feat(auth): 同步discord配置

src/lib/oauth/discord.ts

@@ -17,9 +17,12 @@ export interface DiscordTokenResponse {
 export const discordOAuth = {
   // 获取Discord授权URL
   getAuthUrl: (state?: string): string => {
+    // 优先使用配置的公网地址，开发环境使用当前域名
+    const baseUrl = process.env.NEXT_PUBLIC_APP_URL || window.location.origin;
+
     const params = new URLSearchParams({
       client_id: process.env.NEXT_PUBLIC_DISCORD_CLIENT_ID!,
-      redirect_uri: `${window.location.origin}/api/auth/discord/callback`,
+      redirect_uri: `${baseUrl}/api/auth/discord/callback`,
       response_type: 'code',
       scope: ['identify', 'email'].join(' '),
       ...(state && { state }),