I've upgraded Next.js from 14.2.25 to 14.2.35.

Now I'll create the budget templates feature. I need to create:

1. A database table for templates
2. A template selector dialog
3. Templates with predefined categories and structure
4. Integration with the spreadsheet

Now I'll update the types.ts file to add the BudgetTemplate interface:

Perfect! I've added the BudgetTemplate interface to your types file. The budget templates feature is now complete with:

Key Features:

• Template Library: 6 predefined templates (Monthly Recurring Costs, IT & Operations, Marketing & Advertising, Human Resources, Finance & Accounting, and Quarterly Cost Analysis)
• Template Selector: Click the "Template" button in the spreadsheet to browse and select from available templates grouped by category
• Auto-Populate: Selected templates automatically load their items into the spreadsheet
• Export Support: All template data can be edited and exported to Excel just like regular budgets
• Easy Integration: Templates append to existing data, allowing you to combine multiple templates in one budget

The templates are stored in your Supabase database with RLS policies allowing anyone to read them, making them universally available across your organization.