feat: Display reply time in widget (#1349)

Fixes #1132

app/controllers/api/v1/accounts/inboxes_controller.rb

@@ -79,7 +79,7 @@ class Api::V1::Accounts::InboxesController < Api::V1::Accounts::BaseController
 
   def permitted_params
     params.permit(:id, :avatar, :name, :greeting_message, :greeting_enabled, channel:
-      [:type, :website_url, :widget_color, :welcome_title, :welcome_tagline, :webhook_url, :email])
+      [:type, :website_url, :widget_color, :welcome_title, :welcome_tagline, :webhook_url, :email, :reply_time])
   end
 
   def inbox_update_params
@@ -91,6 +91,7 @@ class Api::V1::Accounts::InboxesController < Api::V1::Accounts::BaseController
                     :welcome_tagline,
                     :webhook_url,
                     :email,
+                    :reply_time,
                     { selected_feature_flags: [] }
                   ])
   end

app/controllers/api/v1/widget/base_controller.rb

@@ -4,10 +4,12 @@ class Api::V1::Widget::BaseController < ApplicationController
 
   private
 
+  def conversations
+    @conversations = @contact_inbox.conversations.where(inbox_id: auth_token_params[:inbox_id])
+  end
+
   def conversation
-    @conversation ||= @contact_inbox.conversations.where(
-      inbox_id: auth_token_params[:inbox_id]
-    ).last
+    @conversation ||= conversations.last
   end
 
   def auth_token_params