feat: surface seller contact methods on public detail pages

apps/api/src/modules/listings/repositories/listing-repository.js

@@ -17,6 +17,8 @@ import {
   marketValueOverrides,
   marketValuations,
   products,
+  sellers,
+  sellerSettings,
 } from "../../../infrastructure/database/schema.js";
 
 export function createListingRepository(db) {
@@ -220,7 +222,12 @@ export function createListingRepository(db) {
 
     async findPublicById(listingId) {
       const [result] = await db
-        .select({ listing: listings, condition: conditions })
+        .select({
+          listing: listings,
+          condition: conditions,
+          sellerDisplayName: sellers.displayName,
+          sellerSettings: sellerSettings.settings,
+        })
         .from(listings)
         .innerJoin(
           inventoryItems,
@@ -228,6 +235,8 @@ export function createListingRepository(db) {
         )
         .innerJoin(products, eq(products.id, inventoryItems.productId))
         .innerJoin(conditions, eq(conditions.id, inventoryItems.conditionId))
+        .innerJoin(sellers, eq(sellers.id, products.sellerId))
+        .leftJoin(sellerSettings, eq(sellerSettings.sellerId, sellers.id))
         .where(
           and(
             eq(listings.id, listingId),
@@ -263,6 +272,9 @@ export function createListingRepository(db) {
         marketValueMinor: override?.valueMinor ?? valuation?.valueMinor ?? null,
         marketValueCurrency: override?.currency ?? valuation?.currency ?? null,
         marketValueUpdatedAt: override?.createdAt ?? valuation?.calculatedAt ?? null,
+        sellerDisplayName: result.sellerDisplayName,
+        sellerContactEmail: result.sellerSettings?.general?.publicContactEmail ?? null,
+        sellerContactPhone: result.sellerSettings?.general?.publicContactPhone ?? null,
       };
     },
 

apps/api/src/modules/products/repositories/product-repository.js

@@ -4,6 +4,8 @@ import {
   inventoryItems,
   listings,
   products,
+  sellers,
+  sellerSettings,
 } from '../../../infrastructure/database/schema.js';
 
 export function createProductRepository(db) {
@@ -24,10 +26,16 @@ export function createProductRepository(db) {
 
     async findPublicBySlug(slug) {
       const [result] = await db
-        .select({ product: products })
+        .select({
+          product: products,
+          sellerDisplayName: sellers.displayName,
+          sellerSettings: sellerSettings.settings,
+        })
         .from(products)
         .innerJoin(inventoryItems, eq(inventoryItems.productId, products.id))
         .innerJoin(listings, eq(listings.inventoryItemId, inventoryItems.id))
+        .innerJoin(sellers, eq(sellers.id, products.sellerId))
+        .leftJoin(sellerSettings, eq(sellerSettings.sellerId, sellers.id))
         .where(and(
           eq(products.slug, slug),
           eq(inventoryItems.status, 'ACTIVE'),
@@ -35,7 +43,13 @@ export function createProductRepository(db) {
         ))
         .limit(1);
 
-      return result?.product ?? null;
+      if (!result) return null;
+      return {
+        ...result.product,
+        sellerDisplayName: result.sellerDisplayName,
+        sellerContactEmail: result.sellerSettings?.general?.publicContactEmail ?? null,
+        sellerContactPhone: result.sellerSettings?.general?.publicContactPhone ?? null,
+      };
     },
 
     async findBySellerIdAndSlug(sellerId, slug) {

apps/api/tests/http/public-listing-routes.test.js

@@ -36,6 +36,9 @@ function createTestApp() {
           conditionId: 'condition-1',
           askingPriceMinor: 2499,
           status: 'PENDING',
+          sellerDisplayName: 'Pika Collectibles',
+          sellerContactEmail: 'hello@pika.example',
+          sellerContactPhone: null,
         };
       },
     },
@@ -72,6 +75,8 @@ test('returns a public listing detail or a not-found response', async (testConte
 
   assert.equal(detailResponse.statusCode, 200);
   assert.equal('inventoryItemId' in detailResponse.json().data, false);
+  assert.equal(detailResponse.json().data.sellerDisplayName, 'Pika Collectibles');
+  assert.equal(detailResponse.json().data.sellerContactEmail, 'hello@pika.example');
   assert.equal(missingResponse.statusCode, 404);
   assert.equal(missingResponse.json().error.code, 'LISTING_NOT_FOUND');
 });

apps/api/tests/http/public-product-routes.test.js

@@ -21,6 +21,9 @@ function createTestApp() {
           name: 'Pikachu Plush',
           slug,
           description: 'A friendly plush.',
+          sellerDisplayName: 'Pika Collectibles',
+          sellerContactEmail: 'hello@pika.example',
+          sellerContactPhone: null,
           createdAt: new Date('2026-09-07T00:00:00.000Z'),
           updatedAt: new Date('2026-09-07T00:00:00.000Z'),
         };
@@ -51,6 +54,9 @@ test('returns a public product without private seller identity', async (testCont
     eventName: null,
     releaseYear: null,
     tags: [],
+    sellerDisplayName: 'Pika Collectibles',
+    sellerContactEmail: 'hello@pika.example',
+    sellerContactPhone: null,
     createdAt: '2026-09-07T00:00:00.000Z',
     updatedAt: '2026-09-07T00:00:00.000Z',
   });