新增加dashboard，修改首页

src/store/getters.js

@@ -12,9 +12,10 @@ const getters = {
   roles: state => state.user.roles,
   permissions: state => state.user.permissions,
   permission_routes: state => state.permission.routes,
-	userinfo: state => state.user.userInfo,
-  topbarRouters:state => state.permission.topbarRouters,
-  defaultRoutes:state => state.permission.defaultRoutes,
-  sidebarRouters:state => state.permission.sidebarRouters,
+  userinfo: state => state.user.userInfo,
+  topbarRouters: state => state.permission.topbarRouters,
+  defaultRoutes: state => state.permission.defaultRoutes,
+  sidebarRouters: state => state.permission.sidebarRouters,
+  onlineUserNum: state => 0
 }
 export default getters