first commit

client/src/lib/auth.ts

@@ -0,0 +1,35 @@
+const TOKEN_KEY = 'catstagram_token';
+const USER_KEY = 'catstagram_user';
+
+export interface User {
+  id: number;
+  username: string;
+  points: number;
+  created_at?: string;
+}
+
+export function getToken(): string | null {
+  return localStorage.getItem(TOKEN_KEY);
+}
+
+export function setToken(token: string): void {
+  localStorage.setItem(TOKEN_KEY, token);
+}
+
+export function getUser(): User | null {
+  const raw = localStorage.getItem(USER_KEY);
+  return raw ? JSON.parse(raw) : null;
+}
+
+export function setUser(user: User): void {
+  localStorage.setItem(USER_KEY, JSON.stringify(user));
+}
+
+export function clearAuth(): void {
+  localStorage.removeItem(TOKEN_KEY);
+  localStorage.removeItem(USER_KEY);
+}
+
+export function isAuthenticated(): boolean {
+  return !!getToken();
+}