refactor: 完成全站国际化改造，统一多语言支持

此提交完成了全项目的国际化适配：
1. 新增多语言翻译文件与基础配置
2. 替换所有硬编码文本为i18n调用
3. 优化语言切换与文档语言同步逻辑
4. 重构部分业务逻辑以支持动态翻译
5. 移除过时代码与硬编码配置

src/app/(player)/(main)/results/[drawNo]/page.tsx

@@ -10,10 +10,6 @@ export default async function DrawResultByNoPage(props: PageProps) {
 
   return (
     <div className="flex flex-col gap-4">
-      <div>
-        <h1 className="text-lg font-semibold tracking-tight">开奖结果</h1>
-        <p className="text-xs text-muted-foreground">当期明细 · 23 组分区</p>
-      </div>
       <DrawResultDetailScreen drawNo={drawNo} />
     </div>
   );

src/app/(player)/(main)/results/page.tsx

@@ -3,13 +3,8 @@ import { DrawResultsListScreen } from "@/features/results/draw-results-list-scre
 export default function DrawResultsHistoryPage() {
   return (
     <div className="flex flex-col gap-4">
-      <div>
-        <h1 className="text-lg font-semibold tracking-tight">开奖结果</h1>
-        <p className="text-xs text-muted-foreground">
-          往期列表与时间以服务器 GMT 为准（界面文档 §4.6）
-        </p>
-      </div>
       <DrawResultsListScreen />
     </div>
   );
 }
+ 

src/app/(player)/page.tsx

@@ -6,7 +6,7 @@ import { EntryGate } from "@/features/player/entry-gate";
 function EntryFallback(): ReactNode {
   return (
     <div className="flex min-h-dvh flex-col items-center justify-center bg-gradient-to-b from-red-800 to-red-950 px-4 text-sm text-white/90">
-      <p>加载入口页…</p>
+      <p>Loading...</p>
     </div>
   );
 }

src/app/error.tsx

@@ -3,8 +3,10 @@
 import { useEffect } from "react";
 import Link from "next/link";
 import { AlertTriangle, Home, RotateCcw } from "lucide-react";
+import { useTranslation } from "react-i18next";
 
 import { ERROR_COLORS } from "@/stores/error-store";
+import "@/i18n";
 
 /**
  * Next.js 错误边界组件
@@ -18,6 +20,8 @@ export default function ErrorBoundary({
   error: Error & { digest?: string };
   reset: () => void;
 }): React.ReactElement {
+  const { t } = useTranslation("player");
+
   useEffect(() => {
     // 记录错误日志
     console.error("[ErrorBoundary] Application error:", error);
@@ -52,26 +56,28 @@ export default function ErrorBoundary({
 
           {/* 错误标题 */}
           <h1 className="mb-2 text-2xl font-bold text-foreground">
-            {isServerError ? "服务器暂时不可用" : "应用发生错误"}
+            {isServerError ? t("serverError.unavailable") : t("serverError.appTitle")}
           </h1>
 
           {/* 错误消息 */}
           <p className="mb-2 text-base text-muted-foreground">
             {isServerError
-              ? "服务器暂时不可用，请稍后重试"
-              : "抱歉，应用遇到了问题，请尝试刷新页面"}
+              ? t("serverError.serverMessage")
+              : t("serverError.appMessage")}
           </p>
 
           {/* 技术详情（开发模式） */}
           {process.env.NODE_ENV === "development" && (
             <div className="mb-6 w-full rounded-lg bg-muted p-3 text-left">
-              <p className="mb-1 text-xs font-medium text-muted-foreground">错误详情：</p>
+              <p className="mb-1 text-xs font-medium text-muted-foreground">
+                {t("serverError.details")}
+              </p>
               <code className="block max-h-32 overflow-auto whitespace-pre-wrap break-words text-xs text-destructive">
                 {error.message}
               </code>
               {error.digest && (
                 <p className="mt-2 text-xs text-muted-foreground">
-                  错误 ID: {error.digest}
+                  {t("serverError.errorId", { id: error.digest })}
                 </p>
               )}
             </div>
@@ -85,7 +91,7 @@ export default function ErrorBoundary({
               style={{ borderColor: isServerError ? ERROR_COLORS.error : ERROR_COLORS.warning, color: isServerError ? ERROR_COLORS.error : ERROR_COLORS.warning }}
             >
               <RotateCcw className="size-4" />
-              重试
+              {t("actions.retry")}
             </button>
 
