feat(landing): rebuild as Next.js app with live product mocks

Replaces the static HTML page with a Next.js 15 + Tailwind v4 + Motion
app. The hero renders the dashboard itself - live tiles, ticking clock,
wandering metrics, pulsing status dots - instead of screenshots. Adds a
playable four-renderer switcher (bento/cards/index/console) with layout
animations, live monitor/domain/system mocks, and a cycling alert feed.

Vercel project dash is now git-connected with root dir landing/; pushes
deploy automatically. Canonical alias: dash-homelab.vercel.app.

Authored By: TDvorak <[email protected]>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

AGENTS.md

@@ -9,7 +9,8 @@ Optional auth (off by default), no YAML. See `ROADMAP.md` (canonical) and
 - `apps/frontend` — React 18 + Vite + TS strict + Tailwind v4 + shadcn/ui
 - `apps/backend` — Go + Gin + zap, CGO-free, SQLite via `modernc.org/sqlite`
 - `packages/api-client` — generated TS client; `openapi.yaml` at repo root is the contract
-- `landing/` — static marketing page, deployed to Vercel; no build step, plain HTML/CSS/JS
+- `landing/` — Next.js 15 marketing site (own package.json, not a workspace);
+  Vercel project `dash`, root dir `landing`, git-connected to this repo
 - `infra/` — Dockerfile (multi-stage, one image)
 - `tools/oxlint/anti-slop` — vendored lint plugin (do not extend casually)
 - `data/` — runtime SQLite + uploaded icons (gitignored)