Now let me check the backend-related files that need to be removed or simplified:

Now I'll clean up the project by removing backend integration files and creating a UI-only demo:

Now let me check the app pages to see what needs to be updated to be UI-only:

Now I'll update the pages to remove backend dependencies and make them UI-only with demo data. Let me start by creating simplified versions:

Now let me update the visualize page:

Now let me check and update the export page:

The export page looks good. Now let me update the page.tsx to remove API references:

I've successfully converted the DataNova project to a UI-only frontend without any backend dependencies. Here's what I removed and updated:

Changes Made:

Removed Backend Files:

• /lib/api-client.ts - Removed all API integration code
• /hooks/use-dataset.ts - Removed backend data management hook
• /BACKEND_INTEGRATION.md - Removed setup documentation
• /.env.local.example - Removed environment variables

Updated Pages to Use Demo Data:

1. Analyze Page (/app/analyze/page.tsx) - Now generates mock statistics with simulated file uploads instead of calling backend APIs
2. Summarize Page (/app/summarize/page.tsx) - Includes sample summaries (Executive, Technical, Business Insights) with a 2-second generation delay for demo UX
3. Visualize Page (/app/visualize/page.tsx) - Removed file ID dependency and uses sample column data for demonstrations
4. Export Page - Already UI-only, no changes needed

The project is now a pure frontend application with beautiful, functional UI components that showcase the design without requiring any backend services. All interactivity is local with demo data, making it perfect for showcasing the design and user experience.