feat: complete placement analysis workflow

src/lib/workers/score-optimizer.worker.ts

@@ -0,0 +1,33 @@
+/// <reference lib="webworker" />
+
+import { optimizeExactOrderAndCooldowns } from '../engine/index.ts';
+import type { ExactOptimizeOptions, ExactSongChart, OptimizerCard } from '../engine/index.ts';
+
+type OptimizeRequest = {
+  type: 'optimize-exact';
+  cards: OptimizerCard[];
+  chart: ExactSongChart;
+  perfectNoteScore: number;
+  directSongScoreBonusPercent?: number;
+};
+
+self.onmessage = (event: MessageEvent<OptimizeRequest>) => {
+  if (event.data.type !== 'optimize-exact') return;
+
+  try {
+    const options: ExactOptimizeOptions = {
+      perfectNoteScore: event.data.perfectNoteScore,
+      directSongScoreBonusPercent: event.data.directSongScoreBonusPercent,
+      onProgress: (progress) => self.postMessage({ type: 'progress', progress })
+    };
+    const result = optimizeExactOrderAndCooldowns(event.data.cards, event.data.chart, options);
+    self.postMessage({ type: 'result', result });
+  } catch (error) {
+    self.postMessage({
+      type: 'error',
+      message: error instanceof Error ? error.message : '분석 중 알 수 없는 오류가 발생했습니다.'
+    });
+  }
+};
+
+export {};