fix(homepage): alias @elizaos/ui to CloudVideoBackground.tsx directly

Pointing the alias at ui/src/index.ts caused dev-server failures
because @elizaos/ui imports @elizaos/shared which is not installed
in the homepage's node_modules. marketing.tsx only imports
CloudVideoBackground, so alias to that specific file instead.
Build drops from 37s to 1.1s as a side effect.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Shaw

packages/homepage/vite.config.ts

@@ -60,7 +60,10 @@ export default defineConfig({
       },
       {
         find: /^@elizaos\/ui$/,
-        replacement: path.resolve(__dirname, "../ui/src/index.ts"),
+        replacement: path.resolve(
+          __dirname,
+          "../ui/src/backgrounds/CloudVideoBackground.tsx",
+        ),
       },
     ],
   },