React Native Expo app — full mobile client

- Expo SDK 54, expo-router, NativeWind
- 7 screens: login, tasks, calendar, goals, chat, settings, tabs
- API client (api.hasdo.info), SecureStore auth, AuthContext
- Tab navigation: Ukoly, Kalendar, Cile, Chat, Nastaveni
- Pull-to-refresh, FAB, group colors, priority dots
- Calendar grid with task dots
- AI chat with keyboard avoiding
- Web export verified (780 modules, 1.5MB bundle)
- Bundle ID: info.hasdo.taskteam

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mobile/lib/useAuth.ts

@@ -0,0 +1,44 @@
+import { useState, useEffect, useCallback } from 'react';
+import { getToken, setToken, removeToken, getUser, setUser, removeUser } from './auth';
+import * as api from './api';
+
+export function useAuth() {
+  const [token, setTokenState] = useState<string | null>(null);
+  const [user, setUserState] = useState<any>(null);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    (async () => {
+      const t = await getToken();
+      const u = await getUser();
+      setTokenState(t);
+      setUserState(u);
+      setLoading(false);
+    })();
+  }, []);
+
+  const loginFn = useCallback(async (email: string, password: string) => {
+    const res = await api.login({ email, password });
+    await setToken(res.data.token);
+    await setUser(res.data.user);
+    setTokenState(res.data.token);
+    setUserState(res.data.user);
+  }, []);
+
+  const registerFn = useCallback(async (email: string, name: string, password: string) => {
+    const res = await api.register({ email, name, password });
+    await setToken(res.data.token);
+    await setUser(res.data.user);
+    setTokenState(res.data.token);
+    setUserState(res.data.user);
+  }, []);
+
+  const logout = useCallback(async () => {
+    await removeToken();
+    await removeUser();
+    setTokenState(null);
+    setUserState(null);
+  }, []);
+
+  return { token, user, loading, login: loginFn, register: registerFn, logout };
+}