feat: implement S2A authentication flow, Codex token management, and related utilities.

backend/internal/api/team_process.go

@@ -785,10 +785,14 @@ func processSingleTeam(idx int, req TeamProcessRequest) (result TeamProcessResul
 				return false
 			}
 			if attempt > 0 {
-				// 重试前等待一段时间，避免密集请求
+				// 重试前等待一段时间，避免密集请求（可被停止信号中断）
 				retryDelay := time.Duration(3+attempt*2) * time.Second
 				logger.Warning(fmt.Sprintf("%s 入库重试 (第%d次, 等待 %ds)", memberLogPrefix, attempt+1, int(retryDelay.Seconds())), memberEmail, "team")
-				time.Sleep(retryDelay)
+				select {
+				case <-time.After(retryDelay):
+				case <-teamProcessState.stopCh:
+					return false
+				}
 			}
 
 			// 每次尝试都从代理池获取新代理（避免复用失败代理）

frontend/src/hooks/useTeamStatus.ts

@@ -55,9 +55,9 @@ export function useTeamStatus(pollInterval = 3000) {
           const processData = data.data as TeamProcessStatus
           newStatus.isProcessing = processData.running
           newStatus.processingTeams = processData.running
-            ? processData.total_teams - processData.completed
+            ? Math.max(0, processData.total_teams - processData.completed)
             : 0
-          newStatus.processedTeams = processData.completed
+          newStatus.processedTeams = Math.min(processData.completed, processData.total_teams)
         }
       }