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src/constants/portal.js

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+/**
+ * 子账号注册/登录为 /sub/auth/*，与主站同前端；VITE_IS_SUB_PORTAL=true 时仅多一层「根进子账号登录 + 侧栏子账号壳」
+ */
+export const isSubPortal = import.meta.env.VITE_IS_SUB_PORTAL === 'true'
+
+const trimTrailingSlash = (value = '') => value.replace(/\/+$/, '')
+
+export const subPortalBaseURL = trimTrailingSlash(import.meta.env.VITE_SUB_PORTAL_BASE_URL || '')
+export const mainPortalBaseURL = trimTrailingSlash(import.meta.env.VITE_MAIN_PORTAL_BASE_URL || '')
+
+const getOrigin = (url) => {
+  if (!url) return ''
+  try {
+    return new URL(url).origin
+  } catch {
+    return ''
+  }
+}
+
+export const subPortalOrigin = getOrigin(subPortalBaseURL)
+export const mainPortalOrigin = getOrigin(mainPortalBaseURL)
+export const isPortalDomainConfigReady = Boolean(subPortalOrigin && mainPortalOrigin)
+
+export const isCurrentOrigin = (origin) => {
+  if (!origin || typeof window === 'undefined') return false
+  return window.location.origin === origin
+}