feat(platform): add source readiness handoff copy

vehicle-data-platform/apps/web/src/pages/Dashboard.tsx

@@ -765,6 +765,36 @@ export function Dashboard({
     ].filter(Boolean);
     copyText(lines.join('\n'), '运营交接摘要');
   };
+  const copySourceReadinessHandoff = () => {
+    const plan = sourceReadiness;
+    if (!plan?.sources?.length) {
+      Toast.warning('暂无数据源就绪度数据');
+      return;
+    }
+    const lines = [
+      '【三源接入到车辆服务交接摘要】',
+      `车辆规模：${formatCount(plan.onlineVehicles)} / ${formatCount(plan.totalVehicles)} 在线`,
+      `接入运行：连接 ${formatCount(plan.activeConnections)}；Redis 在线 Key ${formatCount(plan.redisOnlineKeys)}；Kafka Lag ${formatLag(plan.kafkaLag)}`,
+      `平台版本：${plan.platformRelease || '-'}`,
+      '',
+      ...plan.sources.map((item, index) => [
+        `${index + 1}. ${item.protocol} - ${item.status}`,
+        `   角色：${item.role}`,
+        `   在线：${formatCount(item.online)} / ${formatCount(item.total)}，在线率 ${item.onlineRate.toLocaleString(undefined, { maximumFractionDigits: 1 })}%`,
+        `   缺失车辆：${formatCount(item.missingVehicles)}`,
+        `   证据：${item.evidence}`,
+        `   动作：${item.action}`,
+        `   验收：${item.acceptance}`,
+        `   实时：${appURL(item.realtimeHash)}`,
+        `   车辆：${appURL(item.vehiclesHash)}`,
+        `   RAW：${appURL(item.historyHash)}`,
+        `   告警：${appURL(item.alertHash)}`
+      ].join('\n')),
+      '',
+      `驾驶舱：${appURL(buildAppHash({ page: 'dashboard' }))}`
+    ];
+    copyText(lines.join('\n'), '三源接入交接摘要');
+  };
   const copyScenarioBlueprint = () => {
     const lines = [
       '【车辆数据中台功能蓝图】',
@@ -965,7 +995,11 @@ export function Dashboard({
             <Button size="small" theme="light" type="primary" onClick={exportDashboardSnapshot}>导出驾驶舱 CSV</Button>
           </Space>
         </Card>
-        <Card bordered title="数据源到车辆服务就绪度" style={{ marginBottom: 16 }}>
+        <Card
+          bordered
+          title={<Space wrap><span>数据源到车辆服务就绪度</span><Button size="small" theme="light" disabled={!sourceReadiness?.sources?.length} onClick={copySourceReadinessHandoff}>复制接入交接</Button></Space>}
+          style={{ marginBottom: 16 }}
+        >
           <div className="vp-source-readiness-grid">
             {(sourceReadiness?.sources ?? []).map((item) => (
               <div key={item.protocol} className="vp-source-readiness-item">