Optimize products list analytics loading

backend/test/analyticsService.test.js

@@ -11,6 +11,7 @@ const {
     getClientAnalytics,
     getClientDetailsAnalytics,
     getPreviousDate,
+    getProductAnalytics,
     getRecencyScore,
     getRfmAnalytics,
     getRfmSegment,
@@ -330,6 +331,67 @@ test('buildRfmClients applies lifecycle protections to new, hibernating, at-risk
     assert.equal(byKey.get('lost').rfmScore, '113');
 });
 
+test('getProductAnalytics returns exact product rows with stock and latest price', async () => {
+    const originalQuery = pool.query;
+    const calls = [];
+
+    pool.query = async (sql, params = []) => {
+        calls.push({ sql, params });
+
+        return {
+            rows: [
+                {
+                    id: '919483307',
+                    name: 'BASE LISA CAMISETA COR PRETO TAMANHO - G',
+                    quantity_sold: 9513,
+                    revenue: 113216.83,
+                    order_line_count: 100,
+                    last_price: 11.9,
+                    stock: 11731,
+                    first_sale_date: '2026-06-01',
+                    last_sale_date: '2026-06-22'
+                },
+                {
+                    id: 'stock-only',
+                    name: 'Produto sem venda no período',
+                    quantity_sold: 0,
+                    revenue: 0,
+                    order_line_count: 0,
+                    last_price: 0,
+                    stock: 12,
+                    first_sale_date: null,
+                    last_sale_date: null
+                }
+            ]
+        };
+    };
+
+    try {
+        const products = await getProductAnalytics({ start: '2026-06-01', end: '2026-06-22' });
+
+        assert.equal(calls.length, 1);
+        assert.match(calls[0].sql, /WITH period_sales AS/);
+        assert.match(calls[0].sql, /FULL OUTER JOIN stock_rows/);
+        assert.doesNotMatch(calls[0].sql, /GROUP BY name/);
+        assert.deepEqual(calls[0].params, ['2026-06-01', '2026-06-22']);
+        assert.deepEqual(products[0], {
+            id: '919483307',
+            name: 'BASE LISA CAMISETA COR PRETO TAMANHO - G',
+            quantitySold: 9513,
+            revenue: 113216.83,
+            orderLineCount: 100,
+            lastPrice: 11.9,
+            stock: 11731,
+            firstSaleDate: '2026-06-01',
+            lastSaleDate: '2026-06-22'
+        });
+        assert.equal(products[1].id, 'stock-only');
+        assert.equal(products[1].stock, 12);
+    } finally {
+        pool.query = originalQuery;
+    }
+});
+
 test('getClientAnalytics returns opaque client tokens', async () => {
     const originalQuery = pool.query;
     const calls = [];