fix(frontend): handle clipboard fallback and markdown word export

frontend-web/src/strategy-components/MarkdownRenderer.tsx

@@ -15,6 +15,7 @@ import sql from 'react-syntax-highlighter/dist/esm/languages/prism/sql';
 import tsx from 'react-syntax-highlighter/dist/esm/languages/prism/tsx';
 import typescript from 'react-syntax-highlighter/dist/esm/languages/prism/typescript';
 import { oneDark } from 'react-syntax-highlighter/dist/esm/styles/prism';
+import { copyTextToClipboard } from '@/core/clipboard';
 
 export interface WikiLinkTarget {
   target: string;
@@ -101,11 +102,11 @@ const CodeBlock: React.FC<{ children: React.ReactNode; className?: string }> = (
 
   const handleCopy = async () => {
     try {
-      await navigator.clipboard.writeText(codeText);
+      await copyTextToClipboard(codeText);
       setCopied(true);
       window.setTimeout(() => setCopied(false), 1500);
-    } catch (error) {
-      console.error('复制代码失败:', error);
+    } catch {
+      // The shared clipboard helper already tries the browser fallback.
     }
   };
 

frontend-web/src/strategy-components/components/chat-qa/GeneralQA.tsx

@@ -29,6 +29,7 @@ import {
 } from './GeneralQA.mock';
 import { requestCrudService } from '@/service/request-axios-service';
 import { authStorageGet } from '@/core/auth/scoped-storage';
+import { copyTextToClipboard } from '@/core/clipboard';
 
 /**
  * 通用问答组件
@@ -1763,9 +1764,9 @@ const GeneralQA: React.FC<{
   const handleCopyAssistantMessage = async (message: Message) => {
     const answerText = getAssistantAnswerText(message);
     try {
-      await navigator.clipboard.writeText(answerText);
-    } catch (copyError) {
-      console.error('复制模型回答失败:', copyError);
+      await copyTextToClipboard(answerText);
+    } catch {
+      // Keep the chat surface quiet when the browser blocks clipboard access.
     }
   };