diff --git a/backend/internal/jobs/ordertimeout/job.go b/backend/internal/jobs/ordertimeout/job.go
index 35211f9..f8887dc 100644
--- a/backend/internal/jobs/ordertimeout/job.go
+++ b/backend/internal/jobs/ordertimeout/job.go
@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"hfb_sys/backend/internal/model"
+	"hfb_sys/backend/internal/modules/chat"
 	"hfb_sys/backend/internal/modules/notification"
 
 	"github.com/redis/go-redis/v9"
@@ -21,6 +22,12 @@ import (
 
 const orderTimeoutLockKey = "hfb:job:ordertimeout:lock"
 
+const (
+	defaultRenterRetentionDaysAfterOrderEnd = 5
+	minRenterRetentionDaysAfterOrderEnd     = 3
+	maxRenterRetentionDaysAfterOrderEnd     = 7
+)
+
 type Job struct {
 	db         *gorm.DB
 	redis      *redis.Client
@@ -35,6 +42,7 @@ type thresholds struct {
 	RenterConfirmTimeoutMinutes      int
 	ReturnOverdueGraceMinutes        int
 	OwnerReturnConfirmTimeoutMinutes int
+	RenterRetentionDaysAfterOrderEnd int
 }
 
 func New(db *gorm.DB, redisClient *redis.Client, logger *zap.Logger) *Job {
@@ -130,6 +138,7 @@ func (j *Job) run(ctx context.Context) {
 		j.handleRenterConfirmTimeout,
 		j.handleReturnOverdue,
 		j.handleOwnerReturnConfirmTimeout,
+		j.handleEndedOrderRenterRetention,
 	}
 	total := 0
 	for _, handler := range handlers {
@@ -152,6 +161,7 @@ func (j *Job) loadThresholds(ctx context.Context) (thresholds, error) {
 		RenterConfirmTimeoutMinutes:      30,
 		ReturnOverdueGraceMinutes:        10,
 		OwnerReturnConfirmTimeoutMinutes: 120,
+		RenterRetentionDaysAfterOrderEnd: defaultRenterRetentionDaysAfterOrderEnd,
 	}
 	var rows []model.SystemConfig
 	err := j.db.WithContext(ctx).
@@ -161,6 +171,7 @@ func (j *Job) loadThresholds(ctx context.Context) (thresholds, error) {
 			"order.pending_payment_timeout_minutes",
 			"order.return_overdue_grace_minutes",
 			"handoff.owner_return_confirm_timeout_minutes",
+			"chat.renter_retention_days_after_order_end",
 		}).
 		Find(&rows).Error
 	if err != nil {
@@ -182,11 +193,23 @@ func (j *Job) loadThresholds(ctx context.Context) (thresholds, error) {
 			cfg.ReturnOverdueGraceMinutes = value
 		case "handoff.owner_return_confirm_timeout_minutes":
 			cfg.OwnerReturnConfirmTimeoutMinutes = value
+		case "chat.renter_retention_days_after_order_end":
+			cfg.RenterRetentionDaysAfterOrderEnd = clampRenterRetentionDays(value)
 		}
 	}
 	return cfg, nil
 }
 
+func clampRenterRetentionDays(value int) int {
+	if value < minRenterRetentionDaysAfterOrderEnd {
+		return minRenterRetentionDaysAfterOrderEnd
+	}
+	if value > maxRenterRetentionDaysAfterOrderEnd {
+		return maxRenterRetentionDaysAfterOrderEnd
+	}
+	return value
+}
+
 func (j *Job) handlePendingPaymentTimeout(ctx context.Context, now time.Time, cfg thresholds) (int, error) {
 	if cfg.PendingPaymentTimeoutMinutes <= 0 {
 		return 0, nil
@@ -483,6 +506,71 @@ func (j *Job) handleOwnerReturnConfirmTimeout(ctx context.Context, now time.Time
 	return count, nil
 }
 
