Fix code formatting and linting issues

- Updated GitHub Actions workflow to use correct flake8 configuration
- Fixed line length issues by using 88 characters as configured
- Removed unused imports and trailing whitespace
- Fixed f-string placeholders and unused variables
- All linting checks now pass with project configuration

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

wikijs/auth/__init__.py

@@ -9,13 +9,13 @@ Supported authentication methods:
 - No authentication for testing (NoAuth)
 """
 
-from .base import AuthHandler, NoAuth
 from .api_key import APIKeyAuth
+from .base import AuthHandler, NoAuth
 from .jwt import JWTAuth
 
 __all__ = [
     "AuthHandler",
-    "NoAuth", 
+    "NoAuth",
     "APIKeyAuth",
     "JWTAuth",
-]
+]