[完善] 样式完善

src/app/navigation/navigation.component.scss

@@ -37,10 +37,12 @@ mat-sidenav{
             width: 18px;
             height: 20px;
             vertical-align: middle;
+            cursor: pointer;
           }
           label {
             display: inline-block;
             vertical-align: middle;
+            cursor: pointer;
           }
         }
     }