feat(i18n): 创建 vue-i18n 实例与语言检测/切换核心模块

everything-is-suitable-uniapp/src/locales/index.ts

@@ -0,0 +1,87 @@
+import { createI18n } from 'vue-i18n'
+import zhCN from './zh-CN'
+import zhTW from './zh-TW'
+import en from './en'
+import ja from './ja'
+import ko from './ko'
+import de from './de'
+import fr from './fr'
+import es from './es'
+import pt from './pt'
+
+export const SUPPORTED_LOCALES = [
+  'zh-CN', 'zh-TW', 'en', 'ja', 'ko', 'de', 'fr', 'es', 'pt',
+] as const
+
+export type SupportedLocale = (typeof SUPPORTED_LOCALES)[number]
+
+export const localeNames: Record<SupportedLocale, string> = {
+  'zh-CN': '简体中文',
+  'zh-TW': '繁體中文',
+  'en': 'English',
+  'ja': '日本語',
+  'ko': '한국어',
+  'de': 'Deutsch',
+  'fr': 'Français',
+  'es': 'Español',
+  'pt': 'Português',
+}
+
+const STORAGE_KEY = 'preferred-locale'
+
+function detectLocale(): SupportedLocale {
+  const stored = uni.getStorageSync(STORAGE_KEY)
+  if (stored && SUPPORTED_LOCALES.includes(stored)) {
+    return stored as SupportedLocale
+  }
+
+  try {
+    const systemInfo = uni.getSystemInfoSync()
+    const lang = systemInfo.language || ''
+    const normalized = lang.replace(/_/g, '-').toLowerCase()
+
+    for (const locale of SUPPORTED_LOCALES) {
+      if (normalized.startsWith(locale.toLowerCase())) {
+        return locale
+      }
+    }
+
+    if (normalized.startsWith('zh')) {
+      if (normalized.includes('tw') || normalized.includes('hant')) {
+        return 'zh-TW'
+      }
+      return 'zh-CN'
+    }
+  } catch {
+    // getSystemInfoSync may fail in some environments
+  }
+
+  return 'zh-CN'
+}
+
+export function setLocale(locale: SupportedLocale): void {
+  if (!SUPPORTED_LOCALES.includes(locale)) return
+  uni.setStorageSync(STORAGE_KEY, locale)
+  i18n.global.locale.value = locale
+}
+
+export function getLocale(): SupportedLocale {
+  return i18n.global.locale.value as SupportedLocale
+}
+
+export const i18n = createI18n({
+  legacy: false,
+  locale: detectLocale(),
+  fallbackLocale: 'zh-CN',
+  messages: {
+    'zh-CN': zhCN,
+    'zh-TW': zhTW,
+    'en': en,
+    'ja': ja,
+    'ko': ko,
+    'de': de,
+    'fr': fr,
+    'es': es,
+    'pt': pt,
+  },
+})