refactor: separate React views, Redux snapshots and Three.js runtime

vitest.config.js

@@ -0,0 +1,4 @@
+import {defineConfig} from 'vitest/config';
+import react from '@vitejs/plugin-react';
+import {fileURLToPath} from 'node:url';
+export default defineConfig({plugins:[react()],resolve:{alias:{'@':fileURLToPath(new URL('./src',import.meta.url))}},test:{environment:'jsdom',include:['src/**/*.test.{js,jsx}'],setupFiles:['./src/tests/setup.js']}});