bug fixes

src/components/learnSysLayout/navigation.vue

@@ -21,6 +21,8 @@
       :visible.sync="dialogVisible"
       :center="true"
       :append-to-body="true"
+      :close-on-click-modal="false"
+      :close-on-press-escape="false"
       @close="handleClose"
     >
       <div class="sign">