fix(#1834): 批量修复 UP 系列静态分析警告（UP007/UP006/UP017/UP035） (#1928)

Co-authored-by: xiaoxia <dev@xiaoxiajianji.com>
Co-committed-by: xiaoxia <dev@xiaoxiajianji.com>

tests/unit/test_generated_video_verification_code.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import timedelta
+from datetime import UTC, timedelta
 
 import pytest
 
@@ -214,13 +214,13 @@ class TestVerificationCodeCreate:
         """过期时间正确（5分钟后）."""
         from datetime import datetime, timezone
 
-        before = datetime.now(timezone.utc) + timedelta(seconds=299)
+        before = datetime.now(UTC) + timedelta(seconds=299)
         vc = VerificationCode.create(
             recipient="u@test.com",
             code_type="reset_password",
             ttl_seconds=300,
         )
-        after = datetime.now(timezone.utc) + timedelta(seconds=301)
+        after = datetime.now(UTC) + timedelta(seconds=301)
         assert before <= vc.expires_at <= after
 
     def test_custom_ttl(self):
@@ -232,7 +232,7 @@ class TestVerificationCodeCreate:
         )
         from datetime import datetime, timezone
 
-        now = datetime.now(timezone.utc)
+        now = datetime.now(UTC)
         # 应该在1分钟左右过期
         diff = (vc.expires_at - now).total_seconds()
         assert 0 < diff < 70
@@ -260,7 +260,7 @@ class TestVerificationCodeProperties:
         # 手动改过期时间到过去
         from datetime import datetime, timedelta, timezone
 
-        vc.expires_at = datetime.now(timezone.utc) - timedelta(seconds=1)
+        vc.expires_at = datetime.now(UTC) - timedelta(seconds=1)
         assert vc.is_expired is True
 
     def test_is_used_false_by_default(self):
@@ -278,7 +278,7 @@ class TestVerificationCodeProperties:
         vc = VerificationCode.create(recipient="u@test.com", code_type="email_bind", ttl_seconds=1)
         from datetime import datetime, timedelta, timezone
 
-        vc.expires_at = datetime.now(timezone.utc) - timedelta(seconds=1)
+        vc.expires_at = datetime.now(UTC) - timedelta(seconds=1)
         assert vc.is_valid is False
 
     def test_is_valid_used(self):