feat(settings): sidebar layout with profile, security, AI, notifications, nutrition

Sticky sidebar nav. Sections: Profile (name/language), Security (email/password change),
AI & Models (BYOK keys + per-use-case model prefs), Notifications (push subscribe),
Nutrition goals. Sub-pages: API keys, Webhooks.

apps/web/app/(app)/settings/security/page.tsx

@@ -0,0 +1,13 @@
+import type { Metadata } from "next";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth/server";
+import { SecurityForm } from "@/components/settings/security-form";
+
+export const metadata: Metadata = { title: "Security – Settings" };
+
+export default async function SecurityPage() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) return null;
+
+  return <SecurityForm currentEmail={session.user.email} />;
+}