🐛 修正项目的代码警告 (#614)

* 🐛 调整ruff的pytest警告

* 🐛 调整导入关系警告

* 🐛 删除奇怪无用的赋值和取值逻辑

* ✅ 不同测试部分所用变量应加以区分

* 🐛 subs_io model添加默认值

* 🐛 修完所有的 ruff PT001 警告

* 🔧 按ruff建议修改ruff配置

warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `pyproject.toml`:
  - 'ignore' -> 'lint.ignore'
  - 'select' -> 'lint.select'

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

tests/theme/test_themes.py

@@ -22,19 +22,19 @@ raw_post_list_2 = raw_post_list_1 + [
 ]
 
 
-@pytest.fixture()
+@pytest.fixture
 def MERGEABLE_PNG_DATA() -> bytes:
     from tests.platforms.utils import get_bytes
 
     return get_bytes("mergeable-pic.jpg")
 
 
-@pytest.fixture()
+@pytest.fixture
 def SIMPLE_PNG_DATA() -> bytes:
     return b"\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x01\x00\x00\x00\x01\x08\x06\x00\x00\x00\x1f\x15\xc4\x89"
 
 
-@pytest.fixture()
+@pytest.fixture
 def mock_platform(app: App):
     from nonebot_bison.post import Post
     from nonebot_bison.types import Target, RawPost
@@ -81,7 +81,7 @@ def mock_platform(app: App):
     return MockPlatform
 
 
-@pytest.fixture()
+@pytest.fixture
 def mock_post(app: App, mock_platform):
     from nonebot_bison.post import Post
     from nonebot_bison.utils import ProcessContext, DefaultClientManager