登录按钮防重复点击：任务运行期间禁用开始登录和重试按钮

web/frontend/src/pages/LoginTasksPage.tsx

@@ -36,6 +36,7 @@ export default function LoginTasksPage() {
   const [selectedIds, setSelectedIds] = useState<number[]>([]);
   const [tasks, setTasks] = useState<LoginTaskItem[]>([]);
   const [loading, setLoading] = useState(false);
+  const [starting, setStarting] = useState(false);
   const [batchId, setBatchId] = useState<string | null>(null);
   const [selectedTags, setSelectedTags] = useState<string[]>([]);
   const [concurrency, setConcurrency] = useState(() => {
@@ -136,6 +137,7 @@ export default function LoginTasksPage() {
       message.warning('请选择账号');
       return;
     }
+    setStarting(true);
     setLoading(true);
     try {
       const result = await loginApi.createBatch({
@@ -146,11 +148,12 @@ export default function LoginTasksPage() {
       message.success(`已创建登录任务，共 ${result.count} 个账号`);
 
       connectLogs(`/api/login/ws/login/${result.batch_id}`, {
-        onClose: () => setBatchId(null),
+        onClose: () => { setBatchId(null); setStarting(false); },
-        onResult: () => setBatchId(null),
+        onResult: () => { setBatchId(null); setStarting(false); },
       });
     } catch (e: unknown) {
       message.error(getErrorMessage(e));
+      setStarting(false);
     } finally {
       setLoading(false);
     }
@@ -343,7 +346,7 @@ export default function LoginTasksPage() {
               icon={<PlayCircleOutlined />}
               loading={loading}
               onClick={handleBatchLogin}
-              disabled={selectedIds.length === 0 || wsConnected}
+              disabled={selectedIds.length === 0 || starting}
               size="small"
             >
               开始登录
@@ -380,6 +383,7 @@ export default function LoginTasksPage() {
               icon={<ReloadOutlined />}
               onClick={handleRetryFailed}
               loading={loading}
+              disabled={starting}
             >
               重试失败 ({failedCount})
             </Button>