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/stats.html

@@ -0,0 +1,22 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <meta name="theme-color" content="#0a0a0a" />
+    <meta name="robots" content="noindex,nofollow" />
+    <title>Stats · Just Works Business</title>
+    <link rel="stylesheet" href="/assets/tokens.css" />
+    <link rel="stylesheet" href="/assets/ds.css" />
+    <link rel="stylesheet" href="/assets/stats.css?v=1" />
+  </head>
+  <body>
+    <main id="app">
+      <section class="loading">
+        <span>∩</span>
+        <p>Reading this merchant’s signals…</p>
+      </section>
+    </main>
+    <script type="module" src="/assets/stats.js?v=1"></script>
+  </body>
+</html>