index

mobile/context/AuthContext.jsx

@@ -0,0 +1,27 @@
+import { createContext, useCallback, useContext, useMemo, useState } from 'react';
+
+const AuthContext = createContext(null);
+
+export function AuthProvider({ children }) {
+  const [user, setUser] = useState(null);
+
+  const signIn = useCallback(async (token, profile) => {
+    setUser({ token, profile });
+  }, []);
+
+  const signOut = useCallback(() => {
+    setUser(null);
+  }, []);
+
+  const value = useMemo(() => ({ user, signIn, signOut }), [user, signIn, signOut]);
+
+  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
+}
+
+export function useAuth() {
+  const ctx = useContext(AuthContext);
+  if (!ctx) {
+    throw new Error('useAuth must be used within an AuthProvider');
+  }
+  return ctx;
+}