Initial Setup & Model Download

[MitPete]

As a user, I want the extension to download necessary AI models so that it can categorize my browsing history accurately.

✅ Acceptance Criteria

• The extension should automatically download AI models (Transformers.js) upon first activation.
• Display a progress indicator so users know the model is being downloaded.
• Show a notification once the model is ready for use.
• If a model download fails, provide an option to retry.

📌 Tasks

• Implement automatic model downloading in the background script.
• Display a loading indicator during model download.
• Implement error handling and retry logic.
• Show a success message when the model is ready.

📝 Notes

• Ensure models are downloaded only once per device.
• Store downloaded models in IndexedDB for offline use.