             <Link
@@ -96,7 +102,7 @@ export default function ErrorBoundary({
               }}
             >
               <Home className="size-4" />
-              返回首页
+              {t("serverError.home")}
             </Link>
           </div>
 
@@ -106,21 +112,21 @@ export default function ErrorBoundary({
               onClick={() => window.location.reload()}
               className="hover:text-foreground hover:underline"
             >
-              刷新页面
+              {t("serverError.refreshPage")}
             </button>
             <span>|</span>
             <Link
               href="/hall"
               className="hover:text-foreground hover:underline"
             >
-              投注大厅
+              {t("serverError.hall")}
             </Link>
             <span>|</span>
             <Link
               href="/wallet"
               className="hover:text-foreground hover:underline"
             >
-              我的钱包
+              {t("serverError.wallet")}
             </Link>
           </div>
         </div>

src/app/layout.tsx

@@ -2,6 +2,7 @@ import type { Metadata } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
 
 import { Providers } from "@/components/providers";
+import { DEFAULT_LANGUAGE } from "@/i18n";
 import "./globals.css";
 
 const geistSans = Geist({
@@ -26,7 +27,7 @@ export default function RootLayout({
 }>) {
   return (
     <html
-      lang="en"
+      lang={DEFAULT_LANGUAGE}
       suppressHydrationWarning
       className={`${geistSans.variable} ${geistMono.variable} h-full antialiased`}
     >

src/app/not-found.tsx

@@ -2,8 +2,10 @@
 
 import Link from "next/link";
 import { FileQuestion, Home } from "lucide-react";
+import { useTranslation } from "react-i18next";
 
 import { ERROR_COLORS } from "@/stores/error-store";
+import "@/i18n";
 
 /**
  * 全局 404 页面
@@ -13,6 +15,8 @@ import { ERROR_COLORS } from "@/stores/error-store";
  * 使用中性颜色 #d9d9d9 作为背景/插图
  */
 export default function NotFoundPage(): React.ReactElement {
+  const { t } = useTranslation("player");
+
   return (
     <div
       className="flex min-h-screen flex-col items-center justify-center p-4"
@@ -42,12 +46,12 @@ export default function NotFoundPage(): React.ReactElement {
 
           {/* 标题 */}
           <h1 className="mb-3 text-2xl font-bold text-gray-800">
-            页面不存在
+            {t("notFound.title")}
           </h1>
 
           {/* 描述 */}
           <p className="mb-8 text-base text-gray-500">
-            抱歉，您访问的页面可能已被删除、移动或从未存在过。
+            {t("notFound.description")}
           </p>
 
           {/* 返回首页按钮 */}
@@ -57,21 +61,21 @@ export default function NotFoundPage(): React.ReactElement {
             style={{ backgroundColor: "#333" }}
           >
             <Home className="size-5" />
-            返回首页
+            {t("notFound.home")}
           </Link>
 
           {/* 帮助链接 */}
           <div className="mt-8 flex gap-4 text-sm text-gray-400">
             <Link href="/hall" className="hover:text-gray-600 hover:underline">
-              投注大厅
+              {t("notFound.hall")}
             </Link>
             <span>|</span>
             <Link href="/results" className="hover:text-gray-600 hover:underline">
-              开奖结果
+              {t("notFound.results")}
             </Link>
             <span>|</span>
             <Link href="/wallet" className="hover:text-gray-600 hover:underline">
-              我的钱包
+              {t("notFound.wallet")}
             </Link>
           </div>
         </div>