refactor(layout, i18n, admin): 优化布局结构与多语言支持

调整 AdminShell 组件的子组件顺序，提升代码可读性。更新 admin-breadcrumb 组件，简化导航标签翻译逻辑，确保多语言支持的一致性。重构 admin-language-switcher 组件，优化语言切换的用户体验，增强界面交互性。更新多语言配置，新增登录界面的副标题，提升用户体验。

src/lib/admin-http.ts

@@ -5,6 +5,10 @@ import axios, {
 } from "axios";
 
 import { withAdminAuthHeader } from "@/lib/admin-auth";
+import {
+  handleAdminAuthRejected,
+  isAdminAuthRejected,
+} from "@/lib/admin-auth-reject";
 import { withAdminLocaleHeaders } from "@/lib/admin-locale";
 import { LotteryApiBizError, LotteryApiEnvelopeError } from "@/types/api/errors";
 import { isApiEnvelope } from "@/types/api/envelope";
@@ -18,6 +22,23 @@ export const adminHttp = axios.create({
   headers: { Accept: "application/json" },
 });
 
+adminHttp.interceptors.response.use(
+  (response) => response,
+  (error: unknown) => {
+    if (isAdminAuthRejected(error)) {
+      handleAdminAuthRejected();
+    }
+    return Promise.reject(error);
+  },
+);
+
+function rejectAfterAuthCheck(err: unknown): never {
+  if (isAdminAuthRejected(err)) {
+    handleAdminAuthRejected();
+  }
+  throw err;
+}
+
 export function unwrapData<T>(payload: unknown): T {
   if (!isApiEnvelope(payload)) {
     throw new LotteryApiEnvelopeError();
@@ -48,7 +69,7 @@ export async function publicAdminRequest<T>(
         throw new LotteryApiBizError(body.msg, body.code, body.data);
       }
     }
-    throw err;
+    rejectAfterAuthCheck(err);
   }
 }
 
@@ -64,7 +85,7 @@ export async function request<T>(config: AxiosRequestConfig): Promise<T> {
         throw new LotteryApiBizError(body.msg, body.code, body.data);
       }
     }
-    throw err;
+    rejectAfterAuthCheck(err);
   }
 }