feat: initpage com sync Go + auth + frontend em web/

web/manifest.json

@@ -0,0 +1,19 @@
+{
+  "name": "InitPage — Sua página inicial",
+  "short_name": "InitPage",
+  "description": "Página inicial personalizável com atalhos, categorias, busca e plano de fundo.",
+  "start_url": "./",
+  "scope": "./",
+  "display": "standalone",
+  "background_color": "#0f172a",
+  "theme_color": "#0f172a",
+  "lang": "pt-BR",
+  "icons": [
+    {
+      "src": "icon.svg",
+      "sizes": "any",
+      "type": "image/svg+xml",
+      "purpose": "any maskable"
+    }
+  ]
+}