feat: fetch beat metadata from api

api.py

@@ -753,6 +753,44 @@ def playlist(playlist_id):
     })
 
 
+@app.route("/metadata", methods=["GET"])
+@require_auth
+def get_metadata():
+    track_id = request.args.get("trackId")
+    meta_type = request.args.get("type", "beats")
+
+    if not track_id:
+        return jsonify({"ok": False, "error": "Missing trackId"}), 400
+
+    access_token = g.spotify_access_token
+    profile = spotify_get_me(access_token)
+    spotify_user_id = profile["id"]
+
+    conn = db()
+    row = conn.execute("""
+        SELECT file_name FROM uploaded_metadata
+        WHERE spotify_user_id = ? AND track_id = ? AND type = ?
+        ORDER BY created_at DESC
+        LIMIT 1
+    """, (spotify_user_id, track_id, meta_type)).fetchone()
+    conn.close()
+
+    if not row:
+        return jsonify({"ok": False, "error": "Not found"}), 404
+
+    file_path = os.path.join(METADATA_UPLOAD_DIR, row["file_name"])
+    if not os.path.isfile(file_path):
+        return jsonify({"ok": False, "error": "Not found"}), 404
+
+    with open(file_path, "r", encoding="utf-8") as f:
+        collection = json.load(f)
+
+    if not isinstance(collection, dict):
+        return jsonify({"ok": False, "error": "Invalid metadata file"}), 500
+
+    return jsonify({"ok": True, "collection": collection})
+
+
 @app.route("/metadata", methods=["POST"])
 @require_auth
 def upload_metadata():