refactor: tidy connected bot ownership flow

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

@@ -181,7 +181,7 @@ class Api::V1::Accounts::ConversationsController < Api::V1::Accounts::BaseContro
 
   def handle_human_open
     @conversation.assignee_agent_bot = nil
-    @conversation.assignee = current_user if current_user.agent?
+    @conversation.assignee = Current.user if Current.user.agent?
     @conversation.save!
   end
 

app/models/conversation.rb

@@ -300,10 +300,10 @@ class Conversation < ApplicationRecord
   end
 
   def set_active_bot_conversation
+    # TODO: make this an inbox config instead of assuming bot conversations should start as pending
     self.status = :pending
     return unless inbox.agent_bot_inbox&.active? && assignee_id.blank?
 
-    self.assignee = nil
     self.assignee_agent_bot = inbox.agent_bot
   end