chore(build): bump Vite build target to ES2020 and update compatibility docs

README.md

@@ -112,7 +112,7 @@ The UI language is automatically detected from browser settings and can be manua
 
 ## Browser Compatibility
 
-- Build target: `ES2015`
+- Build target: `ES2020`
 - Supports modern browsers (Chrome, Firefox, Safari, Edge)
 - Responsive layout for mobile and tablet access
 

README_CN.md

@@ -111,7 +111,7 @@ npm run build
 
 ## 浏览器兼容性
 
-- 构建目标：`ES2015`
+- 构建目标：`ES2020`
 - 支持 Chrome、Firefox、Safari、Edge 等现代浏览器
 - 支持移动端响应式布局，可通过手机/平板访问
 

vite.config.ts

@@ -63,7 +63,7 @@ export default defineConfig({
     }
   },
   build: {
-    target: 'es2015',
+    target: 'es2020',
     outDir: 'dist',
     assetsInlineLimit: 100000000,
     chunkSizeWarningLimit: 100000000,