Fix ESLint config so lint runs

[digambernegi]

What

Fix the ESLint flat config import so the project’s lint command runs successfully.

Why

npm run lint was failing during config loading, so contributors could not verify code quality with the documented workflow.

Changes

• Updated eslint.config.mjs to import flat-config helpers from eslint/config
• Fixed one JSX comment text issue in app/page.tsx so lint passes cleanly

Verification

• npm run lint