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>

tests/test_integration.py

@@ -1,65 +1,66 @@
 """Integration tests for the full WikiJS client with Pages API."""
 
-import pytest
 from unittest.mock import Mock, patch
 
 from wikijs import WikiJSClient
 from wikijs.endpoints.pages import PagesEndpoint
-from wikijs.models.page import Page, PageCreate
+from wikijs.models.page import Page
 
 
 class TestWikiJSClientIntegration:
     """Integration tests for WikiJS client with Pages API."""
-    
+
     def test_client_has_pages_endpoint(self):
         """Test that client has pages endpoint initialized."""
-        with patch('wikijs.client.requests.Session'):
+        with patch("wikijs.client.requests.Session"):
             client = WikiJSClient("https://test.wiki", auth="test-key")
-            
-            assert hasattr(client, 'pages')
+
+            assert hasattr(client, "pages")
             assert isinstance(client.pages, PagesEndpoint)
             assert client.pages._client is client
-    
-    @patch('wikijs.client.requests.Session')
+
+    @patch("wikijs.client.requests.Session")
     def test_client_pages_integration(self, mock_session_class):
         """Test that pages endpoint works through client."""
         # Mock the session and response
         mock_session = Mock()
         mock_session_class.return_value = mock_session
-        
+
         mock_response = Mock()
         mock_response.ok = True
         mock_response.json.return_value = {
             "data": {
-                "pages": [{
-                    "id": 1,
-                    "title": "Test Page",
-                    "path": "test",
-                    "content": "Content",
-                    "isPublished": True,
-                    "isPrivate": False,
-                    "tags": [],
-                    "locale": "en",
-                    "createdAt": "2023-01-01T00:00:00Z",
-                    "updatedAt": "2023-01-01T00:00:00Z"
-                }]
+                "pages": [
+                    {
+                        "id": 1,
+                        "title": "Test Page",
+                        "path": "test",
+                        "content": "Content",
+                        "isPublished": True,
+                        "isPrivate": False,
+                        "tags": [],
+                        "locale": "en",
+                        "createdAt": "2023-01-01T00:00:00Z",
+                        "updatedAt": "2023-01-01T00:00:00Z",
+                    }
+                ]
             }
         }
         mock_session.request.return_value = mock_response
-        
+
         # Create client
         client = WikiJSClient("https://test.wiki", auth="test-key")
-        
+
         # Call pages.list() through client
         pages = client.pages.list()
-        
+
         # Verify it works
         assert len(pages) == 1
         assert isinstance(pages[0], Page)
         assert pages[0].title == "Test Page"
-        
+
         # Verify the request was made
         mock_session.request.assert_called_once()
         call_args = mock_session.request.call_args
         assert call_args[0][0] == "POST"  # GraphQL uses POST
-        assert "/graphql" in call_args[0][1]
+        assert "/graphql" in call_args[0][1]