Refactor test files for improved readability and consistency

- Removed unnecessary blank lines and adjusted formatting in test files.
- Ensured consistent use of commas in function calls and assertions across various test cases.
- Updated import statements for better organization and clarity.
- Enhanced mock setups in tests for better isolation and reliability.
- Improved assertions to follow a consistent style for better readability.

tests/services/test_socket_service.py

@@ -98,7 +98,7 @@ class TestSocketManager:
     @patch("app.services.socket.extract_access_token_from_cookies")
     @patch("app.services.socket.JWTUtils.decode_access_token")
     async def test_connect_handler_success(
-        self, mock_decode, mock_extract_token, socket_manager, mock_sio
+        self, mock_decode, mock_extract_token, socket_manager, mock_sio,
     ):
         """Test successful connection with valid token."""
         # Setup mocks
@@ -133,7 +133,7 @@ class TestSocketManager:
     @pytest.mark.asyncio
     @patch("app.services.socket.extract_access_token_from_cookies")
     async def test_connect_handler_no_token(
-        self, mock_extract_token, socket_manager, mock_sio
+        self, mock_extract_token, socket_manager, mock_sio,
     ):
         """Test connection with no access token."""
         # Setup mocks
@@ -167,7 +167,7 @@ class TestSocketManager:
     @patch("app.services.socket.extract_access_token_from_cookies")
     @patch("app.services.socket.JWTUtils.decode_access_token")
     async def test_connect_handler_invalid_token(
-        self, mock_decode, mock_extract_token, socket_manager, mock_sio
+        self, mock_decode, mock_extract_token, socket_manager, mock_sio,
     ):
         """Test connection with invalid token."""
         # Setup mocks
@@ -202,7 +202,7 @@ class TestSocketManager:
     @patch("app.services.socket.extract_access_token_from_cookies")
     @patch("app.services.socket.JWTUtils.decode_access_token")
     async def test_connect_handler_missing_user_id(
-        self, mock_decode, mock_extract_token, socket_manager, mock_sio
+        self, mock_decode, mock_extract_token, socket_manager, mock_sio,
     ):
         """Test connection with token missing user ID."""
         # Setup mocks