feat: 添加国际化支持，更新相关配置和组件，优化余额格式化

src/locales/index.ts

@@ -0,0 +1,16 @@
+import { createI18n } from "vue-i18n";
+import enUS from "./en-US.json";
+import zhCN from "./zh-CN.json";
+
+export type MessageSchema = typeof enUS;
+
+const i18n = createI18n<MessageSchema, "en-US" | "zh-CN">({
+  locale: "en-US",
+  fallbackLocale: "en-US",
+  messages: {
+    "en-US": enUS,
+    "zh-CN": zhCN,
+  },
+});
+
+export { i18n };