Scaffold Homelab Manager foundation

Monorepo (Express+TS+Drizzle/libSQL server, React+Vite+Tabler web) matching
the stack used by ScheduleTaskManager and Sloth Manager. Includes Authentik
OIDC login with local admin/operator/viewer roles (first user becomes admin),
a generalized audit log, encrypted-at-rest storage for future integration API
tokens, the DB schema for all planned modules, and the Tabler-styled app
shell/nav. Also ports the Secrets (expiry tracker) and IP Addresses (IPAM)
modules from Sloth Manager onto the new stack.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/pages/Login.tsx

@@ -0,0 +1,13 @@
+export default function Login() {
+  return (
+    <div className="login-screen">
+      <div className="login-card">
+        <h1>Homelab Manager</h1>
+        <p>Sign in with your homelab identity provider to continue.</p>
+        <a className="btn btn-primary w-100" href="/auth/login">
+          Sign in with Authentik
+        </a>
+      </div>
+    </div>
+  );
+}