feat(scaffold): Next 16 + Payload 3 scaffold with Kaniko CI and Swarm deploy

Initial app scaffold wired end-to-end: Payload 3.82 CMS integrated with Next
16.2 App Router (standalone output), PostgreSQL 17 adapter, Lexical rich text,
Tailwind 3 with Material 3 token palette ported from the stitch technical-
editorial design, self-hosted Space Grotesk + Inter via next/font, and
lucide-react icons. Admin lives at /admin, REST/GraphQL at /api/*, and
/api/health returns build SHA/REV for deploy verification.

Seven collections (Users, Media, Categories, Projects, Posts, Gear,
ContactSubmissions) and six globals (Home, About, Contact, Resume,
Navigation, SEO) model the content outlined in docs/PRD.md.

Multi-stage Dockerfile builds a non-root standalone runner; Woodpecker
pipeline lints, typechecks, builds, audits, builds with Kaniko to
git.mosaicstack.dev, scans with Trivy, and links the package. Swarm
compose mirrors the mosaic-stack-website Traefik entrypoints=web pattern
with www->apex redirect and immutable WEB_IMAGE_TAG.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/(frontend)/about/page.tsx

@@ -0,0 +1,27 @@
+import { SiteHeader } from "@/components/SiteHeader";
+import { SiteFooter } from "@/components/SiteFooter";
+
+export const metadata = { title: "About" };
+
+export default function AboutPage() {
+  return (
+    <>
+      <SiteHeader />
+      <main className="mx-auto max-w-7xl px-6 py-24">
+        <span className="mb-6 block font-label text-xs uppercase tracking-[0.4em] text-tertiary">
+          02 // PROFILE
+        </span>
+        <h1 className="mb-8 font-headline text-5xl font-bold tracking-tighter md:text-7xl">
+          About
+        </h1>
+        <p className="max-w-3xl font-body text-xl text-on-surface-variant">
+          Engineering growth through technological mastery and strategic
+          leadership. Content sourced from Payload CMS (global:{" "}
+          <code className="font-label text-primary">about</code>) — populated on
+          first publish.
+        </p>
+      </main>
+      <SiteFooter />
+    </>
+  );
+}