diff --git a/server.js b/server.js
index f80fa3b..261747d 100644
--- a/server.js
+++ b/server.js
@@ -1286,9 +1286,19 @@ app.get("/whatsapp/settings", authMiddleware, async (req, res) => {
 
 app.post("/whatsapp/settings", authMiddleware, async (req, res) => {
     try {
-        await pool.query("UPDATE users SET wa_settings = $1 WHERE id=$2", [JSON.stringify(req.body), req.user.accountId]);
+        // 👇 MAGIA: Usamos COALESCE y el operador || de PostgreSQL para FUSIONAR los JSON. 
+        // Así, si guardas la IA, no borra el Robot, y si guardas el Robot, no borra la IA.
+        await pool.query(`
+            UPDATE users 
+            SET wa_settings = COALESCE(wa_settings, '{}'::jsonb) || $1::jsonb 
+            WHERE id=$2
+        `, [JSON.stringify(req.body), req.user.accountId]);
+        
         res.json({ ok: true });
-    } catch (e) { res.status(500).json({ ok: false }); }
+    } catch (e) { 
+        console.error("Error guardando settings:", e);
+        res.status(500).json({ ok: false }); 
+    }
 });
 
 // ==========================================