Commit inicial: GTI Maquina Comercial

App local (Node + SQLite) para captura, tratamento e exportacao de leads
comerciais, com dashboard de gestao, login/usuarios e integracao Z-PRO.

Co-Authored-By: Claude <noreply@anthropic.com>

public/js/login.js

@@ -0,0 +1,16 @@
+/* Tela de login: autentica e redireciona para o app. */
+el('form-login').addEventListener('submit', async (event) => {
+  event.preventDefault();
+  const erroBox = el('login-erro');
+  erroBox.textContent = '';
+
+  try {
+    await API.post('/api/auth/login', {
+      username: el('login-username').value,
+      password: el('login-password').value
+    });
+    window.location.href = '/';
+  } catch (error) {
+    erroBox.textContent = error.message;
+  }
+});