show artist decade in genres

+ assign default artist separators if db is empty
+ add instrumental to album version
+ check if album is a single by checking og_title and current title
+ hard code juice wrld artist name in model
+ set album aritst to first artist if track has no album artist
+ rewrite get_base_album_title regex to use existing album versions
+ misc

app/models/track.py

@@ -64,6 +64,16 @@ class Track:
                     [a for a in featured if create_hash(a) not in original_lower]
                 )
 
+            self.artist_hashes = "-".join(create_hash(a, decode=True) for a in artists)
+            self.artists = [ArtistMinimal(a) for a in artists]
+
+            albumartists = split_artists(self.albumartists)
+
+            if not albumartists:
+                self.albumartists = self.artists[:1]
+            else:
+                self.albumartists = [ArtistMinimal(a) for a in albumartists]
+
             if get_flag(SessionVarKeys.REMOVE_PROD):
                 new_title = remove_prod(new_title)
 
@@ -84,12 +94,6 @@ class Track:
             if get_flag(SessionVarKeys.MERGE_ALBUM_VERSIONS):
                 self.recreate_albumhash()
 
-            self.artist_hashes = "-".join(create_hash(a, decode=True) for a in artists)
-            self.artists = [ArtistMinimal(a) for a in artists]
-
-            albumartists = split_artists(self.albumartists)
-            self.albumartists = [ArtistMinimal(a) for a in albumartists]
-
         self.image = self.albumhash + ".webp"
 
         if self.genre is not None and self.genre != "":