feat: implementar SEO completo com sitemap, robots.txt, JSON-LD schema e Google Search Console docs

frontend/src/app/sitemap.ts

@@ -0,0 +1,59 @@
+import { MetadataRoute } from 'next';
+
+export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
+  const baseUrl = 'https://octto-engenharia.com';
+  const locales = ['', '/en', '/es'];
+  
+  // Páginas principais
+  const pages = [
+    { url: '', changefreq: 'weekly', priority: 1 },
+    { url: '/servicos', changefreq: 'monthly', priority: 0.8 },
+    { url: '/projetos', changefreq: 'weekly', priority: 0.8 },
+    { url: '/contato', changefreq: 'monthly', priority: 0.7 },
+    { url: '/sobre', changefreq: 'monthly', priority: 0.7 },
+    { url: '/privacidade', changefreq: 'yearly', priority: 0.5 },
+    { url: '/termos', changefreq: 'yearly', priority: 0.5 },
+  ];
+
+  // Buscar projetos do banco de dados
+  let projects = [];
+  try {
+    const res = await fetch(`${baseUrl}/api/projects`, {
+      next: { revalidate: 3600 }, // Cache por 1 hora
+    });
+    if (res.ok) {
+      projects = await res.json();
+    }
+  } catch (error) {
+    console.error('Erro ao buscar projetos para sitemap:', error);
+  }
+
+  // Gerar URLs
+  const sitemap: MetadataRoute.Sitemap = [];
+
+  // Adicionar páginas principais para cada locale
+  for (const locale of locales) {
+    for (const page of pages) {
+      sitemap.push({
+        url: `${baseUrl}${locale}${page.url}`,
+        lastModified: new Date(),
+        changeFrequency: page.changefreq as 'weekly' | 'monthly' | 'yearly',
+        priority: page.priority,
+      });
+    }
+  }
+
+  // Adicionar páginas de projetos específicos
+  for (const locale of locales) {
+    for (const project of projects) {
+      sitemap.push({
+        url: `${baseUrl}${locale}/projetos/${project.id}`,
+        lastModified: project.updatedAt ? new Date(project.updatedAt) : new Date(),
+        changeFrequency: 'monthly' as const,
+        priority: 0.6,
+      });
+    }
+  }
+
+  return sitemap;
+}