Code Review Buddy Before I Open a PR

Language or framework: [e.g. TypeScript / React / Python] What this code is supposed to do in one sentence: [GOAL] Code or diff: [PASTE] Review like a senior who likes teaching: 1) Does it match the goal? If not, where it drifts. 2) Readability: naming, structure, anything confusing. 3) Edge cases: nulls, empty lists, slow inputs, race conditions if relevant. 4) Security or privacy smells if any (even mild ones). 5) 3 concrete refactors, ordered by impact. 6) If you are guessing, label guesses clearly. Do not rewrite the whole file unless I ask — keep feedback scannable.