修复默认值问题

src/business/platform/form/formrender/dynamic-form/dynamic-form.vue

@@ -346,7 +346,7 @@ export default {
     // }
   },
   async beforeMount() {
-    const { appendTitle } = (await getSetting('system')) || {
+    const { appendTitle = true } = (await getSetting('system')) || {
       appendTitle: true
     }
     if (appendTitle) {