Carry over pre-existing WABA outreach automation WIP

This work already existed uncommitted in the main working tree (not
authored by this branch) and is required as a runtime dependency for the
campaign outreach port (zpro-client, templates, outreach routes/UI). Copied
in as-is, untouched, so this feature branch has a working baseline; the
original uncommitted state in the main checkout is left exactly as it was.

tests/db.test.mjs

@@ -1,6 +1,6 @@
 import test from 'node:test';
 import assert from 'node:assert/strict';
-import { openDb, createLeadInserter, transaction, getSetting, setSetting, seedSegments, seedMunicipios, seedGeoCache, seedSettings } from '../src/db.mjs';
+import { openDb, createLeadInserter, transaction, getSetting, setSetting, seedSegments, seedMunicipios, seedGeoCache, seedSettings, seedMessageTemplates, updateMessageTemplate } from '../src/db.mjs';
 
 function sampleLead(overrides = {}) {
   return {
@@ -90,6 +90,22 @@ test('settings: get/set e seed com defaults Z-PRO', () => {
   db.close();
 });
 
+test('message_templates salva variaveis WABA automaticas por produto', () => {
+  const db = openDb(':memory:');
+  seedMessageTemplates(db, ['ERP']);
+
+  const updated = updateMessageTemplate(db, 'ERP', {
+    canal: 'oficial',
+    templateWabaNome: 'gti_inicio_atendimento_solicitado',
+    templateWabaIdioma: 'pt_BR',
+    templateWabaVariaveis: ['{empresa}', 'Assunto: {produto}', '']
+  });
+
+  assert.equal(updated.template_waba_nome, 'gti_inicio_atendimento_solicitado');
+  assert.deepEqual(JSON.parse(updated.template_waba_variaveis_json), ['{empresa}', 'Assunto: {produto}']);
+  db.close();
+});
+
 test('seeds de segments, municipios e geo_cache', () => {
   const db = openDb(':memory:');