feat: add display kiosk host

surfaces/shell/src/display-assets.ts

@@ -0,0 +1,14 @@
+/**
+ * Exact built files a deployable app may publish for the Ekklesia display host.
+ *
+ * They are file URLs relative to this package's compiled `dist/index.js`, not repository paths and
+ * not request-derived selectors. `apps/api` reads these exact two files before binding and serves
+ * their bytes at fixed host-owned routes; the module display artifact remains a separate, validated
+ * publication. Nothing here exposes a directory or a generic static-file root.
+ */
+const packageRoot = new URL("../", import.meta.url);
+
+export const displayHostAssetUrls = Object.freeze({
+  html: new URL("dist/browser/display/index.html", packageRoot).href,
+  script: new URL("dist/browser/display/app.js", packageRoot).href,
+});