add car reservation feature

apps/admin/src/app/dashboard/layout.tsx

@@ -8,15 +8,15 @@ import {
   AdminThemeSwitcher,
   useAdminI18n,
 } from '@/components/I18nProvider'
-
-const DASHBOARD_URL = process.env.NEXT_PUBLIC_DASHBOARD_URL ?? 'http://localhost:3001'
+import { resolveBrowserAppUrl } from '@/lib/appUrls'
 
 function buildUnifiedLoginUrl(nextPath: string) {
+  const dashboardUrl = resolveBrowserAppUrl(process.env.NEXT_PUBLIC_DASHBOARD_URL ?? 'http://localhost:3001')
   const params = new URLSearchParams({
     portal: 'admin',
     next: nextPath || '/dashboard',
   })
-  return `${DASHBOARD_URL}/sign-in?${params.toString()}`
+  return `${dashboardUrl}/sign-in?${params.toString()}`
 }
 
 const navLinks = [

apps/admin/src/app/login/page.tsx

@@ -1,7 +1,13 @@
+import { headers } from 'next/headers'
 import { redirect } from 'next/navigation'
-
-const DASHBOARD_URL = process.env.NEXT_PUBLIC_DASHBOARD_URL ?? 'http://localhost:3001'
+import { resolveServerAppUrl } from '@/lib/appUrls'
 
 export default function AdminLoginPage() {
-  redirect(`${DASHBOARD_URL}/sign-in?portal=admin&next=/dashboard`)
+  const requestHeaders = headers()
+  const dashboardUrl = resolveServerAppUrl(
+    process.env.NEXT_PUBLIC_DASHBOARD_URL ?? 'http://localhost:3001',
+    requestHeaders.get('host'),
+    requestHeaders.get('x-forwarded-proto'),
+  )
+  redirect(`${dashboardUrl}/sign-in?portal=admin&next=/dashboard`)
 }

apps/admin/src/lib/appUrls.ts

@@ -0,0 +1,25 @@
+export function resolveBrowserAppUrl(fallback: string): string {
+  if (typeof window === 'undefined') return fallback
+
+  try {
+    const target = new URL(fallback)
+    target.protocol = window.location.protocol
+    target.hostname = window.location.hostname
+    return target.toString().replace(/\/$/, '')
+  } catch {
+    return fallback
+  }
+}
+
+export function resolveServerAppUrl(fallback: string, host: string | null, proto?: string | null): string {
+  if (!host) return fallback
+
+  try {
+    const target = new URL(fallback)
+    target.protocol = `${proto || target.protocol.replace(':', '')}:`
+    target.host = host
+    return target.toString().replace(/\/$/, '')
+  } catch {
+    return fallback
+  }
+}