fix: 补齐其余 3 处任务轮询的服务断开容错

此前只有榜单更新一处做了处理（连续 3 次查询失败即提示并结束轮询）。
其余 3 处——app.js executeTask(通用 AI 任务)、data-pages 批量更新账号、视频解析——仍是 catch 后 continue，
服务被回收时会静默空转 15~35 分钟到超时，用户只看到按钮转圈。
现 4 处轮询口径统一。

project/短视频脚本创作/V1.0/mcn-workshop/public/app.js

@@ -80,9 +80,19 @@ async function executeTask(opts) {
   }
   // 轮询任务状态直到完成（最长 30 分钟，账号提炼等任务耗时较长）
   const deadline = Date.now() + 30 * 60 * 1000;
+  let pollFail = 0; // 10-08：服务断开时 api() 持续抛错，连续 3 次即提示并结束，避免静默空转到超时
   while (Date.now() < deadline) {
     await new Promise((r) => setTimeout(r, 5000));
-    try { s = await api('/api/run/status?id=' + encodeURIComponent(taskId)); } catch (e) { continue; }
+    try { s = await api('/api/run/status?id=' + encodeURIComponent(taskId)); pollFail = 0; }
+    catch (e) {
+      if (++pollFail >= 3) {
+        restore();
+        TaskProgress.hide();
+        showToast('⚠️ 工作台服务已断开（连续 3 次查询失败）；任务仍在后台执行，重启工作台后可继续查看');
+        return;
+      }
+      continue;
+    }
     if (s) TaskProgress.update(s, opts.label || '工作台任务');
     if (!s || s.state === 'notfound') { finished = true; finish(s || null); break; }
     if (s.state === 'done') { finished = true; finish(s); showToast('✅ 任务执行完成，页面已自动刷新'); refreshCurrentPage(); break; }

project/短视频脚本创作/V1.0/mcn-workshop/public/data-pages.js

@@ -1231,12 +1231,14 @@ function updateFollowedAccounts(btn) {
             const taskId = r.id;
             const taskTitle = '更新账号·' + name;
             TaskProgress.show(taskTitle);
+            let pollFail = 0; // 10-08：服务断开时连续 3 次查询失败即提示，避免静默空转
             const deadline = Date.now() + 20 * 60 * 1000;
             let state = 'running';
             while (Date.now() < deadline) {
               await new Promise((res) => setTimeout(res, 5000));
               let s = null;
-              try { s = await api('/api/run/status?id=' + encodeURIComponent(taskId)); } catch (e) { continue; }
+              try { s = await api('/api/run/status?id=' + encodeURIComponent(taskId)); pollFail = 0; }
+              catch (e) { if (++pollFail >= 3) { restore(); TaskProgress.hide(); showToast('⚠️ 工作台服务已断开（连续 3 次查询失败）；任务仍在后台执行'); return; } continue; }
               if (s) TaskProgress.update(s, taskTitle);
               if (!s || s.state === 'notfound') { state = 'done'; break; }
               if (s.state === 'done') { state = 'done'; break; }
@@ -1968,10 +1970,12 @@ function readVideoTaskRec(videoId) {
 async function watchVideoParseTask(videoId, taskId, reload) {
   let s = null;
   TaskProgress.show('视频解析');
+  let pollFail = 0; // 10-08：服务断开时连续 3 次查询失败即提示，避免静默空转
   const deadline = Date.now() + 35 * 60 * 1000;
   while (Date.now() < deadline) {
     await new Promise((r) => setTimeout(r, 5000));
-    try { s = await api('/api/run/status?id=' + encodeURIComponent(taskId)); } catch (e) { continue; }
+    try { s = await api('/api/run/status?id=' + encodeURIComponent(taskId)); pollFail = 0; }
+    catch (e) { if (++pollFail >= 3) { TaskProgress.hide(); showToast('⚠️ 工作台服务已断开（连续 3 次查询失败）；任务仍在后台执行'); return; } continue; }
     if (s) TaskProgress.update(s, '视频解析');
     if (!s || s.state === 'notfound' || s.state === 'done' || s.state === 'error' || s.state === 'review') break;
   }