完成 Ruff 全量清理

tests/test_logger.py

@@ -3,7 +3,7 @@
 import gzip
 import logging
 import tempfile
-from datetime import datetime, timedelta
+from datetime import UTC, datetime, timedelta
 from pathlib import Path
 
 from utils.logger import (
@@ -40,7 +40,8 @@ class TestLogger:
 
             archives = list(Path(tmpdir).glob("app-2026-08-28.log.*.gz"))
             assert len(archives) == 1
-            archived_content = gzip.open(archives[0], "rt", encoding="utf-8").read()
+            with gzip.open(archives[0], "rt", encoding="utf-8") as archive:
+                archived_content = archive.read()
             current_content = log_path.read_text(encoding="utf-8")
             combined = archived_content + current_content
             assert "super-secret" not in combined
@@ -50,7 +51,7 @@ class TestLogger:
 
     def test_daily_log_switches_to_a_new_dated_file(self):
         with tempfile.TemporaryDirectory() as tmpdir:
-            today = datetime.now().date()
+            today = datetime.now(UTC).date()
             old_path = (
                 Path(tmpdir) / f"app-{(today - timedelta(days=1)).isoformat()}.log"
             )