feat(setup): add initial setup wizard for admin account and SMTP configuration

shop/app/auth/login/page.tsx

@@ -1,6 +1,12 @@
 import { LoginForm } from "@/components/login-form";
+import { isSetupNeeded } from "@/lib/actions/setup";
+import { redirect } from "next/navigation";
+
+export default async function Page() {
+  if (await isSetupNeeded()) {
+    redirect("/setup");
+  }
 
-export default function Page() {
   return (
     <div className="flex min-h-svh w-full items-center justify-center p-6 md:p-10">
       <div className="w-full max-w-sm">

shop/app/page.tsx

@@ -1,9 +1,15 @@
 import { createClient } from '@/lib/supabase/server'
 import { HomeClient } from '@/components/HomeClient'
+import { isSetupNeeded } from '@/lib/actions/setup'
+import { redirect } from 'next/navigation'
 
 export const dynamic = "force-dynamic"
 
 export default async function Home() {
+  if (await isSetupNeeded()) {
+    redirect('/setup')
+  }
+
   let user = null
   try {
     const supabase = await createClient()

shop/app/setup/page.tsx

@@ -0,0 +1,15 @@
+import { isSetupNeeded } from '@/lib/actions/setup'
+import { redirect } from 'next/navigation'
+import { SetupWizard } from '@/components/SetupWizard'
+
+export const dynamic = 'force-dynamic'
+
+export default async function SetupPage() {
+  const needed = await isSetupNeeded()
+
+  if (!needed) {
+    redirect('/')
+  }
+
+  return <SetupWizard />
+}