FEATURE: Setting for short title used by Android on homescreen

app/controllers/metadata_controller.rb

@@ -27,7 +27,6 @@ class MetadataController < ApplicationController
 
     manifest = {
       name: SiteSetting.title,
-      short_name: SiteSetting.title,
       display: display,
       start_url: Discourse.base_uri.present? ? "#{Discourse.base_uri}/" : '.',
       background_color: "##{ColorScheme.hex_for_name('secondary', view_context.scheme_id)}",
@@ -41,6 +40,8 @@ class MetadataController < ApplicationController
       ]
     }
 
+    manifest[:short_name] = SiteSetting.short_title if SiteSetting.short_title.present?
+
     if SiteSetting.native_app_install_banner
       manifest = manifest.merge(
         prefer_related_applications: true,

config/locales/server.en.yml

@@ -1856,6 +1856,8 @@ en:
     push_notifications_prompt: "Display user consent prompt."
     push_notifications_icon: "The badge icon that appears in the notification corner. Recommended size is 96px by 96px."
 
+    short_title: "The short title will be used on the user's home screen, launcher, or other places where space may be limited. A maximum of 12 characters is recommended."
+
     errors:
       invalid_email: "Invalid email address."
       invalid_username: "There's no user with that username."

config/site_settings.yml

@@ -281,6 +281,8 @@ basic:
   push_notifications_icon_url:
     hidden: true
     default: ''
+  short_title:
+    default: ''
   vapid_public_key_bytes:
     default: ''
     client: true

spec/requests/metadata_controller_spec.rb

@@ -63,6 +63,19 @@ RSpec.describe MetadataController do
       expect(manifest["display"]).to eq("standalone")
     end
 
+    it 'uses the short_title if it is set' do
+      get "/manifest.webmanifest"
+      expect(response.status).to eq(200)
+      manifest = JSON.parse(response.body)
+      expect(manifest).to_not have_key("short_name")
+
+      SiteSetting.short_title = "foo"
+
+      get "/manifest.webmanifest"
+      expect(response.status).to eq(200)
+      manifest = JSON.parse(response.body)
+      expect(manifest["short_name"]).to eq("foo")
+    end
   end
 
   describe 'opensearch.xml' do