feat: Allow Direct Connect through the sign in screen

https://harperdb.atlassian.net/browse/STUDIO-583

Author: dawsontoth

src/features/cluster/InstanceLogInCell.tsx

@@ -16,6 +16,7 @@ export function InstanceLogInCell({ instance }: { readonly instance: Instance })
 	const operationsUrl = useMemo(() => getOperationsUrlForInstance(instance), [instance]);
 	const instanceClient = useInstanceClient(operationsUrl);
 	const { update } = useOrganizationClusterInstancePermissions();
+	const isFabricConnect = authStore.checkForFabricConnect(instance.id);
 
 	const onSignOutClick = useCallback(async () => {
 		await onInstanceLogoutSubmit({ instanceClient, entityId: instance.id });
@@ -26,7 +27,7 @@ export function InstanceLogInCell({ instance }: { readonly instance: Instance })
 		return <LoaderCircleIcon className="animate-spin" color="gray" />;
 	}
 
-	if (!instanceUser) {
+	if (!instanceUser || isFabricConnect) {
 		return <span className="flex gap-4">
 			{update && <Link
 				to={`../instance/${instance.id}${defaultInstanceRoute}`}

src/features/cluster/routes.ts

@@ -1,5 +1,6 @@
 import { defaultInstanceRouteUpOne } from '@/config/constants';
 import { ClusterInstanceSignIn } from '@/features/auth/ClusterInstanceSignIn';
+import { authStore } from '@/features/auth/store/authStore';
 import { createRoute, redirect } from '@tanstack/react-router';
 import { clusterLayoutRoute } from './clusterLayoutRoute';
 import { FinishSetup } from './FinishSetup';
@@ -30,7 +31,8 @@ const clusterSignInRoute = createRoute({
 	path: 'sign-in',
 	component: ClusterInstanceSignIn,
 	beforeLoad: ({ context, location, params }) => {
-		if (context.authentication[params.clusterId]?.user) {
+		const isFabricConnect = authStore.checkForFabricConnect(params.clusterId);
+		if (context.authentication[params.clusterId]?.user && !isFabricConnect) {
 			const search: Record<string, string> = location?.search;
 			throw redirect({
 				to: search?.redirect?.startsWith('/')
@@ -46,7 +48,11 @@ const instanceSignInRoute = createRoute({
 	path: 'instance/$instanceId/sign-in',
 	component: ClusterInstanceSignIn,
 	beforeLoad: ({ context, location, params }) => {
-		if (context.authentication[params.instanceId || params.clusterId]?.user) {
+		const isFabricConnect = authStore.checkForFabricConnect(params.clusterId);
+		if (isFabricConnect) {
+			return;
+		}
+		if (context.authentication[params.instanceId]?.user || context.authentication[params.clusterId]?.user) {
 			const search: Record<string, string> = location?.search;
 			throw redirect({
 				to: search?.redirect?.startsWith('/')