// Minimal localStorage for the store modules (createStore persists to it).
// Enough for get/set/remove/clear; synchronous, in-memory, per test process.
if (typeof globalThis.localStorage === 'undefined') {
  const store = new Map();
  globalThis.localStorage = {
    getItem: (k) => (store.has(k) ? store.get(k) : null),
    setItem: (k, v) => void store.set(String(k), String(v)),
    removeItem: (k) => void store.delete(k),
    clear: () => void store.clear(),
    key: (i) => [...store.keys()][i] ?? null,
    get length() {
      return store.size;
    },
  };
}