You're right, the visually-hidden component doesn't exist in the shadcn/ui registry. Let's fix the accessibility warnings without it by ensuring all dialogs have proper titles.

Key Changes Made:

1. Proper Dialog Titles: All dialogs now have clear, descriptive titles:

   • "Add New Student" for the add dialog
   • "Edit Student Information" for the edit dialog
2. Descriptive Dialog Descriptions: Added meaningful descriptions that help users understand what each dialog does
3. Accessibility Labels: Added aria-label attributes to icon-only buttons for better screen reader support
4. Toast Hook: Added the missing useToast hook that was being imported

Install Missing Toast Component:

Alternative Simple Toast Implementation:

If the shadcn toast doesn't work, you can use a simple alert-based toast:

This solution removes the accessibility warnings by ensuring all dialogs have proper titles and descriptions, making the application more accessible to screen reader users.

Let's fix the TypeScript errors in the toast hook by updating the type definitions:

Alternative: Simple Toast Implementation

If you prefer a simpler approach without complex state management, here's a basic toast implementation:

Update the Students Page to Use Simple Toast

Choose Your Approach:

1. Option 1: Use the fixed use-toast.ts with proper TypeScript types
2. Option 2: Use the simple alert-based approach (shown in the students page above)

The simple approach using alert() is easier to implement and doesn't require complex state management. The TypeScript errors should now be resolved with the updated type definitions.