feat: Introduce a new design system with dark mode and animations, add a reusable Tabs component, implement an Upload page, and create a backend API for team processes.

backend/internal/api/team_process.go

@@ -564,6 +564,16 @@ func processSingleTeam(idx int, req TeamProcessRequest) (result TeamProcessResul
 
 	if accountStatus.Status == "error" {
 		logger.Warning(fmt.Sprintf("%s 账户状态检查失败: %s，继续尝试", logPrefix, accountStatus.Error), owner.Email, "team")
+	} else if accountStatus.PlanType == "free" {
+		logger.Warning(fmt.Sprintf("%s 母号 plan 为 free，非 Team 账户，移除", logPrefix), owner.Email, "team")
+		if database.Instance != nil {
+			database.Instance.MarkOwnerAsInvalid(owner.Email)
+			database.Instance.DeleteTeamOwnerByEmail(owner.Email)
+			logger.Info(fmt.Sprintf("%s free 母号已删除: %s", logPrefix, owner.Email), owner.Email, "team")
+		}
+		result.Errors = append(result.Errors, "账户 plan 为 free，非 Team 账户")
+		result.DurationMs = time.Since(startTime).Milliseconds()
+		return result
 	} else {
 		logger.Info(fmt.Sprintf("%s 账户状态正常: %s", logPrefix, accountStatus.PlanType), owner.Email, "team")
 	}