feat: UI to show the SLA threshold in chat screen (#9146)

- UI will show the breach in the conversation list.
- UI will show the breach in the conversation header.

Fixes: https://linear.app/chatwoot/issue/CW-3146/update-the-ui-to-show-the-breach-in-the-conversation-list
Fixes: https://linear.app/chatwoot/issue/CW-3144/ui-update-to-show-the-breachgoing-to-breach

enterprise/app/models/applied_sla.rb

@@ -41,6 +41,8 @@ class AppliedSla < ApplicationRecord
                                       }
   scope :missed, -> { where(sla_status: :missed) }
 
+  after_update_commit :push_conversation_event
+
   def push_event_data
     {
       id: id,
@@ -59,6 +61,16 @@ class AppliedSla < ApplicationRecord
 
   private
 
+  def push_conversation_event
+    # right now we simply use `CONVERSATION_UPDATED` event to notify the frontend
+    # we can eventually start using `CONVERSATION_SLA_UPDATED` event as required later
+    # for now the updated event should suffice
+
+    return unless saved_change_to_sla_status?
+
+    conversation.dispatch_conversation_updated_event
+  end
+
   def ensure_account_id
     self.account_id ||= sla_policy&.account_id
   end

enterprise/app/models/enterprise/conversation.rb

@@ -0,0 +1,5 @@
+module Enterprise::Conversation
+  def list_of_keys
+    super + %w[sla_policy_id]
+  end
+end

enterprise/app/presenters/enterprise/conversations/event_data_presenter.rb

@@ -3,7 +3,8 @@ module Enterprise::Conversations::EventDataPresenter
     if account.feature_enabled?('sla')
       super.merge(
         applied_sla: applied_sla&.push_event_data,
-        sla_events: sla_events.map(&:push_event_data)
+        sla_events: sla_events.map(&:push_event_data),
+        sla_policy_id: sla_policy_id
       )
     else
       super