
+                if (spotifyData?.artists?.[0]?.name) {
+                    // Object format from Spotify API
+                    artistName = spotifyData.artists[0].name;
+                    artistId = spotifyData.artists[0].id;
+                } else if (spotifyData?.artists?.[0] && typeof spotifyData.artists[0] === 'string') {
+                    // Sanitized string format
+                    artistName = spotifyData.artists[0];
+                } else if (Array.isArray(track.artists) && track.artists.length > 0) {
+                    // Fallback to track.artists
+                    if (typeof track.artists[0] === 'string') {
+                        artistName = track.artists[0];
+                    } else if (track.artists[0]?.name) {
+                        artistName = track.artists[0].name;
+                        artistId = track.artists[0].id;
+                    }
+                }
+
                 const albumImage = spotifyData?.album?.images?.[0]?.url || '';
 
                 // Use album ID if available, otherwise create unique key from album + artist