Fix confdir passing to workers

cista/config.py

@@ -3,11 +3,12 @@ from __future__ import annotations
 import os
 import secrets
 import sys
+from contextlib import suppress
 from functools import wraps
 from hashlib import sha256
 from pathlib import Path, PurePath
 from time import time
-from contextlib import suppress
+
 import msgspec
 
 
@@ -45,7 +46,7 @@ def init_confdir():
         home = (
             Path(xdg).expanduser() / "cista" if xdg else Path.home() / ".config/cista"
         )
-    if not home.exists()
+    if not home.is_dir():
         home.mkdir(parents=True, exist_ok=True)
         home.chmod(0o700)