radio: refactor LRC fetching to directly use asyncio for backgrounding, and add null check for album art in RadioUtil

utils/jwt_utils.py

@@ -0,0 +1,19 @@
+from jose import jwt, JWTError
+from ..auth.key_store import get_key_by_kid
+
+JWT_ALGORITHM = "HS256"
+
+
+def decode_jwt(token: str) -> dict | None:
+    """Decode a JWT token using the existing key management system."""
+    try:
+        headers = jwt.get_unverified_header(token)
+        kid = headers.get("kid")
+        if not kid:
+            return None
+        key = get_key_by_kid(kid)
+        if not key:
+            return None
+        return jwt.decode(token, key, algorithms=[JWT_ALGORITHM])
+    except JWTError:
+        return None