refactor: Rename global current playlist methods for clarity and consistency

app/repositories/playlist.py

@@ -53,20 +53,7 @@ class PlaylistRepository(BaseRepository[Playlist]):
             logger.exception("Failed to get main playlist")
             raise
 
-    async def get_current_playlist(self, user_id: int) -> Playlist | None:
-        """Get the user's current playlist."""
-        try:
-            statement = select(Playlist).where(
-                Playlist.user_id == user_id,
-                Playlist.is_current == True,  # noqa: E712
-            )
-            result = await self.session.exec(statement)
-            return result.first()
-        except Exception:
-            logger.exception("Failed to get current playlist for user: %s", user_id)
-            raise
-
-    async def get_global_current_playlist(self) -> Playlist | None:
+    async def get_current_playlist(self) -> Playlist | None:
         """Get the global current playlist (app-wide)."""
         try:
             statement = select(Playlist).where(
@@ -75,7 +62,7 @@ class PlaylistRepository(BaseRepository[Playlist]):
             result = await self.session.exec(statement)
             return result.first()
         except Exception:
-            logger.exception("Failed to get global current playlist")
+            logger.exception("Failed to get current playlist")
             raise
 
     async def search_by_name(