+func (j *Job) handleEndedOrderRenterRetention(ctx context.Context, now time.Time, cfg thresholds) (int, error) {
+	retentionDays := clampRenterRetentionDays(cfg.RenterRetentionDaysAfterOrderEnd)
+	deadline := now.AddDate(0, 0, -retentionDays)
+	var rows []model.RentalOrder
+	err := j.db.WithContext(ctx).
+		Table("rental_orders AS o").
+		Select("o.*").
+		Joins("JOIN chat_conversations AS c ON c.listing_id = o.listing_id AND c.type = ?", chat.ConversationTypeListingGroup).
+		Joins("JOIN chat_participants AS cp ON cp.conversation_id = c.id AND cp.participant_type = ? AND cp.participant_id = o.renter_id AND cp.role = ?", "user", "renter").
+		Where("o.status IN ?", []string{"completed", "cancelled", "closed"}).
+		Where("o.settled_at IS NOT NULL AND o.settled_at <= ?", deadline).
+		Order("o.id ASC").
+		Limit(100).
+		Find(&rows).Error
+	if err != nil {
+		return 0, err
+	}
+	count := 0
+	for _, row := range rows {
+		removed := false
+		if err := j.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+			var order model.RentalOrder
+			if err := tx.Clauses(clause.Locking{Strength: "UPDATE"}).First(&order, row.ID).Error; err != nil {
+				return err
+			}
+			if !isEndedOrderStatus(order.Status) {
+				return nil
+			}
+			if order.SettledAt == nil || order.SettledAt.After(deadline) {
+				return nil
+			}
+			var err error
+			removed, err = chat.RemoveRenterFromListingConversation(tx, order.ListingID, order.RenterID)
+			if err != nil {
+				return err
+			}
+			if !removed {
+				return nil
+			}
+			return appendAuditLog(tx, "chat.renter_retention.remove", order.ID, map[string]any{
+				"order_id":       order.ID,
+				"order_no":       order.OrderNo,
+				"listing_id":     order.ListingID,
+				"renter_id":      order.RenterID,
+				"retention_days": retentionDays,
+			})
+		}); err != nil {
+			return count, err
+		}
+		if removed {
+			count++
+		}
+	}
+	return count, nil
+}
+
+func isEndedOrderStatus(status string) bool {
+	switch status {
+	case "completed", "cancelled", "closed":
+		return true
+	default:
+		return false
+	}
+}
+
 func (j *Job) updateOrder(ctx context.Context, orderID uint64, action string, fn func(*gorm.DB, *model.RentalOrder) (string, error)) error {
 	return j.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
 		var order model.RentalOrder
diff --git a/backend/internal/jobs/ordertimeout/job_test.go b/backend/internal/jobs/ordertimeout/job_test.go
new file mode 100644
index 0000000..696265c
--- /dev/null
+++ b/backend/internal/jobs/ordertimeout/job_test.go
@@ -0,0 +1,169 @@
+package ordertimeout
+
+import (
+	"testing"
+	"time"
+
+	"hfb_sys/backend/internal/model"
+	"hfb_sys/backend/internal/modules/chat"
+
+	"go.uber.org/zap"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+func setupOrderTimeoutTestDB(t *testing.T) *gorm.DB {
+	t.Helper()
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{
+		Logger: logger.Default.LogMode(logger.Silent),
+	})
+	if err != nil {
+		t.Fatalf("无法创建测试数据库: %v", err)
+	}
+	if err := db.AutoMigrate(
+		&model.RentalOrder{},
+		&model.ChatConversation{},
+		&model.ChatParticipant{},
+		&model.ChatMessage{},
+		&model.SystemConfig{},
+		&model.AuditLog{},
+	); err != nil {
+		t.Fatalf("数据库迁移失败: %v", err)
+	}
+	return db
+}
+
+func TestHandleEndedOrderRenterRetention(t *testing.T) {
+	db := setupOrderTimeoutTestDB(t)
+	job := New(db, nil, zap.NewNop())
+	now := time.Date(2026, 6, 18, 12, 0, 0, 0, time.UTC)
+
+	oldSettledAt := now.AddDate(0, 0, -6)
+	recentSettledAt := now.AddDate(0, 0, -2)
+	oldOrder := model.RentalOrder{
+		OrderNo:   "ORDER-OLD",
+		ListingID: 101,
+		AccountID: 201,
+		OwnerID:   301,
+		RenterID:  401,
+		Status:    "completed",
+		SettledAt: &oldSettledAt,
+	}
+	recentOrder := model.RentalOrder{
+		OrderNo:   "ORDER-RECENT",
+		ListingID: 102,
+		AccountID: 202,
