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

next.config.ts

@@ -0,0 +1,10 @@
+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  // Not using output: "standalone" — its Turbopack file-tracing only copied
+  // argon2's native .node binaries, not its JS loader, causing a segfault
+  // in production. Deploying against the full node_modules via `next start`
+  // works correctly and is simple enough for a single-VM deployment.
+};
+
+export default nextConfig;