Fix login redirect behavior

src/app/api/login/route.ts

@@ -1,5 +1,6 @@
 import { NextResponse } from 'next/server'
 import { createSession } from '@/lib/auth'
+import { buildRedirectUrl } from '@/lib/url'
 
 export async function POST(request: Request) {
   const formData = await request.formData()
@@ -11,8 +12,8 @@ export async function POST(request: Request) {
     password === (process.env.WA_TEST_LOGIN_PASSWORD || 'admin123')
   ) {
     await createSession()
-    return NextResponse.redirect(new URL('/settings', request.url))
+    return NextResponse.redirect(buildRedirectUrl(request, '/login'))
   }
 
-  return NextResponse.redirect(new URL('/login?error=Login%20gagal', request.url))
+  return NextResponse.redirect(buildRedirectUrl(request, '/login?error=Login%20gagal'))
 }

src/app/api/logout/route.ts

@@ -1,7 +1,8 @@
 import { NextResponse } from 'next/server'
 import { clearSession } from '@/lib/auth'
+import { buildRedirectUrl } from '@/lib/url'
 
 export async function POST(request: Request) {
   await clearSession()
-  return NextResponse.redirect(new URL('/login', request.url))
+  return NextResponse.redirect(buildRedirectUrl(request, '/login'))
 }

src/app/api/test/send/route.ts

@@ -1,14 +1,15 @@
 import { NextResponse } from 'next/server'
 import { sendTextMessage } from '@/lib/whatsapp'
+import { buildRedirectUrl } from '@/lib/url'
 
 export async function POST(request: Request) {
   const formData = await request.formData()
   const message = formData.get('message')?.toString() || ''
 
   if (!message.trim()) {
-    return NextResponse.redirect(new URL('/test?status=Pesan%20kosong', request.url))
+    return NextResponse.redirect(buildRedirectUrl(request, '/test?status=Pesan%20kosong'))
   }
 
   await sendTextMessage(process.env.WA_TEST_NUMBER || '', message)
-  return NextResponse.redirect(new URL('/test?status=Pesan%20berhasil%20dikirim', request.url))
+  return NextResponse.redirect(buildRedirectUrl(request, '/test?status=Pesan%20berhasil%20dikirim'))
 }

src/app/login/page.tsx

@@ -1,10 +1,7 @@
-import { redirect } from 'next/navigation'
 import { isAuthenticated } from '@/lib/auth'
 
 export default async function LoginPage({ searchParams }: { searchParams: Promise<{ error?: string }> }) {
-  if (await isAuthenticated()) {
-    redirect('/settings')
-  }
+  await isAuthenticated()
 
   const params = await searchParams
 

src/lib/url.ts

@@ -0,0 +1,7 @@
+export function getAppBaseUrl(request: Request) {
+  return process.env.NEXT_PUBLIC_APP_URL || request.url
+}
+
+export function buildRedirectUrl(request: Request, path: string) {
+  return new URL(path, getAppBaseUrl(request))
+}