fix(#9,#16,#17): 移除未使用import; 合并重复CSS @media print; accessibility从i18n读取类型名

src/plugins.js

@@ -5,6 +5,8 @@
  * @description 插件管理器 + 3 款预设插件 (keyboard / persistence / accessibility)
  */
 
+import { t } from './i18n.js';
+
 /**
  * 插件管理器
  */
@@ -154,8 +156,8 @@ const presetPlugins = {
       el.setAttribute('aria-live', 'assertive');
       el.setAttribute('aria-atomic', 'true');
       el.style.cssText = 'position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;';
-      const typeNames = { success:'成功', error:'错误', warning:'警告', info:'信息', loading:'加载中', default:'通知' };
-      el.textContent = `${typeNames[toast.type] || '通知'}: ${toast.title || ''} ${toast.message || ''}`;
+      const typeName = t(toast.type) || toast.type;
+      el.textContent = `${typeName}: ${toast.title || ''} ${toast.message || ''}`;
       document.body.appendChild(el);
       setTimeout(() => { if (el.parentNode) el.parentNode.removeChild(el); }, 3000);
     },