fix: don't show register when user signup is disabled

closes #1087

src/backend/src/services/PuterHomepageService.js

@@ -20,6 +20,7 @@
 const { PathBuilder } = require("../util/pathutil");
 const BaseService = require("./BaseService");
 const {is_valid_url} = require('../helpers');
+const { Endpoint } = require("../util/expressutil");
 
 /**
  * PuterHomepageService serves the initial HTML page that loads the Puter GUI
@@ -66,6 +67,20 @@ class PuterHomepageService extends BaseService {
     }
 
 
+    async ['__on_install.routes'] (_, { app }) {
+        Endpoint({
+            route: '/whoarewe',
+            methods: ['GET'],
+            handler: async (req, res) => {
+                res.json({
+                    disable_user_signup: this.global_config.disable_user_signup,
+                    disable_temp_users: this.global_config.disable_temp_users,
+                });
+            }
+        }).attach(app);
+    }
+
+
     /**
     * This method sends the initial HTML page that loads the Puter GUI and its assets.
     */

src/gui/src/UI/UIWindowLogin.js

@@ -70,6 +70,9 @@ async function UIWindowLogin(options){
                 h += `</form>`;
             h += `</div>`;
             // create account link
+            
+            // If show_signup_button is undefined, the default behavior is to show it.
+            // If show_signup_button is set to false, the button will not be shown.
             if(options.show_signup_button === undefined || options.show_signup_button){
                 h += `<div class="c2a-wrapper" style="padding:20px;">`;
                     h += `<button class="signup-c2a-clickable">${i18n('create_free_account')}</button>`;

src/gui/src/initgui.js

@@ -790,9 +790,13 @@ window.initgui = async function(options){
             UIWindowSessionList();
         }
         else{
+            const resp = await fetch(puter.defaultGUIOrigin + '/whoarewe');
+            const whoarewe = await resp.json();
             await UIWindowLogin({
+                // show_signup_button: 
                 reload_on_success: true,
                 send_confirmation_code: false,
+                show_signup_button: ( ! whoarewe.disable_user_signup ),
                 window_options:{
                     has_head: false
                 }