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>

oxlint.config.ts

@@ -6,6 +6,7 @@ export default defineConfig({
 		".claude/**",
 		"tools/oxlint/anti-slop/**",
 		"packages/api-client/src/schema.d.ts",
+		"landing/next-env.d.ts",
 		"**/dist/**",
 		"**/node_modules/**",
 	],