DEV: Catch missing translations during test runs (#26258)

This configuration makes it so that a missing translation will raise an error during test execution. Better discover there than after deploy.

config/environments/test.rb

@@ -63,6 +63,9 @@ Discourse::Application.configure do
     },
   ]
 
+  # Catch missing translations during test runs.
+  config.i18n.raise_on_missing_translations = true
+
   config.after_initialize do
     ActiveRecord::LogSubscriber.backtrace_cleaner.add_silencer do |line|
       line =~ %r{lib/freedom_patches}

config/locales/server.en.yml

@@ -556,6 +556,7 @@ en:
   private_message_abbrev: "Msg"
 
   rss_description:
+    hot: "Hot topics"
     latest: "Latest topics"
     top: "Top topics"
     top_all: "All time top topics"
@@ -1472,6 +1473,7 @@ en:
       description: "External sources that have linked to this site the most."
     top_referred_topics:
       title: "Top Referred Topics"
+      xaxis: ""
       labels:
         num_clicks: "Clicks"
         topic: "Topic"