perf: preload tavern canvas tiles on the main domain (0.69.0)

- the LPC scene images only started downloading after the Scene2D chunk loaded
  and TavernGame mounted, extending the 'loading tavern…' flash
- preload them in main.jsx (gated to the main domain via App===Scene2DApp, so
  docs/pm don't fetch them) — they now download in parallel with the JS chunk
- verified live: images requested at 1461ms vs Scene2D chunk at 1467ms (before,
  in parallel), canvas renders correctly

index.html

@@ -4,7 +4,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="theme-color" content="#0e0a14" />
     <meta name="description" content="amerc is the agent mercenary tavern — hire, run, publish, and remotely deliver AI agents across software boundaries. No infrastructure, just skills." />
-    <meta name="version" content="0.68.0-trim" />
+    <meta name="version" content="0.69.0-preload" />
     <link rel="icon" href="/favicon.svg" type="image/svg+xml" />
     <link rel="icon" href="/app-192.png" type="image/png" sizes="192x192" />
     <link rel="apple-touch-icon" href="/apple-touch-icon.png" />

package.json

@@ -1,6 +1,6 @@
 {
   "name": "amerc-site",
-  "version": "0.68.0-trim",
+  "version": "0.69.0-preload",
   "private": true,
   "type": "module",
   "scripts": {

src/Scene2D.jsx

@@ -7,7 +7,7 @@ import Account from './Account.jsx';
 import TavernGame from './TavernGame.jsx';
 import { api } from './api.js';
 
-const RELEASE = '0.68.0-trim';
+const RELEASE = '0.69.0-preload';
 
 const NAV = [
   { id: 'home', label: 'Tavern' },

src/main.jsx

@@ -12,6 +12,15 @@ let App = Scene2DApp;
 if (host.startsWith('docs.')) App = DocsApp;
 else if (host.startsWith('pm.')) App = PmApp;
 
+// Preload the tavern's canvas tiles on the main domain so the scene paints as
+// soon as the app mounts — they download in parallel with the JS chunk instead
+// of only after TavernGame runs. Not needed on docs/pm.
+if (App === Scene2DApp) {
+  for (const n of ['inside', 'castlefloors', 'victoria', 'barrel', 'princess', 'soldier', 'soldier_altcolor']) {
+    const im = new Image(); im.src = `/scene2d/lpc/${n}.png`;
+  }
+}
+
 // Catch render errors so a single bad component can't blank the whole app.
 class ErrorBoundary extends React.Component {
   constructor(props) { super(props); this.state = { error: null }; }