feat: Implement search and sorting functionality for playlists in API and repository

app/services/playlist.py

@@ -8,7 +8,7 @@ from sqlmodel.ext.asyncio.session import AsyncSession
 from app.core.logging import get_logger
 from app.models.playlist import Playlist
 from app.models.sound import Sound
-from app.repositories.playlist import PlaylistRepository
+from app.repositories.playlist import PlaylistRepository, PlaylistSortField, SortOrder
 from app.repositories.sound import SoundRepository
 
 logger = get_logger(__name__)
@@ -212,6 +212,27 @@ class PlaylistService:
         """Search all playlists by name."""
         return await self.playlist_repo.search_by_name(query)
 
+    async def search_and_sort_playlists(
+        self,
+        search_query: str | None = None,
+        sort_by: PlaylistSortField | None = None,
+        sort_order: SortOrder = SortOrder.ASC,
+        user_id: int | None = None,
+        include_stats: bool = False,
+        limit: int | None = None,
+        offset: int = 0,
+    ) -> list[dict]:
+        """Search and sort playlists with optional statistics."""
+        return await self.playlist_repo.search_and_sort(
+            search_query=search_query,
+            sort_by=sort_by,
+            sort_order=sort_order,
+            user_id=user_id,
+            include_stats=include_stats,
+            limit=limit,
+            offset=offset,
+        )
+
     async def get_playlist_sounds(self, playlist_id: int) -> list[Sound]:
         """Get all sounds in a playlist."""
         await self.get_playlist_by_id(playlist_id)  # Verify playlist exists