🐛 fix(chatModal): refactor error handling in WebSocket connection to improve readability and error handling

The error handling in the WebSocket connection has been refactored to improve readability and error handling. Instead of nesting the `getHealth()` promise inside the `onerror` callback, it has been extracted to a separate `.then()` block. This allows for better separation of concerns and makes the code more readable. Additionally, the error handling logic has been updated to properly set the `setErrorData` state when the backend fails to respond.