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

vitest.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from "vitest/config";
+import path from "node:path";
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      "@": path.resolve(__dirname, "./src"),
+    },
+  },
+  test: {
+    environment: "node",
+  },
+});