Правки для лучшей интеграции

vite.config.ts

@@ -15,7 +15,14 @@ import react from '@vitejs/plugin-react'
 // so this hashes and renames the file directly on disk after the whole build
 // has finished writing it, rather than fighting the bundler's own emit step.
 // Stable entry point for hosts: never hashed, always present next to the build.
-const MANIFEST_FILE_NAME = 'app.json'
+//
+// Content is JSON, but the extension is .js on purpose: the Bitrix stand's
+// nginx serves static straight from disk only for a fixed extension list
+// (js|css|html|svg|png|...), and `json` is not in it — a .json file falls
+// through to the Bitrix PHP router and comes back as a 404 HTML page
+// (verified on the stand). `.js` is the one extension guaranteed to be served
+// anywhere this build is deployed, since the build itself depends on it.
+const MANIFEST_FILE_NAME = 'app-manifest.js'
 
 function hashIndexHtml(): Plugin {
   let outDir = 'dist'