DG load plan

app.js, the result message posted once per Grade. v8 diff: 38 lines added, 2 removed.

// Rules come from data/matrix.json, verified by the SME.
const rules = DG.data;

function grade(state) {
  const gaps = rules.pairs
    .filter(p => p.kind === 'S')
    .filter(p => !clearDeck(state, p.a, p.b, rules.gapMetres) && !inDevice(state, p));
  const placards = missingPlacards(state, rules.placards);
  const score = Math.max(0, 10 - gaps.length - placards.length);
  return { score, max: 10, gaps, placards };
}

ui.grade.addEventListener('click', () => {
  const r = grade(state);
  // The LMS re-scores from `evidence` with the same matrix.
  window.parent.postMessage({
    type: 'result', version: 'v8',
    score: r.score, max: r.max, passed: r.score >= rules.passMark,
    evidence: { scenario: state.scenario, placements: state.placements, placards: state.placards, gaps: r.gaps }
  }, DG.parentOrigin);
});