feat(Core/UI): 백테스트 전역 엔진 선택 버튼 추가 및 스캘핑 Rust 방어로직 포팅 1차 완료

scratch/fix_avg.js

@@ -0,0 +1,11 @@
+function formatWhipParam(r, k, prefix, suffix, dec, stats) {
+  if (r[k] == null) return null;
+  const v = Number(r[k]);
+  let text = `${prefix}${v.toFixed(dec)}${suffix}`;
+  if (!stats || !stats[k]) return text;
+  const s = stats[k];
+  const dist = Math.abs(v - s.avg);
+  const ratio = 1 - (dist / s.maxDist);
+  const alpha = 0.1 + (0.8 * ratio);
+  return `<span style="background:rgba(255, 165, 0, ${alpha.toFixed(2)}); color:${alpha > 0.4 ? '#000' : 'inherit'}; border-radius:3px; padding:0 2px;">${text}</span>`;
+}