Expand linting for typescript

Apply the recommended rules from here: https://www.npmjs.com/package/@typescript-eslint/eslint-plugin

Look for the existing ESLint configuration file (likely .eslintrc.js or similar) in the project root. Review the current rules and compare them to the recommended set from the linked @typescript-eslint/eslint-plugin npm package. Add or modify the rules in the config file, then run the linting command (e.g., npm run lint) to see the new warnings/errors and ensure they are appropriate.

Written by the indexing model from the issue text.