dogfood-local

Runs the app on a local server and drives it in a real browser to judge rendered changes before they become pull requests. On any rendered-surface change traceable to prose requirements, a stakeholder email, or a mockup, run it BEFORE the review lanes, not after: hands-on use found three defects that four diff reviews missed, because the wrong code path looked right. Fires on a single frontend pass, and equally on a batch frontier of rendered-surface branches — dogfood the whole batch from one integration worktree instead of opening a PR per look. Replaces deciding on production.