工具完成

src/composables/useLanguage.ts

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+import { ref, computed } from 'vue'
+import type { Language } from '@/types/tools'
+import { locales } from '@/config/i18n'
+
+// 全局语言状态
+const currentLanguage = ref<Language>('zh')
+
+export const useLanguage = () => {
+  // 获取当前语言的翻译对象
+  const translation = computed(() => locales[currentLanguage.value])
+  
+  // 翻译函数
+  const t = (key: string, params?: Record<string, string>) => {
+    const keys = key.split('.')
+    let value: any = translation.value
+    
+    for (const k of keys) {
+      value = value?.[k]
+    }
+    
+    let result = value || key
+    
+    // 替换参数
+    if (params && typeof result === 'string') {
+      Object.keys(params).forEach(param => {
+        result = result.replace(`{${param}}`, params[param])
+      })
+    }
+    
+    return result
+  }
+  
+  // 切换语言
+  const switchLanguage = (lang: Language) => {
+    currentLanguage.value = lang
+    localStorage.setItem('preferred-language', lang)
+  }
+  
+  // 从本地存储恢复语言
+  const restoreLanguage = () => {
+    const saved = localStorage.getItem('preferred-language') as Language
+    if (saved && (saved === 'zh' || saved === 'en')) {
+      currentLanguage.value = saved
+    }
+  }
+  
+  return {
+    language: currentLanguage,
+    t,
+    switchLanguage,
+    restoreLanguage
+  }
+}