feat: initial commit — asaas-checkout template white-label

Template genérico de checkout com ASAAS, parametrizado via env vars.
Inclui fluxo completo: checkout → pedido → polling → webhook → admin.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/layout-client.tsx

@@ -0,0 +1,27 @@
+"use client"
+
+import { ThemeProvider } from "@/components/theme-provider"
+import { SiteHeader } from "@/components/site-header"
+import { SiteFooter } from "@/components/site-footer"
+import { Toaster } from "@/components/ui/toaster"
+import type React from "react"
+import { AuthProvider } from "@/lib/auth-context"
+import { usePathname } from "next/navigation"
+
+export default function ClientRootLayoutContent({ children }: { children: React.ReactNode }) {
+  const pathname = usePathname()
+  const isLoginPage = pathname === "/login"
+
+  return (
+    <ThemeProvider attribute="class" defaultTheme="light" enableSystem>
+      <AuthProvider>
+        <div className="relative flex min-h-screen flex-col">
+          {!isLoginPage && <SiteHeader />}
+          <main className="flex-1">{children}</main>
+          {!isLoginPage && <SiteFooter />}
+        </div>
+        <Toaster />
+      </AuthProvider>
+    </ThemeProvider>
+  )
+}