feat: more cleanup work in UI

vitest.config.ts

@@ -1,20 +1,28 @@
 import { defineConfig } from 'vitest/config';
 import path from 'path';
+import react from '@vitejs/plugin-react';
 
 export default defineConfig({
+  plugins: [react()],
   test: {
     globals: true,
-    environment: 'node',
-    include: ['src/**/*.test.ts', 'tests/**/*.test.ts'],
+    // Use jsdom for React component tests, node for main process tests
+    environment: 'jsdom',
+    environmentMatchGlobs: [
+      // Use node environment for main process engine tests
+      ['tests/engine/**', 'node'],
+    ],
+    include: ['src/**/*.test.ts', 'src/**/*.test.tsx', 'tests/**/*.test.ts', 'tests/**/*.test.tsx'],
     exclude: ['node_modules', 'dist'],
     coverage: {
       provider: 'v8',
       reporter: ['text', 'json', 'html'],
-      include: ['src/main/**/*.ts'],
+      include: ['src/main/**/*.ts', 'src/renderer/**/*.ts', 'src/renderer/**/*.tsx'],
       exclude: [
         'src/main/main.ts',
         'src/main/preload.ts',
         'src/**/*.test.ts',
+        'src/**/*.test.tsx',
       ],
     },
     setupFiles: ['./tests/setup.ts'],