+		OwnerID:   302,
+		RenterID:  402,
+		Status:    "completed",
+		SettledAt: &recentSettledAt,
+	}
+	if err := db.Create(&oldOrder).Error; err != nil {
+		t.Fatalf("创建旧订单失败: %v", err)
+	}
+	if err := db.Create(&recentOrder).Error; err != nil {
+		t.Fatalf("创建新订单失败: %v", err)
+	}
+
+	oldConv := model.ChatConversation{
+		ListingID: &oldOrder.ListingID,
+		Type:      chat.ConversationTypeListingGroup,
+		Title:     "旧发布群",
+		Status:    "active",
+	}
+	recentConv := model.ChatConversation{
+		ListingID: &recentOrder.ListingID,
+		Type:      chat.ConversationTypeListingGroup,
+		Title:     "新发布群",
+		Status:    "active",
+	}
+	if err := db.Create(&oldConv).Error; err != nil {
+		t.Fatalf("创建旧会话失败: %v", err)
+	}
+	if err := db.Create(&recentConv).Error; err != nil {
+		t.Fatalf("创建新会话失败: %v", err)
+	}
+	participants := []model.ChatParticipant{
+		{ConversationID: oldConv.ID, ParticipantType: "user", ParticipantID: oldOrder.RenterID, Role: "renter", JoinedAt: oldSettledAt},
+		{ConversationID: recentConv.ID, ParticipantType: "user", ParticipantID: recentOrder.RenterID, Role: "renter", JoinedAt: recentSettledAt},
+	}
+	if err := db.Create(&participants).Error; err != nil {
+		t.Fatalf("创建成员失败: %v", err)
+	}
+
+	count, err := job.handleEndedOrderRenterRetention(t.Context(), now, thresholds{
+		RenterRetentionDaysAfterOrderEnd: 5,
+	})
+	if err != nil {
+		t.Fatalf("清退任务失败: %v", err)
+	}
+	if count != 1 {
+		t.Fatalf("清退数量 = %d, want 1", count)
+	}
+
+	var oldCount int64
+	if err := db.Model(&model.ChatParticipant{}).
+		Where("conversation_id = ? AND participant_id = ? AND role = ?", oldConv.ID, oldOrder.RenterID, "renter").
+		Count(&oldCount).Error; err != nil {
+		t.Fatalf("统计旧租客失败: %v", err)
+	}
+	if oldCount != 0 {
+		t.Fatalf("旧租客成员数 = %d, want 0", oldCount)
+	}
+
+	var recentCount int64
+	if err := db.Model(&model.ChatParticipant{}).
+		Where("conversation_id = ? AND participant_id = ? AND role = ?", recentConv.ID, recentOrder.RenterID, "renter").
+		Count(&recentCount).Error; err != nil {
+		t.Fatalf("统计新租客失败: %v", err)
+	}
+	if recentCount != 1 {
+		t.Fatalf("新租客成员数 = %d, want 1", recentCount)
+	}
+
+	var auditCount int64
+	if err := db.Model(&model.AuditLog{}).
+		Where("action = ?", "chat.renter_retention.remove").
+		Count(&auditCount).Error; err != nil {
+		t.Fatalf("统计清退审计失败: %v", err)
+	}
+	if auditCount != 1 {
+		t.Fatalf("清退审计数 = %d, want 1", auditCount)
+	}
+
+	count, err = job.handleEndedOrderRenterRetention(t.Context(), now, thresholds{
+		RenterRetentionDaysAfterOrderEnd: 5,
+	})
+	if err != nil {
+		t.Fatalf("重复清退任务失败: %v", err)
+	}
+	if count != 0 {
+		t.Fatalf("重复清退数量 = %d, want 0", count)
+	}
+
+	if err := db.Model(&model.AuditLog{}).
+		Where("action = ?", "chat.renter_retention.remove").
+		Count(&auditCount).Error; err != nil {
+		t.Fatalf("重复统计清退审计失败: %v", err)
+	}
+	if auditCount != 1 {
+		t.Fatalf("重复清退审计数 = %d, want 1", auditCount)
+	}
+}
+
+func TestClampRenterRetentionDays(t *testing.T) {
+	tests := []struct {
+		value int
+		want  int
+	}{
+		{value: 1, want: 3},
+		{value: 5, want: 5},
+		{value: 9, want: 7},
+	}
+	for _, tt := range tests {
+		if got := clampRenterRetentionDays(tt.value); got != tt.want {
+			t.Fatalf("clampRenterRetentionDays(%d) = %d, want %d", tt.value, got, tt.want)
+		}
+	}
+}
diff --git a/backend/internal/modules/chat/listing_group.go b/backend/internal/modules/chat/listing_group.go
index 717eb48..8bbdebf 100644
--- a/backend/internal/modules/chat/listing_group.go
+++ b/backend/internal/modules/chat/listing_group.go
@@ -150,7 +150,8 @@ func AddRenterToListingConversation(tx *gorm.DB, listingID uint64, renterID uint
 		ParticipantType: "user",
 		ParticipantID:   renterID,
 		Role:            "renter",
-		JoinedAt:        now, // 关键: 记录加入时间,用于消息可见性过滤
+		JoinedAt:        now,
+		LastReadAt:      &now,
 	}
 
