fix(captain): add activity message when resolve tool is used

- Add resolve tool to Captain assistant agent_tools
- Add Current.tool_name to track active tool execution
- Set tool_name in resolve tool before resolving conversation
- Add tool_resolved i18n key for tool-based resolution
- Refactor ActivityMessageHandler for better readability

Fixes issue where conversations resolved via the resolve tool would
silently change status with no timeline/audit entry.

config/locales/en.yml

@@ -214,6 +214,7 @@ en:
     activity:
       captain:
         resolved: 'Conversation was marked resolved by %{user_name} due to inactivity'
+        tool_resolved: 'Conversation was resolved by %{user_name}'
         open: 'Conversation was marked open by %{user_name}'
       agent_bot:
         error_moved_to_open: 'Conversation was marked open by system due to an error with the agent bot.'

enterprise/app/models/enterprise/activity_message_handler.rb

@@ -1,22 +1,21 @@
 module Enterprise::ActivityMessageHandler
   def automation_status_change_activity_content
-    if Current.executed_by.instance_of?(Captain::Assistant)
-      locale = Current.executed_by.account.locale
-      if resolved?
-        I18n.t(
-          'conversations.activity.captain.resolved',
-          user_name: Current.executed_by.name,
-          locale: locale
-        )
-      elsif open?
-        I18n.t(
-          'conversations.activity.captain.open',
-          user_name: Current.executed_by.name,
-          locale: locale
-        )
-      end
-    else
-      super
-    end
+    return super unless Current.executed_by.instance_of?(Captain::Assistant)
+    return unless resolved? || open?
+
+    locale = Current.executed_by.account.locale
+    user_name = Current.executed_by.name
+    key = captain_activity_key
+
+    I18n.t(key, user_name: user_name, locale: locale)
+  end
+
+  private
+
+  def captain_activity_key
+    return 'conversations.activity.captain.open' if open?
+    return 'conversations.activity.captain.tool_resolved' if Current.tool_name == 'resolve'
+
+    'conversations.activity.captain.resolved'
   end
 end

enterprise/lib/captain/tools/resolve_tool.rb

@@ -37,7 +37,10 @@ class Captain::Tools::ResolveTool < Captain::Tools::BasePublicTool
     end
 
     # Mark conversation as resolved
+    Current.tool_name = 'resolve'
     conversation.resolved!
+  ensure
+    Current.tool_name = nil
   end
 
   def permissions

lib/current.rb

@@ -4,6 +4,7 @@ module Current
   thread_mattr_accessor :account_user
   thread_mattr_accessor :executed_by
   thread_mattr_accessor :contact
+  thread_mattr_accessor :tool_name
 
   def self.reset
     Current.user = nil
@@ -11,5 +12,6 @@ module Current
     Current.account_user = nil
     Current.executed_by = nil
     Current.contact = nil
+    Current.tool_name = nil
   end
 end