feat: 长辈模式（大字大按钮 + 偏好按账号隔离）+ 语音输入（按住说话 + 实时转写 + 后端代理 DashScope ASR + 患者端专用）+ 健康仪表盘背景渐变

health_app/test/speech_input_test.dart

@@ -0,0 +1,39 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:health_app/providers/elder_mode_provider.dart';
+import 'package:health_app/services/realtime_speech_service.dart';
+
+void main() {
+  test('实时语音地址保留后端基础路径并切换为 WebSocket', () {
+    expect(
+      buildRealtimeSpeechEndpoint('http://192.168.1.34:5000').toString(),
+      'ws://192.168.1.34:5000/api/speech/realtime',
+    );
+    expect(
+      buildRealtimeSpeechEndpoint(
+        'https://erpapi.datalumina.cn/xiaomai/',
+      ).toString(),
+      'wss://erpapi.datalumina.cn/xiaomai/api/speech/realtime',
+    );
+  });
+
+  test('旧版长辈设置升级后默认启用语音输入', () {
+    final preferences = ElderModePreferences.fromJson({
+      'schemaVersion': 1,
+      'enabled': true,
+      'largeTextEnabled': true,
+    });
+
+    expect(preferences.voiceInputEnabled, isTrue);
+  });
+
+  test('长辈模式语音输入开关可以持久化', () {
+    const preferences = ElderModePreferences(
+      enabled: true,
+      voiceInputEnabled: false,
+    );
+    final restored = ElderModePreferences.fromJson(preferences.toJson());
+
+    expect(restored.enabled, isTrue);
+    expect(restored.voiceInputEnabled, isFalse);
+  });
+}