fix(discover): link recently played album artists by source

Retain artist IDs in new history snapshots and enable artist links in the carousel and View all. Route local sources to Local Library Artists and resolve older Qobuz snapshots through the existing album lookup.

cx

crates/qbz-qt/src/recently_qt.rs

@@ -79,6 +79,8 @@ pub struct RecentAlbum {
     #[serde(default)]
     pub artist: String,
     #[serde(default)]
+    pub artist_id: Option<u64>,
+    #[serde(default)]
     pub artwork_url: String,
     #[serde(default)]
     pub quality_tier: String,
@@ -116,6 +118,7 @@ fn derive_albums(tracks: &[RecentTrack]) -> Vec<RecentAlbum> {
             id: track.album_id.clone(),
             title: track.album_title.clone(),
             artist: track.album_artist.clone(),
+            artist_id: track.artist_id,
             artwork_url: track.album_artwork_url.clone(),
             quality_tier: track.quality_tier.clone(),
             quality_label: track.quality_label.clone(),
@@ -276,6 +279,7 @@ pub(crate) fn record_in_context(track: RecentTrack, context_kind: &str) {
                 id: track.album_id.clone(),
                 title: track.album_title.clone(),
                 artist: track.album_artist.clone(),
+                artist_id: track.artist_id,
                 artwork_url: track.album_artwork_url.clone(),
                 quality_tier: track.quality_tier.clone(),
                 quality_label: track.quality_label.clone(),
@@ -434,6 +438,32 @@ pub(crate) fn record_queue_track(track: &qbz_models::QueueTrack) {
 mod tests {
     use super::*;
 
+    #[test]
+    fn album_history_keeps_artist_identity_and_reads_old_snapshots() {
+        let tracks = vec![RecentTrack {
+            album_id: "catalog-album".into(),
+            album_artist: "Led Zeppelin".into(),
+            artist_id: Some(123),
+            source: "qobuz".into(),
+            ..Default::default()
+        }];
+        let albums = derive_albums(&tracks);
+        let encoded = serde_json::to_string(&albums[0]).unwrap();
+        let album: RecentAlbum = serde_json::from_str(&encoded).unwrap();
+        let card = crate::home_qt::map_recent_album(album);
+        assert_eq!(card.artist_id, "123");
+        assert!(card.history_artist_link);
+        let old: RecentAlbum =
+            serde_json::from_str(r#"{"id":"old-album","artist":"Led Zeppelin"}"#).unwrap();
+        assert_eq!(old.artist_id, None);
+        let card = crate::home_qt::map_recent_album(old);
+        assert!(card.artist_id.is_empty());
+        assert!(
+            card.history_artist_link,
+            "old albums still need a clickable name"
+        );
+    }
+
     #[test]
     fn local_dsd_queue_metadata_records_the_multiple_in_both_histories() {
         for (rate, expected) in [