feat(01-02): build agent portal layout, dashboard stub, and logout mechanism

- LogoutButton: client component with server action calling signOut to ?signed_out=1
- AgentLayout: defense-in-depth auth() check, header with email and sign-out button
- DashboardPage: belt-and-suspenders auth() check, welcome message with agent email
- HomePage: updated to Teressa Copeland Homes placeholder (Phase 2 marketing site)
- npm run build and npx tsc --noEmit both pass with zero errors

teressa-copeland-homes/src/app/agent/dashboard/page.tsx

@@ -0,0 +1,17 @@
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+
+export default async function DashboardPage() {
+  // Defense-in-depth session check (layout also checks, this is belt-and-suspenders)
+  const session = await auth();
+  if (!session) redirect("/agent/login");
+
+  return (
+    <div>
+      <h1 className="text-2xl font-semibold text-gray-900">Dashboard</h1>
+      <p className="mt-2 text-gray-500">
+        Welcome back, {session.user?.email}. Portal content coming in Phase 3.
+      </p>
+    </div>
+  );
+}

teressa-copeland-homes/src/app/agent/layout.tsx

@@ -0,0 +1,26 @@
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { LogoutButton } from "@/components/ui/LogoutButton";
+
+export default async function AgentLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  // Defense-in-depth: middleware handles most cases, this catches edge cases
+  const session = await auth();
+  if (!session) redirect("/agent/login");
+
+  return (
+    <div className="min-h-screen bg-gray-50">
+      <header className="bg-white border-b border-gray-200 px-6 py-4 flex items-center justify-between">
+        <span className="text-sm font-medium text-gray-700">Agent Portal</span>
+        <div className="flex items-center gap-4">
+          <span className="text-sm text-gray-500">{session.user?.email}</span>
+          <LogoutButton />
+        </div>
+      </header>
+      <main className="p-6">{children}</main>
+    </div>
+  );
+}

teressa-copeland-homes/src/app/page.tsx

@@ -1,65 +1,11 @@
-import Image from "next/image";
-
-export default function Home() {
+export default function HomePage() {
   return (
-    <div className="flex flex-col flex-1 items-center justify-center bg-zinc-50 font-sans dark:bg-black">
-      <main className="flex flex-1 w-full max-w-3xl flex-col items-center justify-between py-32 px-16 bg-white dark:bg-black sm:items-start">
-        <Image
-          className="dark:invert"
-          src="/next.svg"
-          alt="Next.js logo"
-          width={100}
-          height={20}
-          priority
-        />
-        <div className="flex flex-col items-center gap-6 text-center sm:items-start sm:text-left">
-          <h1 className="max-w-xs text-3xl font-semibold leading-10 tracking-tight text-black dark:text-zinc-50">
-            To get started, edit the page.tsx file.
-          </h1>
-          <p className="max-w-md text-lg leading-8 text-zinc-600 dark:text-zinc-400">
-            Looking for a starting point or more instructions? Head over to{" "}
-            <a
-              href="https://vercel.com/templates?framework=next.js&utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-              className="font-medium text-zinc-950 dark:text-zinc-50"
-            >
-              Templates
-            </a>{" "}
-            or the{" "}
-            <a
-              href="https://nextjs.org/learn?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-              className="font-medium text-zinc-950 dark:text-zinc-50"
-            >
-              Learning
-            </a>{" "}
-            center.
-          </p>
-        </div>
-        <div className="flex flex-col gap-4 text-base font-medium sm:flex-row">
-          <a
-            className="flex h-12 w-full items-center justify-center gap-2 rounded-full bg-foreground px-5 text-background transition-colors hover:bg-[#383838] dark:hover:bg-[#ccc] md:w-[158px]"
-            href="https://vercel.com/new?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-            target="_blank"
-            rel="noopener noreferrer"
-          >
-            <Image
-              className="dark:invert"
-              src="/vercel.svg"
-              alt="Vercel logomark"
-              width={16}
-              height={16}
-            />
-            Deploy Now
-          </a>
-          <a
-            className="flex h-12 w-full items-center justify-center rounded-full border border-solid border-black/[.08] px-5 transition-colors hover:border-transparent hover:bg-black/[.04] dark:border-white/[.145] dark:hover:bg-[#1a1a1a] md:w-[158px]"
-            href="https://nextjs.org/docs?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-            target="_blank"
-            rel="noopener noreferrer"
-          >
-            Documentation
-          </a>
+    <main className="min-h-screen flex items-center justify-center">
+      <div className="text-center">
+        <h1 className="text-4xl font-bold text-gray-900">Teressa Copeland Homes</h1>
+        <p className="mt-4 text-gray-600">Real estate expertise for Utah home buyers and sellers.</p>
+        <p className="mt-2 text-sm text-gray-400">Marketing site coming in Phase 2.</p>
       </div>
     </main>
-    </div>
   );
 }

teressa-copeland-homes/src/components/ui/LogoutButton.tsx

@@ -0,0 +1,19 @@
+import { signOut } from "@/lib/auth";
+
+async function logoutAction() {
+  "use server";
+  await signOut({ redirectTo: "/agent/login?signed_out=1" });
+}
+
+export function LogoutButton() {
+  return (
+    <form action={logoutAction}>
+      <button
+        type="submit"
+        className="text-sm text-gray-600 hover:text-gray-900 underline"
+      >
+        Sign out
+      </button>
+    </form>
+  );
+}