FEATURE: Add hot as a homepage option (#25325)

app/assets/javascripts/discourse/app/controllers/preferences/interface.js

@@ -44,6 +44,10 @@ export default Controller.extend({
     this._super(...arguments);
 
     this.set("selectedDarkColorSchemeId", this.session.userDarkSchemeId);
+
+    if (this.siteSettings.experimental_hot_topics) {
+      USER_HOMES[8] = "hot";
+    }
   },
 
   @discourseComputed("makeThemeDefault")

app/models/user_option.rb

@@ -185,6 +185,12 @@ class UserOption < ActiveRecord::Base
       "bookmarks"
     when 7
       "unseen"
+    when 8
+      if SiteSetting.experimental_hot_topics
+        "hot"
+      else
+        SiteSetting.homepage
+      end
     else
       SiteSetting.homepage
     end