fix: acknowledge unsupported broadcast member removal

services/activity-service/internal/service/broadcast/service.go

@@ -222,6 +222,13 @@ func (s *Service) RemoveRegionBroadcastMember(ctx context.Context, userID int64,
 		return "", false, xerr.New(xerr.InvalidArgument, err.Error())
 	}
 	if err := s.publisher.DeleteGroupMember(ctx, groupID, userID); err != nil {
+		var restErr tencentim.RESTError
+		if errors.As(err, &restErr) && restErr.Code == 10007 && strings.Contains(strings.ToLower(restErr.Info), "disable kick member") {
+			// 区域播报群是 AVChatRoom，腾讯 IM 明确不允许服务端踢成员。用户换区依靠客户端
+			// 离开旧群并加入新群；这个永久能力拒绝不能重试，否则每条 UserRegionChanged
+			// 都会重投到 DLQ。removed=false 保留真实结果，nil 让 MQ 确认该读模型操作已降级完成。
+			return groupID, false, nil
+		}
 		return groupID, false, err
 	}
 	// 过渡期老客户端可能仍在 v1 旧区域群里，切区时一并尽力移除；

services/activity-service/internal/service/broadcast/service_test.go

@@ -333,6 +333,28 @@ func TestRemoveRegionBroadcastMemberDeletesOnlyUserMembership(t *testing.T) {
 	}
 }
 
+func TestRemoveRegionBroadcastMemberAcknowledgesAVChatKickRestriction(t *testing.T) {
+	publisher := &fakePublisher{deleteError: tencentim.RESTError{Code: 10007, Info: "this group disable kick member"}}
+	service := New(Config{NodeID: "node-a"}, newFakeRepository(), publisher, nil)
+
+	groupID, removed, err := service.RemoveRegionBroadcastMember(appcode.WithContext(context.Background(), "lalu"), 42, 1001)
+	if err != nil {
+		t.Fatalf("AVChat kick restriction must be acknowledged without retry: %v", err)
+	}
+	if removed || groupID != "hy_lalu_bc_r_v2_1001" {
+		t.Fatalf("AVChat restriction result mismatch: group_id=%s removed=%t", groupID, removed)
+	}
+	if len(publisher.deletedGroupIDs) != 1 {
+		t.Fatalf("unsupported v2 removal must not retry the legacy AVChat group: %v", publisher.deletedGroupIDs)
+	}
+
+	// 10007 还可能表示其他群业务错误；只能降级腾讯明确返回的 disable-kick 语义。
+	publisher.deleteError = tencentim.RESTError{Code: 10007, Info: "another group error"}
+	if _, _, err := service.RemoveRegionBroadcastMember(appcode.WithContext(context.Background(), "lalu"), 42, 1001); err == nil {
+		t.Fatal("unrelated Tencent IM 10007 error must remain retryable")
+	}
+}
+
 func TestRegionBroadcastUsesConfiguredGroupPrefix(t *testing.T) {
 	repository := newFakeRepository()
 	publisher := &fakePublisher{}
@@ -520,6 +542,7 @@ type fakePublisher struct {
 	ensureErrors    map[string]error
 	deletedGroupIDs []string
 	deletedUserID   int64
+	deleteError     error
 }
 
 func (p *fakePublisher) EnsureGroup(_ context.Context, spec tencentim.GroupSpec) error {
@@ -535,7 +558,7 @@ func (p *fakePublisher) PublishGroupCustomMessage(_ context.Context, message ten
 func (p *fakePublisher) DeleteGroupMember(_ context.Context, groupID string, userID int64) error {
 	p.deletedGroupIDs = append(p.deletedGroupIDs, groupID)
 	p.deletedUserID = userID
-	return nil
+	return p.deleteError
 }
 
 type fakeRegionSource struct {