 	if err := tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&participant).Error; err != nil {
@@ -183,17 +184,17 @@ func AddRenterToListingConversation(tx *gorm.DB, listingID uint64, renterID uint
 	return sendSystemMessage(tx, conv.ID, message)
 }
 
-// RemoveRenterFromListingConversation 移出租客
-func RemoveRenterFromListingConversation(tx *gorm.DB, listingID uint64, renterID uint64) error {
+// RemoveRenterFromListingConversation 移出租客，返回是否真的删除了租客成员记录。
+func RemoveRenterFromListingConversation(tx *gorm.DB, listingID uint64, renterID uint64) (bool, error) {
 	// 1. 查找发布群
 	var conv model.ChatConversation
 	err := tx.Where("listing_id = ?", listingID).First(&conv).Error
 	if err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			// 无发布群,跳过
-			return nil
+			return false, nil
 		}
-		return err
+		return false, err
 	}
 
 	// 2. 删除租客参与者记录
@@ -202,16 +203,19 @@ func RemoveRenterFromListingConversation(tx *gorm.DB, listingID uint64, renterID
 		Delete(&model.ChatParticipant{})
 
 	if result.Error != nil {
-		return result.Error
+		return false, result.Error
 	}
 
 	// 3. 发系统消息(如果确实删除了)
 	if result.RowsAffected > 0 {
 		message := "订单已结束，租客已退出群聊"
-		return sendSystemMessage(tx, conv.ID, message)
+		if err := sendSystemMessage(tx, conv.ID, message); err != nil {
+			return false, err
+		}
+		return true, nil
 	}
 
-	return nil
+	return false, nil
 }
 
 // 辅助函数
diff --git a/backend/internal/modules/chat/message.go b/backend/internal/modules/chat/message.go
index 34ae252..94ee54b 100644
--- a/backend/internal/modules/chat/message.go
+++ b/backend/internal/modules/chat/message.go
@@ -14,15 +14,11 @@ func (r *Repository) Messages(ctx context.Context, principal Principal, conversa
 	page, pageSize = normalizePagination(page, pageSize)
 	db := r.db.WithContext(ctx)
 
-	var participant *model.ChatParticipant
-
 	// 管理员可以查看任意会话的消息，普通用户需要是 participant
 	if principal.Type != "admin" {
-		p, err := r.findParticipant(db, principal, conversationID, false)
-		if err != nil {
+		if _, err := r.findParticipant(db, principal, conversationID, false); err != nil {
 			return nil, err
 		}
-		participant = p
 	} else {
 		// 管理员需要验证会话存在
 		var count int64
@@ -37,11 +33,6 @@ func (r *Repository) Messages(ctx context.Context, principal Principal, conversa
 	// 构建查询
 	query := db.Model(&model.ChatMessage{}).Where("conversation_id = ?", conversationID)
 
-	// 租客只能看到加入时间之后的消息
-	if principal.Type == "user" && participant != nil && participant.Role == "renter" {
-		query = query.Where("created_at >= ?", participant.JoinedAt)
-	}
-
 	var total int64
 	if err := query.Count(&total).Error; err != nil {
 		return nil, err
diff --git a/backend/internal/modules/order/checkout_finalize.go b/backend/internal/modules/order/checkout_finalize.go
index c2341f5..fc5f707 100644
--- a/backend/internal/modules/order/checkout_finalize.go
+++ b/backend/internal/modules/order/checkout_finalize.go
@@ -4,7 +4,6 @@ import (
 	"time"
 
 	"hfb_sys/backend/internal/model"
-	"hfb_sys/backend/internal/modules/chat"
 	"hfb_sys/backend/internal/modules/notification"
 	"hfb_sys/backend/internal/modules/wallet"
 
@@ -40,12 +39,6 @@ func (r *Repository) finalizeCheckout(tx *gorm.DB, order *model.RentalOrder, che
 		return nil, err
 	}
 
