What does this PR do?

This PR improves the stability of booking list items by preventing unnecessary unmount/remount cycles during re-renders, which was causing (avatar) flickering in the UI.

Changes:

1. Extracted confirmMutation.mutate to a stable reference to prevent the handleAccept callback from being recreated on every render
2. Added getRowId function to the table configuration to provide stable row identifiers, preventing React Table from unmounting and remounting rows unnecessarily

Visual Demo

No visual demo provided - this fix addresses flickering that occurs during booking list updates (e.g., when accepting/rejecting bookings).

Mandatory Tasks

• I have self-reviewed the code
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change - N/A (internal optimization, no API changes)
• I confirm automated tests are in place that prove my fix is effective or that my feature works - Note: This is a UI stability fix that's difficult to test automatically

How should this be tested?

1. Navigate to the bookings page with multiple bookings
2. Accept or reject a booking
3. Observe that the booking list items don't flicker or re-render unnecessarily
4. Verify that accepting/rejecting bookings still works correctly
5. Test with both data rows and separator rows in the list

Key areas to verify:

• No flickering when booking status changes
• Accept/reject functionality still works correctly
• Table rows maintain their state during updates

Human Review Checklist

Please pay special attention to:

• Row ID logic: Verify the getRowId function handles all possible row types (currently handles "data" and "separator" types)
• Mutation behavior: Confirm that extracting confirmMutation.mutate doesn't cause stale closure issues or break tRPC mutation behavior
• Dependency array: Verify the change from [confirmMutation] to [confirmMutationMutate] in the handleAccept callback is correct
• Visual testing: Test the booking list to confirm flickering is resolved when accepting/rejecting bookings

Link to Devin run: https://app.devin.ai/sessions/1987c587ca07434a8025f85eded434da
Requested by: [email protected] (@eunjae-lee)