feat: integrate Just Works app and native business setup

Preserve hosted website UX inside Archipelago, add isolated Business and owner-authorized native wallet setup, and include deployment handoff. Based on main with native signer import already accepted.

docker/justworks/business/public/book.html

@@ -0,0 +1 @@
+<!doctype html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1,viewport-fit=cover"><meta name="theme-color" content="#080808"><title>Book with Just Works</title><link rel="stylesheet" href="/assets/design-system.css?v=1"><link rel="stylesheet" href="/assets/modules.css?v=5"><script>(function(){try{var t=localStorage.getItem('jw-theme');if(t)document.documentElement.dataset.theme=t}catch(e){}})()</script></head><body><main id="app"><section class="loading"><span>⌁</span><p>Opening table booking…</p></section></main><script type="module" src="/assets/book.js?v=6"></script></body></html>