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/core.js

@@ -5,7 +5,7 @@
  * @description 重构后的核心模块，包含Toast类的优化实现
  */
 
-import { generateId, escapeHTML, prefersDark } from './utils.js';
+import { generateId, escapeHTML } from './utils.js';
 import { DEFAULTS, ICONS, TYPE_COLORS, THEMES } from './constants.js';
 import { injectStyles } from './styles.js';
 import { getTheme, applyTheme } from './themes.js';

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);
     },

src/styles.js

@@ -446,6 +446,9 @@ const generateCSS = (theme) => {
       .met-container {
         display: none !important;
       }
+      .met-toast {
+        display: none !important;
+      }
     }
     
     /* 高对比度模式 */
@@ -663,13 +666,6 @@ const generateCSS = (theme) => {
       }
     }
     
-    /* 打印时隐藏 */
-    @media print {
-      .met-toast {
-        display: none !important;
-      }
-    }
-    
     /* 滚动时固定位置 */
     .met-container {
       position: fixed;