fix: Add a check for 24 hour window before sending a message (#1084)

Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/models/conversation.rb

@@ -58,6 +58,16 @@ class Conversation < ApplicationRecord
 
   acts_as_taggable_on :labels
 
+  def can_reply?
+    return true unless inbox&.channel&.has_24_hour_messaging_window?
+
+    last_incoming_message = messages.incoming.last
+
+    return false if last_incoming_message.nil?
+
+    Time.current < last_incoming_message.created_at + 24.hours
+  end
+
   def update_assignee(agent = nil)
     update!(assignee: agent)
   end