web/frpc: support virtual net visitor plugin (#5414)

web/frpc/src/views/VisitorEdit.vue

@@ -107,6 +107,18 @@ const formRules: FormRules = {
       trigger: 'blur',
     },
   ],
+  pluginDestinationIP: [
+    {
+      validator: (_rule, value, callback) => {
+        if (form.value.pluginType === 'virtual_net' && !value?.trim()) {
+          callback(new Error('Destination IP is required for virtual_net'))
+          return
+        }
+        callback()
+      },
+      trigger: 'blur',
+    },
+  ],
 }
 
 const goBack = () => {