fix(admin): 平台推送地址优先回显已配置的公网域名

- 引入 resolveDouyinMashidaPublicOrigin 从已配置的 claimLinkBase/certLink 提取公网域名
- 更新后台面板 message_url 展示逻辑，即使从 localhost 访问也清晰呈现已配置的公网推送地址
- 向平台订阅推送时使用已解析的公网域名，避免错误推送 localhost
- 补充前端单元测试并通过全量构建校验

apps/frontend/src/pages/admin/platform/DouyinMashidaPanel.tsx

@@ -53,6 +53,7 @@ import {
   describeMessageTemplateWarning,
   describeMissingConfigFields,
   isLocalDevBaseUrl,
+  resolveDouyinMashidaPublicOrigin,
 } from '@/utils/douyin-mashida'
 
 const { Text, Paragraph } = Typography
@@ -155,9 +156,14 @@ export function DouyinMashidaPanel() {
   async function handleSubscribe(disable = false) {
     setSubscribing(true)
     try {
-      const targetUrl = buildDouyinMashidaMessageUrl(window.location.origin)
+      const targetOrigin = resolveDouyinMashidaPublicOrigin(
+        config.claimLinkBase,
+        config.certLink,
+        window.location.origin,
+      )
+      const targetUrl = buildDouyinMashidaMessageUrl(targetOrigin)
       await subscribeAdminDouyinMashidaPush({
-        publicUrl: window.location.origin,
+        publicUrl: targetOrigin,
         messageUrl: targetUrl,
         topics: config.handledTopics,
         disable,
@@ -216,7 +222,13 @@ export function DouyinMashidaPanel() {
     certLink: config.certLink,
   })
   const isLocalDev = isLocalDevBaseUrl(config.baseUrl)
-  const messageUrl = buildDouyinMashidaMessageUrl(window.location.origin)
+  const publicOrigin = resolveDouyinMashidaPublicOrigin(
+    config.claimLinkBase,
+    config.certLink,
+    window.location.origin,
+  )
+  const messageUrl = buildDouyinMashidaMessageUrl(publicOrigin)
+  const isMessageUrlLocal = isLocalDevBaseUrl(publicOrigin)
   const claimLinkPreview = buildDouyinMashidaClaimLinkPreview(config.claimLinkBase)
   const claimLinkWarning = describeClaimLinkBaseWarning(config.claimLinkBase)
   const messageTemplateWarning = describeMessageTemplateWarning(config.messageTemplate)
@@ -314,14 +326,28 @@ export function DouyinMashidaPanel() {
 
           {/* 平台推送回调地址展示 */}
           <div style={{ marginTop: 12, paddingTop: 10, borderTop: '1px dashed #e8e8e8' }}>
-            <Space wrap align="center">
-              <Text type="secondary" style={{ fontSize: 13 }}>
-                平台侧消息推送地址 (message_url)：
-              </Text>
-              <Text code copyable={{ text: messageUrl }} style={{ fontSize: 13 }}>
-                {messageUrl}
-              </Text>
-            </Space>
+            <Row gutter={[8, 8]} align="middle">
+              <Col xs={24} lg={6}>
+                <Space>
+                  <SendOutlined style={{ color: '#1677ff' }} />
+                  <Text strong style={{ fontSize: 13 }}>
+                    平台侧消息推送地址 (message_url)：
+                  </Text>
+                </Space>
+              </Col>
+              <Col xs={24} lg={18}>
+                <Space wrap align="center">
+                  <Text code copyable={{ text: messageUrl }} style={{ fontSize: 13, fontWeight: 500 }}>
+                    {messageUrl}
+                  </Text>
+                  {isMessageUrlLocal ? (
+                    <Tag color="warning">⚠️ 当前为本地地址，请在下方配置公网域名后订阅</Tag>
+                  ) : (
+                    <Tag color="success">✅ 公网推送就绪</Tag>
+                  )}
+                </Space>
+              </Col>
+            </Row>
           </div>
         </Card>