fix(catalogs): replace models.ProductFamily with models.Catalog resolving HTTP 500 family creation bug, enforce tenant_id scoping on syndication preview, and seed TechNova1 products and superadmin credentials

src/features/catalogs/catalogs/catalog.service.js

@@ -125,7 +125,7 @@ export class CatalogService {
     const transaction = await sequelize.transaction();
     try {
       const baseCode = data.code || data.name || 'family';
-      data.code = await generateUniqueCode(models.ProductFamily, baseCode, 'code', transaction, { paranoid: false });
+      data.code = await generateUniqueCode(models.Catalog, baseCode, 'code', transaction, { paranoid: false });
       const attributeSetId = data.attributeSetId || data.attribute_set_id || null;
       if (attributeSetId) {
         const attributeSet = await models.AttributeSet.findByPk(attributeSetId, {

src/features/channels/channels/channel.controller.js

@@ -115,7 +115,7 @@ export class ChannelController {
 
   async previewPayload(req, res, next) {
     try {
-      const data = await syndicationService.previewPayload(req.params.id, req.query.productId);
+      const data = await syndicationService.previewPayload(req.params.id, req.query.productId, req.user);
       return res.status(200).json({ success: true, data });
     } catch (error) {
       next(error);

src/features/channels/syndication/syndication.service.js

@@ -27,7 +27,7 @@ export class SyndicationService {
     }
   }
 
-  async previewPayload(channelId, productId) {
+  async previewPayload(channelId, productId, userContext = {}) {
     const channel = await models.Channel.findByPk(channelId);
     if (!channel) {
       throw new ApiError(404, 'Channel not found');
@@ -37,11 +37,15 @@ export class SyndicationService {
       where: { channel_id: channelId }
     });
 
+    const tenantId = userContext.tenantId || channel.tenant_id || null;
+    const where = {};
+    if (tenantId) where.tenant_id = tenantId;
+
     let product = null;
     if (productId) {
-      product = await models.Product.findByPk(productId);
+      product = await models.Product.findOne({ where: { id: productId, ...where } });
     } else {
-      product = await models.Product.findOne();
+      product = await models.Product.findOne({ where });
     }
 
     if (!product) {