feat: 接入玩家入口与API代理

- 新增 /api 重写代理，支持 LOTTERY_API_PROXY_TARGET 配置
- 玩家首页切换为 EntryGate，并移除 layout 对 PlayerAppShell 的包裹
- 请求层拆分语言头与玩家鉴权注入逻辑，引入 zustand 依赖
- 允许提交 .env.example 供本地配置参考

src/lib/lottery-http.ts

@@ -1,52 +1,17 @@
 import axios, {
-  AxiosHeaders,
   isAxiosError,
   type AxiosRequestConfig,
   type AxiosResponse,
 } from "axios";
 
+import { withPlayerAuthHeader } from "@/lib/lottery-auth";
+import { withLotteryLocaleHeaders } from "@/lib/lottery-locale";
 import {
   LotteryApiBizError,
   LotteryApiEnvelopeError,
 } from "@/types/api/errors";
 import { isApiEnvelope } from "@/types/api/envelope";
 
-export function setLotteryRequestLocale(locale: string | null): void {
-  if (locale === null) {
-    overrideLocale = null;
-    return;
-  }
-  const p = locale.trim().toLowerCase().split("-")[0] ?? "";
-  overrideLocale =
-    p === "zh" || p === "en" || p === "ne" ? (p as "zh" | "en" | "ne") : null;
-}
-
-let overrideLocale: "zh" | "en" | "ne" | null = null;
-
-function requestLocale(): "zh" | "en" | "ne" {
-  if (overrideLocale) {
-    return overrideLocale;
-  }
-  if (typeof document !== "undefined") {
-    const tag = document.documentElement.lang.trim().toLowerCase();
-    const primary = tag.split("-")[0] ?? tag;
-    if (primary === "zh" || primary === "en" || primary === "ne") {
-      return primary;
-    }
-  }
-  return "en";
-}
-
-function acceptLanguage(loc: ReturnType<typeof requestLocale>): string {
-  if (loc === "zh") {
-    return "zh-CN,zh;q=0.9,en;q=0.8";
-  }
-  if (loc === "ne") {
-    return "ne,ne-NP;q=0.9,en;q=0.8";
-  }
-  return "en-US,en;q=0.9";
-}
-
 const baseURL = process.env.NEXT_PUBLIC_LOTTERY_API_BASE_URL?.trim();
 
 /**
@@ -58,21 +23,6 @@ export const lotteryHttp = axios.create({
   headers: { Accept: "application/json" },
 });
 
-function mergeLocaleHeaders(
-  config: AxiosRequestConfig,
-): AxiosRequestConfig {
-  const loc = requestLocale();
-  const merged: AxiosRequestConfig = { ...config };
-  // Axios 的 RequestConfig.headers 类型比 concat 能接受的头对象更窄
-  const headers = AxiosHeaders.concat(
-    merged.headers as Parameters<typeof AxiosHeaders.concat>[0],
-  );
-  headers.set("X-Locale", loc);
-  headers.set("Accept-Language", acceptLanguage(loc));
-  merged.headers = headers;
-  return merged;
-}
-
 /**
  * 对 **payload**（通常是 `response.data`）校验信封并成功时返回 `data`；
  * `code !== 0` 抛 {@link LotteryApiBizError}。
@@ -93,11 +43,11 @@ export function unwrapResponse<T>(res: AxiosResponse<unknown>): T {
 }
 
 /**
- * **第二层**：自动带语言头，用 `lotteryHttp` 发请求，再 `unwrapResponse`。
+ * **第二层**：补齐玩家鉴权与语言头，用 `lotteryHttp` 发请求，再 `unwrapResponse`。
  * 是否提示用户由各页面/特性自己 `catch` 决定。
  */
 export async function request<T>(config: AxiosRequestConfig): Promise<T> {
-  const merged = mergeLocaleHeaders(config);
+  const merged = withPlayerAuthHeader(withLotteryLocaleHeaders(config));
   try {
     const res = await lotteryHttp.request<unknown>(merged);
     return unwrapResponse<T>(res);
@@ -139,4 +89,4 @@ export const lotteryRequest = {
     data?: unknown,
     config?: Omit<AxiosRequestConfig, "url" | "method" | "data">,
   ) => request<T>({ ...config, url, method: "PATCH", data }),
-};
+};