mobile update

frontend/src/pages/Login.tsx

@@ -1,18 +1,62 @@
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
 import { authApi } from '../api/client';
+import { useStore } from '../store/useStore';
 import { Loader2, Wallet } from 'lucide-react';
 import { FcGoogle } from 'react-icons/fc';
 
+const isTauriEnv = () => typeof window !== 'undefined' && '__TAURI_INTERNALS__' in window;
+
+const DEEP_LINK_SCHEME = 'com.arrelin.family-budget-android://auth';
+
 export default function Login() {
   const { t } = useTranslation();
+  const { setUser } = useStore();
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState('');
 
+  useEffect(() => {
+    if (!isTauriEnv()) return;
+
+    let unlisten: (() => void) | null = null;
+
+    const setupDeepLink = async () => {
+      const { onOpenUrl } = await import('@tauri-apps/plugin-deep-link');
+      unlisten = await onOpenUrl(async (urls) => {
+        const url = Array.isArray(urls) ? urls[0] : urls;
+        if (!url.startsWith(DEEP_LINK_SCHEME)) return;
+
+        const token = new URL(url).searchParams.get('token');
+        if (!token) return;
+
+        try {
+          setLoading(true);
+          await authApi.mobileCallback(token);
+          const me = await authApi.me();
+          setUser(me.data);
+        } catch {
+          setError(t('login.authError'));
+          setLoading(false);
+        }
+      });
+    };
+
+    setupDeepLink();
+    return () => { unlisten?.(); };
+  }, []);
+
   const handleGoogleLogin = async () => {
     try {
       setLoading(true);
       setError('');
+
+      if (isTauriEnv()) {
+        const { open } = await import('@tauri-apps/plugin-shell');
+        const response = await authApi.getGoogleAuthUrl(undefined, true);
+        await open(response.data.url);
+        return;
+      }
+
       const currentUrl = window.location.origin;
       const response = await authApi.getGoogleAuthUrl(currentUrl);
       window.location.href = response.data.url;