chore: 添加 vitest.config.ts — 排除 e2e 测试目录，配置 @/ 路径别名

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

vitest.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'vitest/config';
+import path from 'node:path';
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, 'src'),
+    },
+  },
+  test: {
+    exclude: ['e2e/**', 'node_modules/**', 'src-tauri/**'],
+  },
+});