Улучшил работу, мелкие фиксы

vite.config.ts

@@ -1,11 +1,18 @@
-import { defineConfig } from 'vite'
+import { defineConfig, loadEnv } from 'vite'
 import react from '@vitejs/plugin-react'
 
 // https://vite.dev/config/
-export default defineConfig({
-  // Needed when the build is served from a subpath (e.g. local/diagram-app/
-  // inside the Bitrix docroot) instead of domain root — see
-  // docs/bitrix-integration.md §7.
-  base: process.env.VITE_BASE_PATH || '/',
-  plugins: [react()],
+export default defineConfig(({ mode }) => {
+  // VITE_BASE_PATH is read here (config/Node context), so it needs an explicit
+  // loadEnv call — unlike VITE_BITRIX_ORIGIN, which Vite injects into
+  // import.meta.env automatically because it's only read from app code.
+  const env = loadEnv(mode, process.cwd(), '')
+
+  return {
+    // Needed when the build is served from a subpath (e.g. local/diagram-app/
+    // inside the Bitrix docroot) instead of domain root — see
+    // docs/bitrix-integration.md §7.
+    base: env.VITE_BASE_PATH || '/',
+    plugins: [react()],
+  }
 })