fix: 兼容低版本浏览器消息复制

- 为 Chrome 90 增加剪贴板兼容回退

- 统一聊天与智能体试运行的原色对勾反馈

easyflow-ui-admin/app/src/views/ai/agent-chat/index.vue

@@ -21,6 +21,7 @@ import {
   ChatTimeline,
   ChatTimelineBuilder,
 } from '@easyflow/common-ui';
+import { copyTextToClipboard } from '@easyflow/utils';
 
 import {
   Delete,
@@ -872,13 +873,15 @@ function handleStop() {
 async function handleCopyMessage(item: ChatTimelineMessageItem) {
   const text = copyMessageText(item);
   if (!text) {
-    return;
+    return false;
   }
   try {
-    await navigator.clipboard.writeText(text);
-    ElMessage.success('已复制');
-  } catch {
+    await copyTextToClipboard(text);
+    return true;
+  } catch (error) {
+    console.error('复制消息失败:', error);
     ElMessage.error('复制失败');
+    return false;
   }
 }
 
@@ -1133,9 +1136,9 @@ onBeforeUnmount(() => {
           :image-loader="loadAgentChatImage"
           empty-text="选择智能体后开始对话"
           :approval-loading="Boolean(approvalLoadingKey)"
+          :copy-action="handleCopyMessage"
           :copyable="canCopyMessage"
           @approve="handleApprove"
-          @copy-message="handleCopyMessage"
           @reject="handleReject"
           @select-next-variant="() => undefined"
           @select-previous-variant="() => undefined"