Add Android download icon to login

frontend/src/pages/auth/LoginPage.jsx

@@ -1,7 +1,7 @@
 import { useState } from 'react';
 import { useNavigate, Link } from 'react-router-dom';
 import { useAuth } from '../../contexts/AuthContext';
-import { PenTool } from 'lucide-react';
+import { Download, PenTool } from 'lucide-react';
 import toast from 'react-hot-toast';
 
 export default function LoginPage() {
@@ -57,6 +57,7 @@ export default function LoginPage() {
             {loading ? 'Ingresando...' : 'Iniciar sesión'}
           </button>
           <a className="btn btn-secondary btn-full auth-download-btn" href={androidApkUrl}>
+            <Download size={14} />
             Descargar app Android
           </a>
         </form>