docs: 新增西班牙语和日语README并优化多语言文档

新增README-ES.md（西班牙语）和README-JA.md（日语）文档，完善多语言README互链。优化各语言README徽章、技术栈、外链格式及语言切换区，提升文档一致性与可读性。

src/locales/index.ts

@@ -1,14 +1,73 @@
+// 默认语言（打包在主包中）
 import zhCN from './zh-CN'
-import zhTW from './zh-TW'
-import en from './en'
-import de from './de'
-import ru from './ru'
-import ko from './ko'
-import ja from './ja'
 
-export type Locale = 'zh-CN' | 'zh-TW' | 'en' | 'de' | 'ru' | 'ko' | 'ja'
+export type Locale = 'zh-CN' | 'zh-TW' | 'en' | 'de' | 'ru' | 'ko' | 'ja' | 'es-LA'
 
-export const locales = { 'zh-CN': zhCN, 'zh-TW': zhTW, en, de, ru, ko, ja }
+export type TranslationSchema = typeof zhCN
+
+// 语言加载器 - 使用动态导入实现按需加载
+// 注意: 各语言文件可能有细微差异，缺失的键会在运行时回退到 key 本身
+type LocaleModule = { default: TranslationSchema }
+const localeLoaders: Record<Locale, () => Promise<LocaleModule>> = {
+  'zh-CN': () => Promise.resolve({ default: zhCN }),
+  'zh-TW': () => import('./zh-TW') as unknown as Promise<LocaleModule>,
+  en: () => import('./en') as unknown as Promise<LocaleModule>,
+  de: () => import('./de') as unknown as Promise<LocaleModule>,
+  ru: () => import('./ru') as unknown as Promise<LocaleModule>,
+  ko: () => import('./ko') as unknown as Promise<LocaleModule>,
+  ja: () => import('./ja') as unknown as Promise<LocaleModule>,
+  'es-LA': () => import('./es-LA') as unknown as Promise<LocaleModule>
+}
+
+// 已加载的语言缓存
+const loadedLocales: Partial<Record<Locale, TranslationSchema>> = {
+  'zh-CN': zhCN // 默认语言预加载
+}
+
+/**
+ * 异步加载指定语言
+ * @param locale 语言代码
+ * @returns 语言翻译对象
+ */
+export const loadLocale = async (locale: Locale): Promise<TranslationSchema> => {
+  // 如果已经加载过，直接返回缓存
+  if (loadedLocales[locale]) {
+    return loadedLocales[locale]!
+  }
+
+  // 动态加载语言文件
+  const loader = localeLoaders[locale]
+  if (!loader) {
+    console.warn(`Locale "${locale}" not found, falling back to zh-CN`)
+    return zhCN
+  }
+
+  try {
+    const module = await loader()
+    loadedLocales[locale] = module.default
+    return module.default
+  } catch (error) {
+    console.error(`Failed to load locale "${locale}":`, error)
+    return zhCN
+  }
+}
+
+/**
+ * 同步获取已加载的语言（如果未加载则返回默认语言）
+ * @param locale 语言代码
+ * @returns 语言翻译对象
+ */
+export const getLocale = (locale: Locale): TranslationSchema => {
+  return loadedLocales[locale] || zhCN
+}
+
+/**
+ * 检查语言是否已加载
+ * @param locale 语言代码
+ */
+export const isLocaleLoaded = (locale: Locale): boolean => {
+  return locale in loadedLocales
+}
 
 export const localeNames: Record<Locale, string> = {
   'zh-CN': '简体中文',
@@ -17,7 +76,8 @@ export const localeNames: Record<Locale, string> = {
   de: 'Deutsch',
   ru: 'Русский',
   ko: '한국어',
-  ja: '日本語'
+  ja: '日本語',
+  'es-LA': 'Español (LA)'
 }
 
 /**
@@ -44,10 +104,9 @@ export const detectBrowserLocale = (): Locale => {
     return 'de'
   } else if (lang.startsWith('ru')) {
     return 'ru'
+  } else if (lang.startsWith('es')) {
+    return 'es-LA'
   }
-
   // 默认返回简体中文
   return 'zh-CN'
 }
-
-export type TranslationSchema = typeof zhCN