Add a switch to turn off or remove AI features for Unlimited users and hide related icons

Dear developer, I'm sure you'll take care of users who bought the Unlimited version. They may not need the AI features, but the AI-related tool icons take up some screen space and can easily be clicked by accident, causing some interference. I believe everyone wants an uninterrupted, immersive handwriting note-taking experience, which is crucial for users. I hope you'll consider this suggestion! Let's work together to make Notewise even better!