-	// 订单完成,移出租客
-	if err := chat.RemoveRenterFromListingConversation(tx, listing.ID, order.RenterID); err != nil {
-		// 移出失败不阻塞订单完成,仅记录日志
-		// TODO: 添加日志
-	}
-
 	return refund, nil
 }
 
diff --git a/backend/internal/modules/order/lifecycle.go b/backend/internal/modules/order/lifecycle.go
index c2201bf..60ade5b 100644
--- a/backend/internal/modules/order/lifecycle.go
+++ b/backend/internal/modules/order/lifecycle.go
@@ -244,8 +244,10 @@ func (r *Repository) Cancel(ctx context.Context, userID uint64, orderID uint64)
 		}
 
 		beforeStatus := order.Status
+		now := time.Now()
 		order.Status = orderStatusCancelled
 		order.HandoffStatus = handoffStatusCancelled
+		order.SettledAt = &now
 		orderID := order.ID
 		if beforeStatus == orderStatusPendingHandoff {
 			totalCent := order.RentAmountCent + order.DepositAmountCent
@@ -280,13 +282,6 @@ func (r *Repository) Cancel(ctx context.Context, userID uint64, orderID uint64)
 			return err
 		}
 
-		// 订单取消,移出租客(仅付款后取消需要移出)
-		if beforeStatus == orderStatusPendingHandoff {
-			if err := chat.RemoveRenterFromListingConversation(tx, listing.ID, order.RenterID); err != nil {
-				// 移出失败不阻塞订单取消
-			}
-		}
-
 		if err := tx.Save(&order).Error; err != nil {
 			return err
 		}
diff --git a/backend/internal/modules/systemconfig/repository.go b/backend/internal/modules/systemconfig/repository.go
index 24c7db4..7223039 100644
--- a/backend/internal/modules/systemconfig/repository.go
+++ b/backend/internal/modules/systemconfig/repository.go
@@ -38,6 +38,7 @@ var defaultConfigs = []defaultConfig{
 	{Key: "chat.default_support_admin_id", Value: "2", Description: "默认客服 ID（必须是启用状态的客服角色）"},
 	{Key: "chat.auto_welcome_message", Value: "欢迎加入订单群聊！如有任何问题，请随时沟通。", Description: "建群后自动发送的欢迎话术"},
 	{Key: "chat.listing_group_welcome", Value: "欢迎加入账号群！请号主扫描下方二维码加入企业微信群，方便客服与您及时联系。", Description: "发布群创建后自动发送的欢迎语"},
+	{Key: "chat.renter_retention_days_after_order_end", Value: "5", Description: "订单结束后租客保留在发布群的天数（3-7）"},
 	{Key: homeAnnouncementsConfigKey, Value: defaultHomeAnnouncementsConfigValue(), Description: "移动端首页公告 JSON 数组"},
 	{Key: homeBannersConfigKey, Value: defaultHomeBannersConfigValue(), Description: "移动端首页轮播图 JSON 数组"},
 	{Key: publishOptionsConfigKey, Value: defaultPublishOptionsConfigValue(), Description: "发布页选项配置 JSON"},
@@ -48,6 +49,7 @@ var adminVisibleConfigKeys = []string{
 	"chat.auto_welcome_message",
 	"chat.default_support_admin_id",
 	"chat.listing_group_welcome",
+	"chat.renter_retention_days_after_order_end",
 	"handoff.owner_return_confirm_timeout_minutes",
 	"handoff.owner_submit_timeout_minutes",
 	"handoff.renter_confirm_timeout_minutes",
diff --git a/backend/migrations/000011_chat_support_groups.sql b/backend/migrations/000011_chat_support_groups.sql
index 37f2227..b649d70 100644
--- a/backend/migrations/000011_chat_support_groups.sql
+++ b/backend/migrations/000011_chat_support_groups.sql
@@ -54,6 +54,11 @@ WHERE g.code IN ('owner_onboarding', 'renter_handoff')
   AND r.code = 'cs'
   AND au.status = 'active';
 
+INSERT INTO system_configs (`key`, `value`, description) VALUES
+('chat.renter_retention_days_after_order_end', '5', '订单结束后租客保留在发布群的天数（3-7）')
+ON DUPLICATE KEY UPDATE
+  description = VALUES(description);
+
 -- +goose StatementEnd
 
