FIX: do not show threads with no replies (#26033)

Prior to this fix if a user had started to reply to a message without actually sending a message, the thread would still be created and we would end up listing it in the threads list of a channel.

This commit also improves adds thread and thread_replies_count to the 4th parameter of the chat_message_created event.

plugins/chat/spec/services/chat/create_message_spec.rb

@@ -101,7 +101,7 @@ RSpec.describe Chat::CreateMessage do
           instance_of(Chat::Message),
           channel,
           user,
-          anything,
+          has_entries(thread: anything, thread_replies_count: anything, context: anything),
         )
 
         result
@@ -117,7 +117,14 @@ RSpec.describe Chat::CreateMessage do
             instance_of(Chat::Message),
             channel,
             user,
-            { context: { post_ids: context_post_ids, topic_id: context_topic_id } },
+            has_entries(
+              thread: anything,
+              thread_replies_count: anything,
+              context: {
+                post_ids: context_post_ids,
+                topic_id: context_topic_id,
+              },
+            ),
           )
 
           result

plugins/chat/spec/system/thread_list/full_page_spec.rb

@@ -61,6 +61,15 @@ describe "Thread list in side panel | full page", type: :system do
     end
   end
 
+  it "doesn’t list threads with no replies" do
+    thread = Fabricate(:chat_thread, channel: channel, use_service: true)
+
+    chat_page.visit_channel(channel)
+    channel_page.open_thread_list
+
+    expect(thread_list_page).to have_no_thread(thread)
+  end
+
   context "when there are threads that the user is participating in" do
     fab!(:thread_1) do
       chat_thread_chain_bootstrap(channel: channel, users: [current_user, other_user])