Refresh UI components and showcase; release updated framework packages

packages/viewer/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@wrnexus/viewer",
-  "version": "0.8.12",
+  "version": "0.8.13",
   "type": "module",
   "sideEffects": true,
   "description": "Read-only file previews with bounded loading and graceful fallback.",