Fix YouTube Music import (run sync ytmusicapi in thread), remove all Spotify UI

backend/app/api/endpoints/youtube_music.py

@@ -1,3 +1,6 @@
+import asyncio
+from functools import partial
+
 from fastapi import APIRouter, Depends, HTTPException
 from pydantic import BaseModel
 from sqlalchemy import select
@@ -50,9 +53,12 @@ async def import_youtube_playlist(
                 detail="Free tier limited to 1 playlist. Upgrade to Pro for unlimited.",
             )
 
-    # Fetch tracks from YouTube Music
+    # Fetch tracks from YouTube Music (run sync ytmusicapi in thread)
+    loop = asyncio.get_event_loop()
     try:
-        playlist_name, playlist_image, raw_tracks = get_playlist_tracks(data.url)
+        playlist_name, playlist_image, raw_tracks = await loop.run_in_executor(
+            None, partial(get_playlist_tracks, data.url)
+        )
     except ValueError as e:
         raise HTTPException(status_code=400, detail=str(e))
     except Exception:
@@ -102,8 +108,11 @@ async def search_youtube_music(
     if not data.query.strip():
         raise HTTPException(status_code=400, detail="Query cannot be empty")
 
+    loop = asyncio.get_event_loop()
     try:
-        results = search_track(data.query.strip())
+        results = await loop.run_in_executor(
+            None, partial(search_track, data.query.strip())
+        )
     except Exception:
         raise HTTPException(status_code=500, detail="Failed to search YouTube Music")