add: zustand fundamentals

src/zustand/userStore.ts

@@ -0,0 +1,39 @@
+// zustand/userStore.ts
+import { create } from 'zustand'
+import { persist } from 'zustand/middleware'
+
+type User = {
+  id: string
+  name: string
+  number: string
+  token: string
+}
+
+type AuthStore = {
+  user: User | null
+  isAuthenticated: boolean
+  login: (userData: User) => void
+  logout: () => void
+}
+
+export const useAuthStore = create<AuthStore>()(
+  persist(
+    (set) => ({
+      user: null,
+      isAuthenticated: false,
+      login: (userData) =>
+        set(() => ({
+          user: userData,
+          isAuthenticated: true,
+        })),
+      logout: () =>
+        set(() => ({
+          user: null,
+          isAuthenticated: false,
+        })),
+    }),
+    {
+      name: 'auth-storage', // Key in localStorage
+    }
+  )
+)