feat: add SpeedSelector popup component

Co-authored-by: Cursor <cursoragent@cursor.com>

vite.config.ts

@@ -3,17 +3,19 @@ import process from 'node:process';
 import { fileURLToPath } from 'node:url';
 import { defineConfig } from 'vitest/config';
 import { svelte } from '@sveltejs/vite-plugin-svelte';
+import { svelteTesting } from '@testing-library/svelte/vite';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 const host = process.env.TAURI_DEV_HOST;
 const libAlias = path.resolve(__dirname, 'src/lib');
 
 export default defineConfig({
-  plugins: [svelte()],
+  plugins: [svelte(), svelteTesting()],
   resolve: {
     alias: {
       $lib: libAlias,
     },
+    ...(process.env.VITEST ? { conditions: ['browser'] } : {}),
   },
   clearScreen: false,
   server: {