리팩토링: 코드 최적화

store/gameStore.ts

@@ -10,7 +10,7 @@ import type {
   UserAnswer,
 } from "@/lib/engine/types";
 
-interface GameSession {
+export interface GameSession {
   problems: ParenthesisSignProblem[];
   currentIndex: number;
   results: (GradeResult | null)[];
@@ -22,10 +22,6 @@ interface GameState {
   submitAnswer: (answer: UserAnswer) => void;
   nextProblem: () => void;
   resetSession: () => void;
-  currentProblem: () => ParenthesisSignProblem | null;
-  currentResult: () => GradeResult | null;
-  isComplete: () => boolean;
-  score: () => { correct: number; total: number };
 }
 
 const DEFAULT_SESSION_COUNT = 10;
@@ -79,31 +75,4 @@ export const useGameStore = create<GameState>((set, get) => ({
   resetSession: () => {
     set({ session: createSession() });
   },
-  currentProblem: () => {
-    const { session } = get();
-
-    if (!session) return null;
-    return session.problems[session.currentIndex] ?? null;
-  },
-  currentResult: () => {
-    const { session } = get();
-
-    if (!session) return null;
-    return session.results[session.currentIndex] ?? null;
-  },
-  isComplete: () => {
-    const { session } = get();
-
-    return Boolean(session && session.currentIndex >= session.problems.length);
-  },
-  score: () => {
-    const { session } = get();
-
-    if (!session) return { correct: 0, total: 0 };
-
-    return {
-      correct: session.results.filter((result) => result?.correct).length,
-      total: session.problems.length,
-    };
-  },
 }));