front & back: getting ready for user auth

frontend/app/store/user-store.js

@@ -0,0 +1,31 @@
+"use client";
+import { create } from "zustand";
+import { getJWT, setJWT, removeJWT, getMe } from "@/app/api/api-utils";
+import { endpoints } from "@/app/api/config";
+
+export const useUserStore = create((set, get) => ({
+  isAuth: false,
+  user: null,
+  token: null,
+  login: (user, token) => {
+    set({ isAuth: true, user, token });
+    setJWT(token);
+  },
+  logout: () => {
+    set({ isAuth: false, user: null, token: null });
+    removeJWT();
+  },
+  checkAuth: async (user_id) => {
+    const jwt = getJWT();
+    if (jwt) {
+      const me = await getMe(`${endpoints.profile}/${user_id}`, jwt);
+      if (me.is_my_profile) {
+        get().login(me, jwt);
+      } else {
+        get().logout();
+      }
+    } else {
+      get().logout();
+    }
+  },
+}));