From 4d3070e849620c543bf8c2b06dc0e6552908801f Mon Sep 17 00:00:00 2001
From: openapphub <openapphub@outlook.com>
Date: Wed, 6 May 2026 14:44:36 +0800
Subject: [PATCH] =?UTF-8?q?fix(web):=20=E5=85=BC=E5=AE=B9=20HTTP=20?=
 =?UTF-8?q?=E7=8E=AF=E5=A2=83=E5=A4=8D=E5=88=B6=E6=8C=89=E9=92=AE=20(#2712?=
 =?UTF-8?q?)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: openapphub <175949671+openapphub@users.noreply.github.com>
---
 .../src/components/chat/assistant-message.tsx | 33 +++++++++++++++++--
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/web/frontend/src/components/chat/assistant-message.tsx b/web/frontend/src/components/chat/assistant-message.tsx
index 07a3c0abc..157ca636f 100644
--- a/web/frontend/src/components/chat/assistant-message.tsx
+++ b/web/frontend/src/components/chat/assistant-message.tsx
@@ -56,11 +56,38 @@ export function AssistantMessage({
   const formattedTimestamp =
     timestamp !== "" ? formatMessageTime(timestamp) : ""
 
-  const handleCopy = () => {
-    navigator.clipboard.writeText(content).then(() => {
+  const handleCopy = async () => {
+    const markCopied = () => {
       setIsCopied(true)
       setTimeout(() => setIsCopied(false), 2000)
-    })
+    }
+
+    try {
+      if (navigator.clipboard?.writeText) {
+        await navigator.clipboard.writeText(content)
+        markCopied()
+        return
+      }
+    } catch {
+      // HTTP 或受限环境下可能不支持 Clipboard API，继续走降级方案
+    }
+
+    const textArea = document.createElement("textarea")
+    textArea.value = content
+    textArea.setAttribute("readonly", "")
+    textArea.style.position = "fixed"
+    textArea.style.left = "-9999px"
+    document.body.appendChild(textArea)
+    textArea.select()
+
+    try {
+      const copied = document.execCommand("copy")
+      if (copied) {
+        markCopied()
+      }
+    } finally {
+      document.body.removeChild(textArea)
+    }
   }
 
   const collapsedLabel = isThought