feat(team_process): Add pause mechanism for consecutive zero S2A entries

- Implement pause/resume mechanism using sync.Cond to halt worker goroutines
- Add consecutive zero S2A counter to detect when no accounts are added for 2+ teams
- Trigger automatic 1-minute pause when consecutive zero entries detected
- Log warning messages with team details when pause is triggered
- Reset counter on successful S2A entries or when pause completes
- Allow stop signal to interrupt pause period for graceful shutdown
- Broadcast resume signal to all waiting workers after pause completes
- Prevents resource exhaustion and provides recovery time during low-activity periods

backend/internal/api/team_process.go

@@ -389,6 +389,11 @@ func runTeamProcess(req TeamProcessRequest) {
 	taskChan := make(chan int, totalOwners)
 	resultChan := make(chan TeamProcessResult, totalOwners)
 
+	// 连续入库为0的暂停机制
+	var pauseMu sync.Mutex
+	pauseCond := sync.NewCond(&pauseMu)
+	paused := false
+
 	var wg sync.WaitGroup
 
 	// 启动 worker
@@ -400,6 +405,13 @@ func runTeamProcess(req TeamProcessRequest) {
 				if isStopped() {
 					return
 				}
+				// 检查是否处于暂停状态，等待恢复
+				pauseMu.Lock()
+				for paused {
+					pauseCond.Wait()
+				}
+				pauseMu.Unlock()
+
 				result := processSingleTeam(idx, req)
 				resultChan <- result
 				atomic.AddInt32(&teamProcessState.Completed, 1)
@@ -428,6 +440,9 @@ func runTeamProcess(req TeamProcessRequest) {
 		close(resultChan)
 	}()
 
+	// 连续入库为0的计数器
+	consecutiveZeroS2A := 0
+
 	// 收集结果并统计
 	for result := range resultChan {
 		teamProcessState.mu.Lock()
@@ -438,6 +453,40 @@ func runTeamProcess(req TeamProcessRequest) {
 		totalAddedToS2A += result.AddedToS2A
 		allErrors = append(allErrors, result.Errors...)
 
+		// 检测连续入库为0的情况
+		if result.AddedToS2A == 0 {
+			consecutiveZeroS2A++
+			if consecutiveZeroS2A >= 2 {
+				logger.Warning(fmt.Sprintf("⚠ 连续 %d 个 Team 入库数为 0 (最近: Team %d - %s)，暂停 1 分钟后继续...",
+					consecutiveZeroS2A, result.TeamIndex, result.OwnerEmail), "", "team")
+
+				// 设置暂停标志，阻止 worker 取新任务
+				pauseMu.Lock()
+				paused = true
+				pauseMu.Unlock()
+
+				// 等待 1 分钟（可被停止信号中断）
+				select {
+				case <-time.After(1 * time.Minute):
+					logger.Info("暂停结束，恢复批量处理...", "", "team")
+				case <-teamProcessState.stopCh:
+					logger.Warning("暂停期间收到停止信号，终止处理", "", "team")
+				}
+
+				// 恢复 worker
+				pauseMu.Lock()
+				paused = false
+				pauseMu.Unlock()
+				pauseCond.Broadcast()
+
+				// 重置计数器
+				consecutiveZeroS2A = 0
+			}
+		} else {
+			// 入库不为0，重置连续计数
+			consecutiveZeroS2A = 0
+		}
+
 		// 保存单个Team结果到数据库
 		if database.Instance != nil && batchID > 0 {
 			dbResult := database.BatchTeamResult{