feat(F-138): completed feature

project/src/app/build-app.ts

@@ -245,11 +245,13 @@ export async function buildApp(deps: BuildAppDeps = {}): Promise<FastifyInstance
       });
     });
 
+    const pricing = createPricingService(deps.pool);
     await app.register(async (instance) => {
       await registerCatalogRoutes(instance, {
         pool: deps.pool as pg.Pool,
         authenticate: combinedAuth,
         logger,
+        pricing,
       });
     });
 
@@ -261,7 +263,6 @@ export async function buildApp(deps: BuildAppDeps = {}): Promise<FastifyInstance
       });
     });
 
-    const pricing = createPricingService(deps.pool);
     await app.register(async (instance) => {
       await registerPricingRoutes(instance, {
         pool: deps.pool as pg.Pool,

project/src/app/tests/catalog.itest.ts

@@ -209,6 +209,43 @@ describe.skipIf(!hasDb)('catalog product flows (real PostgreSQL)', () => {
     expect(duplicateEan.statusCode).toBe(409);
   });
 
+  it('seeds a default price row immediately after variant creation (F-138 AC1, AC2, AC4)', async () => {
+    const productRes = await app.inject({
+      method: 'POST',
+      url: '/products',
+      headers: { 'content-type': 'application/json' },
+      cookies: { [SESSION_COOKIE_NAME]: adminCookie },
+      payload: {
+        name: 'Producto Semilla F-138',
+        slug: 'semilla-f138-ac1',
+        categoryIds: [categoryId],
+      },
+    });
+    expect(productRes.statusCode).toBe(201);
+    const productId = (productRes.json() as { id: string }).id;
+
+    const variantRes = await app.inject({
+      method: 'POST',
+      url: `/products/${productId}/variants`,
+      headers: { 'content-type': 'application/json' },
+      cookies: { [SESSION_COOKIE_NAME]: adminCookie },
+      payload: { sku: 'SKU-SEMILLA-F138', ean: '8412345678902', attributes: { size: '500ml' } },
+    });
+    expect(variantRes.statusCode).toBe(201);
+    const variantId = (variantRes.json() as { id: string }).id;
+
+    // F-138 AC1/AC2: a default price row exists immediately after variant creation
+    // (no 404 window on GET /pricing/variants/:id) and re-seeding is a no-op.
+    const priceRow = await pool.query(
+      'SELECT net_unit_amount_cents, vat_rate, currency FROM pricing_variant_prices WHERE variant_id = $1',
+      [variantId],
+    );
+    expect(priceRow.rows[0]).toBeDefined();
+    expect(priceRow.rows[0]!.net_unit_amount_cents).toBe(0);
+    expect(priceRow.rows[0]!.vat_rate).toBe('general');
+    expect(priceRow.rows[0]!.currency).toBe('EUR');
+  });
+
   it('stores nutrition provenance and protects manual nutrition from external overwrite (F-010 AC2, AC3)', async () => {
     const manual = await app.inject({
       method: 'PATCH',