refactor: enhance forward authentication UI and API integration

- Updated the alert block in the HandleForwardAuth component to provide clearer requirements for deploying the authentication proxy.
- Added a DnsHelperModal to assist with DNS configuration in the ForwardAuthServers component.
- Refined API input schemas for forward authentication operations to improve type safety and clarity.
- Removed the obsolete forward-auth SSO design document to streamline documentation.

These changes improve the user experience and maintainability of the forward authentication feature across the application.

packages/server/src/db/schema/forward-auth.ts

@@ -47,6 +47,14 @@ export const forwardAuthSettingsRelations = relations(
 
 const domainRegex = /^(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z]{2,}$/;
 
+export const apiForwardAuthServerTarget = z.object({
+	serverId: z.string().nullable(),
+});
+
+export const apiForwardAuthDomainTarget = z.object({
+	domainId: z.string().min(1),
+});
+
 export const apiSetForwardAuthSettings = z.object({
 	serverId: z.string().nullable(),
 	authDomain: z
@@ -60,3 +68,8 @@ export const apiSetForwardAuthSettings = z.object({
 		.default("letsencrypt"),
 	customCertResolver: z.string().optional(),
 });
+
+export const apiDeployForwardAuthOnServer = z.object({
+	serverId: z.string().nullable(),
+	providerId: z.string().min(1),
+});

packages/server/src/services/proprietary/forward-auth.ts

@@ -1,3 +1,4 @@
+import { IS_CLOUD } from "@dokploy/server/constants";
 import { db } from "@dokploy/server/db";
 import {
 	forwardAuthSettings,
@@ -253,13 +254,29 @@ export const getForwardAuthServerStatus = async (organizationId: string) => {
 			isNotNull(server.sshKeyId),
 			eq(server.serverType, "deploy"),
 		),
-		columns: { serverId: true, name: true },
+		columns: { serverId: true, name: true, ipAddress: true },
 		orderBy: [desc(server.createdAt)],
 	});
 
-	const targets: { serverId: string | null; name: string }[] = [
-		{ serverId: null, name: "Dokploy Server (local)" },
-		...servers.map((s) => ({ serverId: s.serverId, name: s.name })),
+	const targets: {
+		serverId: string | null;
+		name: string;
+		ipAddress: string | null;
+	}[] = [
+		...(IS_CLOUD
+			? []
+			: [
+					{
+						serverId: null,
+						name: "Dokploy Server (local)",
+						ipAddress: null,
+					},
+				]),
+		...servers.map((s) => ({
+			serverId: s.serverId,
+			name: s.name,
+			ipAddress: s.ipAddress,
+		})),
 	];
 
 	return Promise.all(