pr-from-difflisted

# PR from Diff A reviewer should understand the change without reading every line. Structure: - **What & why** — the problem and the approach, 2-3 sentences. - **Changes** — bullet the meaningful ones (skip noise like formatting). - **How to verify** — the exact steps/commands the reviewer runs to confirm it works. - **Risks / out of scope** — what could break, what you deliberately didn't do. - **Screenshots** for UI. Flag any decision the reviewer should weigh in on. Keep the PR small — if the diff is huge, say what could be split out. No "fixes stuff".