Baseline commit of the existing Maquina Comercial Pessoal project

Tracks the app that was already in place (capture, treatment, outreach,
WhatsApp integration, server, frontend, tests, docs) so future feature
work can branch and use isolated worktrees.

tests/stream-json.test.mjs

@@ -0,0 +1,70 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import os from 'node:os';
+import { streamJsonArray } from '../src/util/stream-json.mjs';
+
+async function collect(filePath, options) {
+  const items = [];
+  for await (const item of streamJsonArray(filePath, options)) {
+    items.push(item);
+  }
+  return items;
+}
+
+async function withTempFile(content, fn) {
+  const file = path.join(os.tmpdir(), `gti-test-json-${Date.now()}-${Math.random().toString(36).slice(2)}.json`);
+  await fs.writeFile(file, content, 'utf8');
+  try {
+    return await fn(file);
+  } finally {
+    await fs.rm(file, { force: true });
+  }
+}
+
+test('streamJsonArray le array pretty-printed com chaves e aspas dentro de strings', async () => {
+  const data = [
+    { nome: 'Empresa {teste} "aspas"', valor: 10, aninhado: { lista: [1, 2, { x: '}' }] } },
+    { nome: 'Segunda \\ barra', vazio: null }
+  ];
+
+  await withTempFile(JSON.stringify(data, null, 2), async (file) => {
+    const items = await collect(file);
+    assert.deepEqual(items, data);
+  });
+});
+
+test('streamJsonArray funciona com JSON compacto e BOM', async () => {
+  const data = [{ a: 1 }, { b: '[{teste}]' }, { c: [{ d: 2 }] }];
+
+  await withTempFile('' + JSON.stringify(data), async (file) => {
+    const items = await collect(file);
+    assert.deepEqual(items, data);
+  });
+});
+
+test('streamJsonArray processa elementos maiores que o chunk', async () => {
+  const data = [
+    { texto: 'x'.repeat(500), fim: 'ok' },
+    { texto: 'y'.repeat(300) }
+  ];
+
+  await withTempFile(JSON.stringify(data, null, 2), async (file) => {
+    const items = await collect(file, { highWaterMark: 64 });
+    assert.deepEqual(items, data);
+  });
+});
+
+test('streamJsonArray retorna vazio para array vazio', async () => {
+  await withTempFile('[]', async (file) => {
+    const items = await collect(file);
+    assert.deepEqual(items, []);
+  });
+});
+
+test('streamJsonArray falha com erro claro em arquivo truncado', async () => {
+  await withTempFile('[\n  { "a": 1 },\n  { "b": 2', async (file) => {
+    await assert.rejects(() => collect(file), /JSON truncado/);
+  });
+});