feat(douyu): 二维码弹窗增加复制二维码/复制链接按钮

- 新增 QrActions 组件：复制二维码图片、复制二维码链接（含 execCommand 降级）
- 精英宝典绑定/电竞手册/支付三个弹窗统一功能按钮在上、操作按钮在下

web/frontend/src/components/QrActions.tsx

@@ -0,0 +1,86 @@
+import { useState } from 'react';
+import type { RefObject } from 'react';
+import { Button, Space } from 'antd';
+import { CopyOutlined, LinkOutlined } from '@ant-design/icons';
+import { copyImageToClipboard } from '../utils/exchangeImage';
+import { getErrorMessage } from '../utils/error';
+import { message } from '../utils/antdMessage';
+
+interface Props {
+  wrapRef: RefObject<HTMLDivElement | null>;
+  url?: string;
+  disabled?: boolean;
+}
+
+function copyTextToClipboard(text: string): Promise<void> {
+  if (navigator.clipboard?.writeText) {
+    return navigator.clipboard.writeText(text);
+  }
+  // fallback：利用 textarea + execCommand，兼容 http 远程访问
+  return new Promise((resolve, reject) => {
+    const ta = document.createElement('textarea');
+    ta.value = text;
+    ta.style.position = 'fixed';
+    ta.style.left = '-9999px';
+    document.body.appendChild(ta);
+    ta.select();
+    try {
+      const ok = document.execCommand('copy');
+      document.body.removeChild(ta);
+      if (ok) {
+        resolve();
+      } else {
+        reject(new Error('execCommand copy failed'));
+      }
+    } catch (e) {
+      document.body.removeChild(ta);
+      reject(e);
+    }
+  });
+}
+
+export default function QrActions({ wrapRef, url, disabled }: Props) {
+  const [copyingImage, setCopyingImage] = useState(false);
+  const [copyingLink, setCopyingLink] = useState(false);
+
+  const copyImage = async () => {
+    const canvas = wrapRef.current?.querySelector('canvas');
+    if (!canvas) return;
+    setCopyingImage(true);
+    try {
+      const blob = await new Promise<Blob>((resolve, reject) => {
+        canvas.toBlob((b) => (b ? resolve(b) : reject(new Error('二维码图片导出失败'))), 'image/png');
+      });
+      await copyImageToClipboard(blob);
+      message.success('二维码已复制到剪贴板');
+    } catch (error) {
+      message.error(getErrorMessage(error));
+    } finally {
+      setCopyingImage(false);
+    }
+  };
+
+  const copyLink = async () => {
+    if (!url) return;
+    setCopyingLink(true);
+    try {
+      await copyTextToClipboard(url);
+      message.success('二维码链接已复制');
+    } catch (error) {
+      message.error(getErrorMessage(error));
+    } finally {
+      setCopyingLink(false);
+    }
+  };
+
+  return (
+    <Space size={8}>
+      <Button size="small" icon={<CopyOutlined />} loading={copyingImage} disabled={disabled} onClick={copyImage}>
+        复制二维码
+      </Button>
+      <Button size="small" icon={<LinkOutlined />} loading={copyingLink} disabled={disabled || !url} onClick={copyLink}>
+        复制链接
+      </Button>
+    </Space>
+  );
+}

web/frontend/src/pages/DouyuTasksPage.tsx

@@ -16,6 +16,7 @@ import {
   type DouyuTaskItem,
 } from '../api/modules';
 import ExchangeResultImage from '../components/ExchangeResultImage';
+import QrActions from '../components/QrActions';
 import { usePermissions } from '../hooks/usePermissions';
 import { useWebSocketLogs } from '../hooks/useWebSocketLogs';
 import {
@@ -279,6 +280,9 @@ export default function DouyuTasksPage({ handbook }: { handbook: HandbookKind })
   const [activeQrTaskId, setActiveQrTaskId] = useState<number | null>(null);
   const [esportsBindTask, setEsportsBindTask] = useState<DouyuTaskItem | null>(null);
   const [payTask, setPayTask] = useState<DouyuTaskItem | null>(null);
+  const qrCanvasWrapRef = useRef<HTMLDivElement | null>(null);
+  const esportsQrCanvasWrapRef = useRef<HTMLDivElement | null>(null);
+  const payQrCanvasWrapRef = useRef<HTMLDivElement | null>(null);
   const autoOpenedQrTaskIds = useRef<Set<number>>(new Set());
   const autoOpenedEsportsBindTaskIds = useRef<Set<number>>(new Set());
   const autoOpenedPayTaskIds = useRef<Set<number>>(new Set());
@@ -1608,13 +1612,16 @@ export default function DouyuTasksPage({ handbook }: { handbook: HandbookKind })
 
             {esportsQrUrl ? (
               <div style={{ textAlign: 'center' }}>
-                <QRCode value={esportsQrUrl} size={220} bordered={false} />
+                <div ref={esportsQrCanvasWrapRef}>
+                  <QRCode value={esportsQrUrl} size={220} bordered={false} />
+                </div>
                 <Text type="secondary" style={{ display: 'block', marginTop: 8 }}>
                   请在腾讯页面选择角色，完成后查询最新角色。
                 </Text>
               </div>
             ) : null}
 
+            <QrActions wrapRef={esportsQrCanvasWrapRef} url={esportsQrUrl} disabled={!esportsQrUrl} />
             <Space wrap>
               <Button
                 icon={<SearchOutlined />}
@@ -1693,7 +1700,9 @@ export default function DouyuTasksPage({ handbook }: { handbook: HandbookKind })
                 {qrStatusText}
               </Tag>
               {qrUrl ? (
-                <QRCode value={qrUrl} size={220} bordered={false} />
+                <div ref={qrCanvasWrapRef}>
+                  <QRCode value={qrUrl} size={220} bordered={false} />
+                </div>
               ) : qrBindReady ? (
                 <Text type="secondary">绑定二维码暂未返回</Text>
               ) : qrTask?.status === 'running' ? (
@@ -1701,6 +1710,7 @@ export default function DouyuTasksPage({ handbook }: { handbook: HandbookKind })
               ) : (
                 <Text type="secondary">本次未生成二维码</Text>
               )}
+              <QrActions wrapRef={qrCanvasWrapRef} url={qrUrl} disabled={!qrUrl} />
               {qrBindReady ? (
                 <>
                   <Tag color="gold" style={{ fontSize: 16, padding: '6px 16px' }}>
@@ -1774,10 +1784,13 @@ export default function DouyuTasksPage({ handbook }: { handbook: HandbookKind })
             )}
             <Space direction="vertical" align="center" size={12}>
               {payUrl ? (
-                <QRCode value={payUrl} size={220} bordered={false} />
+                <div ref={payQrCanvasWrapRef}>
+                  <QRCode value={payUrl} size={220} bordered={false} />
+                </div>
               ) : (
                 <Text type="secondary">支付码生成中...</Text>
               )}
+              <QrActions wrapRef={payQrCanvasWrapRef} url={payUrl} disabled={!payUrl} />
               <Text>{payTask.message || '请扫码支付'}</Text>
             </Space>
           </div>