[QUALITY] Fix broken lint infrastructure - ESLint missing from devDependencies

[Shooksie]

Problem

The npm run lint command is broken and fails with sh: eslint: command not found.

Root Cause:

• package.json defines lint script but ESLint is NOT in devDependencies
• No .eslintrc configuration file exists

Impact

• No automated code quality checks in development or CI
• Code style violations go undetected
• 87 merged PRs in 7 days without lint verification

Solution

1. npm install --save-dev eslint @typescript-eslint/eslint-plugin @typescript-eslint/parser eslint-config-prettier
2. Create .eslintrc.json configuration
3. Verify: npm run lint works
4. Add linting GitHub Actions workflow

Audit Date: 2026-03-20