 -- +goose Down
@@ -65,5 +70,6 @@ DELETE rp FROM role_permissions rp
 JOIN permissions p ON p.id = rp.permission_id
 WHERE p.code = 'chat:manage';
 DELETE FROM permissions WHERE code = 'chat:manage';
+DELETE FROM system_configs WHERE `key` = 'chat.renter_retention_days_after_order_end';
 
 -- +goose StatementEnd
diff --git a/frontend/src/features/admin/views/AdminSystemConfigsView.vue b/frontend/src/features/admin/views/AdminSystemConfigsView.vue
index cf90650..5c5b368 100644
--- a/frontend/src/features/admin/views/AdminSystemConfigsView.vue
+++ b/frontend/src/features/admin/views/AdminSystemConfigsView.vue
@@ -102,6 +102,9 @@ const autoWelcomeConfig = computed(
 const listingGroupWelcomeConfig = computed(
   () => configs.value.find(item => item.key === 'chat.listing_group_welcome') || null
 )
+const renterRetentionConfig = computed(
+  () => configs.value.find(item => item.key === 'chat.renter_retention_days_after_order_end') || null
+)
 
 const regularConfigs = computed(() =>
   configs.value.filter(
@@ -114,7 +117,8 @@ const regularConfigs = computed(() =>
       item.key !== 'order.agreements' &&
       item.key !== 'profile.post_rental_notice' &&
       item.key !== 'chat.auto_welcome_message' &&
-      item.key !== 'chat.listing_group_welcome'
+      item.key !== 'chat.listing_group_welcome' &&
+      item.key !== 'chat.renter_retention_days_after_order_end'
   )
 )
 
@@ -200,6 +204,8 @@ function openEdit(row: SystemConfig) {
     agreementsVisible.value = true
   } else if (row.key === 'profile.post_rental_notice') {
     postRentalNoticeVisible.value = true
+  } else if (row.key === 'chat.renter_retention_days_after_order_end') {
+    generalVisible.value = true
   } else {
     generalVisible.value = true
   }
@@ -560,6 +566,39 @@ function formatConfigValue(row: SystemConfig) {
       </div>
     </section>
 
+    <section v-if="renterRetentionConfig" class="publish-config-panel">
+      <div class="publish-config-main">
+        <div>
+          <p class="eyebrow">Chat Retention</p>
+          <h2>发布群租客保留天数</h2>
+          <span>订单结束后，租客在发布群中保留的天数，超时后由后台任务自动移出。</span>
+        </div>
+        <el-button type="primary" @click="openEdit(renterRetentionConfig)">编辑天数</el-button>
+      </div>
+      <div class="publish-stat-grid home-stat-grid">
+        <div class="publish-stat">
+          <strong>{{ renterRetentionConfig.value }}</strong>
+          <span>当前天数</span>
+        </div>
+        <div class="publish-stat">
+          <strong>范围</strong>
+          <span>3-7 天</span>
+        </div>
+        <div class="publish-stat">
+          <strong>任务</strong>
+          <span>订单结束后自动清退</span>
+        </div>
+        <div class="publish-stat">
+          <strong>键</strong>
+          <span>{{ renterRetentionConfig.key }}</span>
+        </div>
+        <div class="publish-stat">
+          <strong>更新</strong>
+          <span>{{ formatHomeConfigStatus(renterRetentionConfig, '未初始化') }}</span>
+        </div>
+      </div>
+    </section>
+
     <el-table v-loading="loading" class="table-panel" :data="regularConfigs">
       <el-table-column prop="key" label="配置项" min-width="260" />
       <el-table-column label="当前值" min-width="180" show-overflow-tooltip>
diff --git a/frontend/src/shared/utils/systemConfigOptions.ts b/frontend/src/shared/utils/systemConfigOptions.ts
index 4ebd6cb..ce7217c 100644
--- a/frontend/src/shared/utils/systemConfigOptions.ts
+++ b/frontend/src/shared/utils/systemConfigOptions.ts
@@ -53,6 +53,11 @@ export const systemConfigSelectOptions: Record<string, SystemConfigOption[]> = {
     { label: '管理员 ID 2', value: '2' },
     { label: '管理员 ID 3', value: '3' },
   ],
+  'chat.renter_retention_days_after_order_end': [
+    { label: '3 天', value: '3' },
+    { label: '5 天', value: '5' },
+    { label: '7 天', value: '7' },
+  ],
 }
 
 export function getSystemConfigSelectOptions(key: string) {