Reapply "Optimize RFV all-period analytics"

This reverts commit 19a29956d2.

backend/test/analyticsService.test.js

@@ -197,7 +197,7 @@ test('getRfmAnalytics classifies period buyers by history through the selected r
 
     pool.query = async (sql, params) => {
         calls.push({ sql, params });
-        const isHistoryQuery = sql.includes('recency_days');
+        const isHistoryQuery = sql.includes('AND data_pedido_date <= $1::date');
         const referenceDate = params[0];
 
         if (isHistoryQuery) {
@@ -282,3 +282,48 @@ test('getRfmAnalytics classifies period buyers by history through the selected r
         pool.query = originalQuery;
     }
 });
+
+test('getRfmAnalytics reuses period rows as RFV history for all-period ranges', async () => {
+    const originalQuery = pool.query;
+    const calls = [];
+
+    pool.query = async (sql, params) => {
+        calls.push({ sql, params });
+        return {
+            rows: [
+                {
+                    customer_key: '1',
+                    name: 'Cliente Frequente',
+                    phone: '1',
+                    monetary: 5000,
+                    frequency: 20,
+                    quantity_purchased: 20,
+                    last_purchase_date: '2026-06-14',
+                    recency_days: 1
+                },
+                {
+                    customer_key: '2',
+                    name: 'Cliente Antigo',
+                    phone: '2',
+                    monetary: 50,
+                    frequency: 1,
+                    quantity_purchased: 1,
+                    last_purchase_date: '2026-01-01',
+                    recency_days: 165
+                }
+            ]
+        };
+    };
+
+    try {
+        const result = await getRfmAnalytics({ start: '2000-01-01', end: '2026-06-15' });
+
+        assert.equal(calls.length, 1);
+        assert.match(calls[0].sql, /\(\$2::date - MAX\(data_pedido_date\)\)::int/);
+        assert.deepEqual(calls[0].params, ['2000-01-01', '2026-06-15']);
+        assert.equal(result.clients.length, 2);
+        assert.equal(result.segments.reduce((total, segment) => total + segment.count, 0), 2);
+    } finally {
+        pool.query = originalQuery;
+    }
+});