Offline Usage & Caching

[MitPete]

As a user, I want the extension to work offline after initial setup so that I can access my categorized browsing history anytime.

✅ Acceptance Criteria

• Ensure browsing history remains accessible when offline.
• Store categorized data in IndexedDB for local access.
• Use cached AI model if an internet connection is unavailable.
• Provide an option to manually refresh history when online.

📌 Tasks

• Store categorized history locally using IndexedDB.
• Implement a fallback mode when offline.
• Ensure AI models remain functional without internet access.
• Display a sync button to manually refresh data when online.

📝 Notes

• Use IndexedDB and local storage to cache history data.
• Show a clear offline mode indicator in the UI.