feat: improve public listing detail

Expose public condition labels and safe market values on listing details, with Storybook coverage for market value presentation.

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

@@ -1,8 +1,11 @@
 import { and, asc, count, desc, eq, ilike, inArray, or, sql } from 'drizzle-orm';
 
 import {
+  conditions,
   inventoryItems,
   listings,
+  marketValueOverrides,
+  marketValuations,
   products,
 } from '../../../infrastructure/database/schema.js';
 
@@ -134,17 +137,31 @@ export function createListingRepository(db) {
 
     async findPublicById(listingId) {
       const [result] = await db
-        .select({ listing: listings })
+        .select({ listing: listings, condition: conditions })
         .from(listings)
         .innerJoin(inventoryItems, eq(inventoryItems.id, listings.inventoryItemId))
         .innerJoin(products, eq(products.id, inventoryItems.productId))
+        .innerJoin(conditions, eq(conditions.id, inventoryItems.conditionId))
         .where(and(
           eq(listings.id, listingId),
           inArray(listings.status, ['AVAILABLE', 'PENDING']),
           eq(inventoryItems.status, 'ACTIVE'),
         ));
 
-      return result?.listing ?? null;
+      if (!result) return null;
+      const [override] = await db.select().from(marketValueOverrides)
+        .where(eq(marketValueOverrides.inventoryItemId, result.listing.inventoryItemId))
+        .orderBy(desc(marketValueOverrides.createdAt)).limit(1);
+      const [valuation] = await db.select().from(marketValuations)
+        .where(eq(marketValuations.inventoryItemId, result.listing.inventoryItemId))
+        .orderBy(desc(marketValuations.calculatedAt)).limit(1);
+      return {
+        ...result.listing,
+        conditionName: result.condition.name,
+        conditionCode: result.condition.code,
+        marketValueMinor: override?.valueMinor ?? valuation?.valueMinor ?? null,
+        marketValueCurrency: override?.currency ?? valuation?.currency ?? null,
+      };
     },
 
     async updateStatus(listingId, status) {