fix: complete Chinese frontend localization

apps/web/src/utils/i18n.ts

@@ -3,6 +3,7 @@ import { i18n } from "@lingui/core";
 import type { Locale } from "~/locales";
 import { defaultLocale } from "~/locales";
 import { messages as enMessages } from "~/locales/en/messages";
+import { messages as zhCNMessages } from "~/locales/zh-CN/messages";
 
 const loadMessages = async (locale: Locale) => {
   switch (locale) {
@@ -34,11 +35,15 @@ const loadMessages = async (locale: Locale) => {
 let isInitialized = false;
 const loadedLocales = new Set<string>();
 
-export function initializeI18n(locale: Locale = defaultLocale) {
+export function initializeI18n() {
   if (!isInitialized) {
-    i18n.load(defaultLocale, enMessages);
+    // 首屏同步加载中英文，避免默认语言激活前出现中英混排。
+    i18n.load("en", enMessages);
+    i18n.load("zh-CN", zhCNMessages);
     i18n.activate(defaultLocale);
     loadedLocales.add(defaultLocale);
+    loadedLocales.add("en");
+    loadedLocales.add("zh-CN");
     isInitialized = true;
   }