Build AI Chief of Staff MVP: auth, mailbox sync, briefings, draft replies

Scaffolds a Next.js app with email/password auth, encrypted IMAP/SMTP/CalDAV
mailbox connections, a background sync job, Claude-generated daily briefings,
and an approve-before-send draft reply flow. Includes a clean design system
(light/dark) and deployment config (systemd unit, credential rotation script).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012o9j9RezxbZVKQMrB7oRLY

src/app/(dashboard)/layout.tsx

@@ -0,0 +1,34 @@
+import { redirect } from "next/navigation";
+import { getCurrentSession } from "@/lib/auth/session";
+import { LogoutButton } from "./logout-button";
+import { NavLinks } from "./nav-links";
+
+export default async function DashboardLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  const session = await getCurrentSession();
+  if (!session) {
+    redirect("/login");
+  }
+
+  return (
+    <div style={{ display: "flex", flexDirection: "column", minHeight: "100%", flex: 1 }}>
+      <header className="topnav">
+        <div className="topnav-inner">
+          <div className="brand">
+            <div className="brand-mark" />
+            Chief of Staff
+          </div>
+          <NavLinks />
+          <div className="user-menu">
+            <span className="user-email">{session.user.email}</span>
+            <LogoutButton />
+          </div>
+        </div>
+      </header>
+      <main style={{ flex: 1 }}>{children}</main>
+    </div>
+  );
+}