feat: 로또 자율학습 탭 — 성적표·캘리브레이션·당첨조합 분석

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/api.js

@@ -740,6 +740,11 @@ export async function triggerEvolverEvaluate() {
     return r.json();
 }
 
+// --- Lotto Backtest ---
+export const lottoBacktestTrackRecord = ()         => apiGet('/api/lotto/backtest/track-record');
+export const lottoBacktestCalibration = (weeks=52) => apiGet(`/api/lotto/backtest/calibration?weeks=${weeks}`);
+export const lottoBacktestReview      = (drawNo)   => apiGet(`/api/lotto/backtest/review/${drawNo}`);
+
 // --- Tarot Lab ---
 
 export function tarotInterpret(body) {