fix(auth): 登录注册与手机号登录键盘避让

test/auth/phone_auth_sheet_test.dart

@@ -2,6 +2,7 @@
 
 import 'dart:convert';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:fruitshorts/core/data/remote/api_client.dart';
@@ -97,6 +98,38 @@ void main() {
     expect(find.text('Enter a valid phone number'), findsOneWidget);
     expect(adapter.requests, isEmpty);
   });
+
+  testWidgets('should_keep_code_above_ios_keyboard', (tester) async {
+    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+    addTearDown(() => debugDefaultTargetPlatformOverride = null);
+    tester.view.physicalSize = const Size(390, 844);
+    tester.view.devicePixelRatio = 1;
+    tester.view.viewInsets = const FakeViewPadding(bottom: 300);
+    addTearDown(tester.view.resetPhysicalSize);
+    addTearDown(tester.view.resetDevicePixelRatio);
+    addTearDown(tester.view.resetViewInsets);
+    final adapter = FakeHttpAdapter(
+      (_) async => FakeHttpResponse(
+        jsonEncode({'code': 0, 'message': 'ok', 'data': null}),
+      ),
+    );
+    final auth = AuthController(
+      AuthApi(ApiClient(baseUrl: 'http://127.0.0.1:8081', adapter: adapter)),
+      AuthSessionStore(),
+    );
+    await _pumpHost(tester, auth);
+    await tester.tap(find.byKey(const Key('open-phone-sheet')));
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byKey(const Key('auth-phone-code')));
+    await tester.pumpAndSettle();
+
+    expect(
+      tester.getBottomLeft(find.byKey(const Key('auth-phone-code'))).dy,
+      lessThanOrEqualTo(844 - 300),
+    );
+    debugDefaultTargetPlatformOverride = null;
+  });
 }
 
 Future<void> _pumpHost(WidgetTester tester, AuthController auth) {