add filter panel to calculator

lib/ui/app_shell.dart

@@ -84,8 +84,9 @@ class _MyAppState extends State<MyApp> {
       redirect: (context, state) {
         final loggedIn = auth.isLoggedIn;
         final loggingIn = state.uri.toString() == '/login';
+        final atSettings = state.uri.toString() == '/settings';
 
-        if (!loggedIn && !loggingIn) return '/login';
+        if (!loggedIn && !loggingIn && !atSettings) return '/login';
         if (loggedIn && loggingIn) return '/';
         return null;
       },
@@ -155,13 +156,13 @@ class _MyAppState extends State<MyApp> {
                 return NewEntryPage(editLegId: legId);
               },
             ),
-            GoRoute(
-              path: '/settings',
-              builder: (context, state) => const SettingsPage(),
-            ),
           ],
         ),
         GoRoute(path: '/login', builder: (context, state) => const LoginScreen()),
+        GoRoute(
+          path: '/settings',
+          builder: (context, state) => const SettingsPage(),
+        ),
       ],
     );
   }