FIX: Respect homepage prefs on admin sidebar Back to Forum link (#25642)

app/assets/javascripts/discourse/app/lib/sidebar/admin-sidebar.js

@@ -4,6 +4,7 @@ import BaseCustomSidebarPanel from "discourse/lib/sidebar/base-custom-sidebar-pa
 import BaseCustomSidebarSection from "discourse/lib/sidebar/base-custom-sidebar-section";
 import BaseCustomSidebarSectionLink from "discourse/lib/sidebar/base-custom-sidebar-section-link";
 import { ADMIN_PANEL } from "discourse/lib/sidebar/panels";
+import { defaultHomepage } from "discourse/lib/utilities";
 import { getOwnerWithFallback } from "discourse-common/lib/get-owner";
 import I18n from "discourse-i18n";
 
@@ -109,7 +110,7 @@ export function useAdminNavConfig(navMap) {
       links: [
         {
           name: "back_to_forum",
-          route: "discovery.latest",
+          route: `discovery.${defaultHomepage()}`,
           label: "admin.back_to_forum",
           icon: "arrow-left",
         },

app/models/user_option.rb

@@ -1,6 +1,16 @@
 # frozen_string_literal: true
 
 class UserOption < ActiveRecord::Base
+  HOMEPAGES = {
+    1 => "latest",
+    2 => "categories",
+    3 => "unread",
+    4 => "new",
+    5 => "top",
+    6 => "bookmarks",
+    7 => "unseen",
+  }
+
   self.ignored_columns = [
     "disable_jump_reply", # Remove once 20210706091905 is promoted from post_deploy to regular migration
     "sidebar_list_destination", # TODO(osama): Remove in January 2024
@@ -170,30 +180,11 @@ class UserOption < ActiveRecord::Base
   end
 
   def homepage
-    case homepage_id
-    when 1
-      "latest"
-    when 2
-      "categories"
-    when 3
-      "unread"
-    when 4
-      "new"
-    when 5
-      "top"
-    when 6
-      "bookmarks"
-    when 7
-      "unseen"
-    when 8
-      if SiteSetting.experimental_hot_topics
-        "hot"
-      else
-        SiteSetting.homepage
-      end
-    else
-      SiteSetting.homepage
-    end
+    return HOMEPAGES[homepage_id] if HOMEPAGES.keys.include?(homepage_id)
+
+    return SiteSetting.experimental_hot_topics ? "hot" : SiteSetting.homepage if homepage_id == 8
+
+    SiteSetting.homepage
   end
 
   def text_size

spec/system/admin_revamp_sidebar_navigation_spec.rb

@@ -24,6 +24,14 @@ describe "Admin Revamp | Sidebar Navigation", type: :system do
     expect(sidebar).to have_no_section("admin-nav-section-root")
   end
 
+  it "respects the user homepage preference for the Back to Forum link" do
+    admin.user_option.update!(
+      homepage_id: UserOption::HOMEPAGES.find { |id, value| value == "categories" }.first,
+    )
+    visit("/admin")
+    expect(page).to have_link("Back to Forum", href: "/categories")
+  end
+
   context "when on mobile" do
     it "shows the admin sidebar links in the header-dropdown when navigating to an admin route and hides them when leaving",
        mobile: true do