Debugging Exercise (Intentionally Broken)

Run:

npm i
npm run dev

Look for:

• Security leaks (exposed secrets, XSS, unsafe eval, http URLs, tokens in query strings/localStorage).
• Vulnerable deps (npm audit). Suggest upgrades or removals.
• Anti-patterns (DOM manipulation via jQuery inside React, duplicated logic, derived state bugs, unbounded effects, memory leaks, mutation).
• Performance issues (heavy computations on render, useless re-renders, keys, list rendering, inline handlers in big lists, no memoization, N+1 fetching).
• Accessibility and UX issues (poor labels, bad focus, confusing CTAs, low contrast, misleading affordances).
• TypeScript smells (anys, ts-ignore, incorrect types, non-null assertions, union abuses, dead code).