feat: add registration link on sign-in page

Login page now shows "Don't have an account? Create a new account"
link to /sign-up when registration is enabled, replacing the old
"Contact tenant operator" mailto link.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

heicode/web/default/src/features/auth/sign-in/index.tsx

@@ -1,12 +1,21 @@
-import { useSearch } from '@tanstack/react-router'
+import { Link, useSearch } from '@tanstack/react-router'
 import { useTranslation } from 'react-i18next'
 import { ArrowUpRight } from 'lucide-react'
+import { useStatus } from '@/hooks/use-status'
 import { AuthLayout } from '../auth-layout'
 import { UserAuthForm } from './components/user-auth-form'
 
 export function SignIn() {
   const { t } = useTranslation()
   const { redirect } = useSearch({ from: '/(auth)/sign-in' })
+  const { status } = useStatus()
+
+  const registerEnabled =
+    status?.register_enabled ??
+    status?.data?.register_enabled ??
+    status?.password_register_enabled ??
+    status?.data?.password_register_enabled ??
+    true
 
   return (
     <AuthLayout>
@@ -47,6 +56,21 @@ export function SignIn() {
         <UserAuthForm redirectTo={redirect} />
 
         <div className='space-y-3 border-t border-dashed border-[color-mix(in_oklch,var(--primary)_22%,var(--border))] pt-5'>
+          {registerEnabled ? (
+            <>
+              <p className='text-xs font-semibold tracking-[0.16em] text-muted-foreground uppercase'>
+                {t("Don't have an account?")}
+              </p>
+              <Link
+                to='/sign-up'
+                className='inline-flex items-center gap-1 text-sm font-medium text-primary hover:underline'
+              >
+                {t('Create a new account')}
+                <ArrowUpRight className='h-3.5 w-3.5' />
+              </Link>
+            </>
+          ) : (
+            <>
               <p className='text-xs font-semibold tracking-[0.16em] text-muted-foreground uppercase'>
                 {t('Need access?')}
               </p>
@@ -55,13 +79,8 @@ export function SignIn() {
                   'Account provisioning is handled by your platform administrator. Reach out to the Heicode operator to be added to a tenant.'
                 )}
               </p>
-          <a
-            href='mailto:operators@heicode.local'
-            className='inline-flex items-center gap-1 text-sm font-medium text-primary hover:underline'
-          >
-            {t('Contact tenant operator')}
-            <ArrowUpRight className='h-3.5 w-3.5' />
-          </a>
+            </>
+          )}
         </div>
       </div>
     </AuthLayout>