feat: isolated duel

src/stores/duel.ts

@@ -0,0 +1,17 @@
+import { produce } from 'immer';
+import { create } from 'zustand';
+import { DuelMember } from './tankopedia';
+
+export interface Duel {
+  assigned: boolean;
+  protagonist?: DuelMember;
+  antagonist?: DuelMember;
+}
+
+export const useDuel = create<Duel>()(() => ({
+  assigned: false,
+}));
+
+export function mutateDuel(recipe: (draft: Duel) => void) {
+  useDuel.setState(produce(recipe));
+}