feat: restructure notification services

frontend/src/tests/vitest.setup.ts

@@ -0,0 +1,43 @@
+function createMemoryStorage(): Storage {
+  const store = new Map<string, string>()
+
+  return {
+    get length() {
+      return store.size
+    },
+    clear() {
+      store.clear()
+    },
+    getItem(key: string) {
+      return store.get(String(key)) ?? null
+    },
+    key(index: number) {
+      return Array.from(store.keys())[index] ?? null
+    },
+    removeItem(key: string) {
+      store.delete(String(key))
+    },
+    setItem(key: string, value: string) {
+      store.set(String(key), String(value))
+    },
+  }
+}
+
+function installStorage(name: 'localStorage' | 'sessionStorage') {
+  const storage = createMemoryStorage()
+
+  Object.defineProperty(globalThis, name, {
+    value: storage,
+    configurable: true,
+  })
+
+  if (typeof window !== 'undefined') {
+    Object.defineProperty(window, name, {
+      value: storage,
+      configurable: true,
+    })
+  }
+}
+
+installStorage('localStorage')
+installStorage('sessionStorage')