[UI] ConfirmationModal.tsx disables all TypeScript checks via @ts-nocheck

Description

ui/components/ConfirmationModal.tsx has // @ts-nocheck at the top of the file, which disables all TypeScript type checking for the entire component.

File: ui/components/ConfirmationModal.tsx:1

// @ts-nocheck

Why This Is a Problem

@ts-nocheck suppresses all TypeScript errors in the file, defeating the purpose of using TypeScript. This means:

1. Type errors in this component pass silently and are only discovered at runtime
2. Incorrect prop types won't be caught during development
3. Refactors that change interfaces won't produce errors in this file
4. Code review cannot rely on TypeScript to catch regressions here

ConfirmationModal is used throughout the application as a shared component, making silent type errors here high-impact.

Expected Behavior

The @ts-nocheck directive should be removed and any underlying type errors should be properly resolved with correct TypeScript types.

Steps to Reproduce

1. Open ui/components/ConfirmationModal.tsx
2. Observe line 1: // @ts-nocheck

Suggested Fix

Remove // @ts-nocheck, address any TypeScript errors that surface, and add proper type annotations for props and state.