refactor: support i18n

web/lib/api/client.ts

@@ -1,4 +1,6 @@
 import { expireSession, readSession } from "@/lib/auth"
+import { readStoredLocale } from "@/i18n/config"
+import { translateCurrentMessage } from "@/i18n/messages"
 
 const API_BASE_URL =
   process.env.NEXT_PUBLIC_API_BASE_URL?.trim() || ""
@@ -22,7 +24,7 @@ async function parseResult<T>(response: Response) {
     if (payload.errorCode === 3000 || payload.errorCode === 3002) {
       expireSession()
     }
-    const error = new Error(payload.message || "请求失败")
+    const error = new Error(payload.message || translateCurrentMessage("api.requestFailed"))
     ;(error as Error & { errorCode?: number }).errorCode = payload.errorCode
     throw error
   }
@@ -49,6 +51,9 @@ export async function request<T>(
   ) {
     authHeaders.set("Content-Type", "application/json")
   }
+  const locale = readStoredLocale()
+  authHeaders.set("Accept-Language", locale)
+  authHeaders.set("X-Locale", locale)
 
   const requestBaseUrl = baseUrl !== undefined ? baseUrl : API_BASE_URL
   const response = await fetch(`${requestBaseUrl}${path}`, {