feat: Add relay state for SAML SSO (#12597)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/v3/views/login/Index.vue

@@ -22,6 +22,8 @@ import MfaVerification from 'dashboard/components/auth/MfaVerification.vue';
 const ERROR_MESSAGES = {
   'no-account-found': 'LOGIN.OAUTH.NO_ACCOUNT_FOUND',
   'business-account-only': 'LOGIN.OAUTH.BUSINESS_ACCOUNTS_ONLY',
+  'saml-authentication-failed': 'LOGIN.SAML.API.ERROR_MESSAGE',
+  'saml-not-enabled': 'LOGIN.SAML.API.ERROR_MESSAGE',
 };
 
 const IMPERSONATION_URL_SEARCH_KEY = 'impersonation';

app/javascript/v3/views/login/Saml.vue

@@ -15,6 +15,10 @@ const props = defineProps({
     type: String,
     default: '',
   },
+  target: {
+    type: String,
+    default: 'web',
+  },
 });
 
 const store = useStore();
@@ -107,6 +111,7 @@ onMounted(async () => {
           name="authenticity_token"
           :value="csrfToken"
         />
+        <input type="hidden" class="h-0" name="target" :value="target" />
         <NextButton
           lg
           type="submit"

app/javascript/v3/views/routes.js

@@ -28,6 +28,7 @@ export default [
     meta: { requireEnterprise: true },
     props: route => ({
       authError: route.query.error,
+      target: route.query.target,
     }),
   },
   {