feat: v0.9.0 — single-screen 3-pane shell + left Assets pane (wallet/reputation/fleet/time controls) from a single /api/state poll; right pane placeholder

app/page.tsx

@@ -1,9 +1,23 @@
 'use client';
 
 import dynamic from 'next/dynamic';
+import LeftPane from '@/components/LeftPane';
+import { useGameState } from '@/lib/useGameState';
 
 const Map = dynamic(() => import('@/components/Map'), { ssr: false });
 
 export default function Home() {
-  return <Map />;
+  // Single polling source for the whole shell (v0.9.0): one /api/state loop, snapshot passed
+  // down as props so later panes can share it without extra poll loops.
+  const { state, loading, error, refresh } = useGameState(1000);
+
+  return (
+    <div className="app-shell">
+      <LeftPane state={state} loading={loading} error={error} onRefresh={refresh} />
+      <Map />
+      <aside data-testid="right-pane" className="pane right-pane">
+        <h2 className="pane-title">Jobs &amp; Market</h2>
+      </aside>
+    </div>
+  );
 }