fix subTitle empty issue，添加设置页面

lib/src/views/info_view.dart

@@ -74,7 +74,7 @@ class _InfoViewState extends State<InfoView>
             children: [
               Text(title),
               Text(
-                subTitle,
+                subTitle ?? '',
                 style: TextStyle(fontSize: 22),
                 maxLines: 2,
                 overflow: TextOverflow.ellipsis,
@@ -89,7 +89,7 @@ class _InfoViewState extends State<InfoView>
   _buildTile(String title, String subTitle) {
     return ListTile(
       title: Text(title),
-      subtitle: Text(subTitle),
+      subtitle: Text(subTitle ?? ''),
       onLongPress: () {
         Clipboard.setData(ClipboardData(text: subTitle));
         Scaffold.of(context).showSnackBar(SnackBar(content: Text('已复制')));

lib/src/views/settings_view.dart

@@ -10,6 +10,15 @@ class SettingsView extends StatefulWidget {
 class _SettingsViewState extends State<SettingsView> {
   @override
   Widget build(BuildContext context) {
-    return ListView();
+    return ListView(
+      children: [
+        SwitchListTile(
+          title: Text('终端日志'),
+          subtitle: Text(''),
+          value: false,
+          onChanged: (state) {},
+        ),
+      ],
+    );
   }
 }