fixed some bugs on ios

ios/OralTrainer/Views/RootView.swift

@@ -90,6 +90,9 @@ struct RootView: View {
         .onChange(of: activeModule) { module in
             if module == .train {
                 controller.setContinuousPlayback(continuousPlayback)
+            } else if module == .test {
+                // 与安卓测试页一致：按当前句窗口播放，避免滑进下一句。
+                controller.setContinuousPlayback(false)
             } else {
                 controller.setContinuousPlayback(true)
             }