商品已完成优化

backend/internal/modules/listing/mutation.go

@@ -208,7 +208,7 @@ func (r *Repository) Update(ctx context.Context, ownerID uint64, listingID uint6
 		if err != nil {
 			return err
 		}
-		if listing.Status == "rented" || listing.InTransaction {
+		if listingLockedForOwnerMutation(listing) {
 			return ErrListingLocked
 		}
 
@@ -256,7 +256,7 @@ func (r *Repository) SubmitReview(ctx context.Context, ownerID uint64, listingID
 		if err != nil {
 			return err
 		}
-		if listing.Status == "rented" || listing.InTransaction {
+		if listingLockedForOwnerMutation(listing) {
 			return ErrListingLocked
 		}
 		listingStatus, reviewStatus, publishedAt := initialPublishState(reviewRequired)
@@ -346,7 +346,7 @@ func (r *Repository) Offline(ctx context.Context, ownerID uint64, listingID uint
 		if err != nil {
 			return err
 		}
-		if listing.Status == "rented" || listing.InTransaction {
+		if listingLockedForOwnerMutation(listing) {
 			return ErrListingLocked
 		}
 		listing.Status = "offline"
@@ -365,3 +365,10 @@ func (r *Repository) Offline(ctx context.Context, ownerID uint64, listingID uint
 	})
 	return dto, err
 }
+
+func listingLockedForOwnerMutation(listing *model.RentalListing) bool {
+	if listing == nil {
+		return true
+	}
+	return listing.Status == "rented" || listing.Status == "completed" || listing.InTransaction
+}

backend/internal/modules/listing/service_test.go

@@ -213,6 +213,47 @@ func TestRepositoryUpdateAllowsOfflineListingResubmit(t *testing.T) {
 	}
 }
 
+func TestRepositoryRejectsCompletedListingOwnerMutations(t *testing.T) {
+	db := database.NewTestDB()
+	if err := db.AutoMigrate(&model.GameAccount{}, &model.RentalListing{}); err != nil {
+		t.Fatalf("failed to migrate test db: %v", err)
+	}
+	repo := NewRepository(db, nil)
+	account := model.GameAccount{
+		OwnerID:       1,
+		GameName:      "delta_force",
+		ServerRegion:  "QQ",
+		LoginPlatform: "QQ账号密码",
+		Title:         "已完成账号",
+		Status:        "offline",
+	}
+	if err := db.Create(&account).Error; err != nil {
+		t.Fatalf("failed to create account: %v", err)
+	}
+	listing := model.RentalListing{
+		ListingNo:         "202606270099",
+		AccountID:         account.ID,
+		OwnerID:           1,
+		Status:            "completed",
+		ReviewStatus:      "approved",
+		PriceCent:         10000,
+		DepositAmountCent: 50000,
+	}
+	if err := db.Create(&listing).Error; err != nil {
+		t.Fatalf("failed to create listing: %v", err)
+	}
+
+	if _, err := repo.Update(t.Context(), 1, listing.ID, validCreateRequest(), false); err != ErrListingLocked {
+		t.Fatalf("Update expected ErrListingLocked, got %v", err)
+	}
+	if _, err := repo.SubmitReview(t.Context(), 1, listing.ID, false); err != ErrListingLocked {
+		t.Fatalf("SubmitReview expected ErrListingLocked, got %v", err)
+	}
+	if _, err := repo.Offline(t.Context(), 1, listing.ID); err != ErrListingLocked {
+		t.Fatalf("Offline expected ErrListingLocked, got %v", err)
+	}
+}
+
 func validCreateRequest() CreateRequest {
 	return CreateRequest{
 		Title:             "测试账号",