修改1.4.0版本的UI

dify_1.4.0/web/app/components/base/iframe-postmessage.tsx

@@ -0,0 +1,80 @@
+'use client'
+import { useEffect, useRef } from 'react'
+
+/**
+ * IframePostMessage
+ * 页面加载完成后向父页面发送一次消息，并每 5 秒发送一次。
+ * 仅当当前窗口运行在 iframe 中时才发送。
+ */
+const IframePostMessage = () => {
+  const initializedRef = useRef(false)
+
+  /**
+   * sendMessage
+   * 向父页面发送消息的函数：收集当前页面的 localStorage 全量键值并发送。
+   * 如果不在 iframe 环境中则不发送。
+   */
+  const sendMessage = () => {
+    try {
+      if (typeof window === 'undefined') return
+      // 只在 iframe 环境下发送
+      if (window.parent === window) return
+      // 收集 localStorage 全量数据
+      const localStorageData: Record<string, string | null> = {}
+      try {
+        const { localStorage } = window
+        for (let i = 0; i < localStorage.length; i++) {
+          const key = localStorage.key(i)
+          if (!key) continue
+          localStorageData[key] = localStorage.getItem(key)
+        }
+      }
+      catch {
+        // 可能因浏览器隐私设置导致不可访问 localStorage
+      }
+      window.parent.postMessage(
+        {
+          type: 'dify-localstorage',
+          status: 1,
+          message: '将智能体本地缓存发送给父页面!',
+          data: localStorageData,
+        },
+        '*',
+      )
+    }
+    catch {
+      // 忽略跨域或其他运行时错误
+    }
+  }
+
+  useEffect(() => {
+    if (initializedRef.current) return
+    initializedRef.current = true
+
+    let timer: number | undefined
+
+    const init = () => {
+      sendMessage()
+      timer = window.setInterval(sendMessage, 5000)
+    }
+
+    if (document.readyState === 'loading') {
+      const onReady = () => {
+        init()
+        document.removeEventListener('DOMContentLoaded', onReady)
+      }
+      document.addEventListener('DOMContentLoaded', onReady)
+    }
+    else {
+      init()
+    }
+
+    return () => {
+      if (timer) window.clearInterval(timer)
+    }
+  }, [])
+
+  return null
+}
+
+export default IframePostMessage