Create scopes for filtering comment by user or system

app/models/ai/list_comments_tool/filter.rb

@@ -31,9 +31,9 @@ class Ai::ListCommentsTool::Filter < Ai::Tool::Filter
 
     def apply_type_filter(scope)
       if filters[:type].casecmp?("system")
-        scope.where(creator: { role: "system" })
+        scope.by_system
       else
-      scope.where.not(creator: { role: "system" })
+        scope.by_user
       end
     end
 end

app/models/comment.rb

@@ -9,6 +9,8 @@ class Comment < ApplicationRecord
   searchable_by :body, using: :comments_search_index
 
   scope :chronologically, -> { order created_at: :asc, id: :desc }
+  scope :by_system, -> { joins(:creator).where(creator: { role: "system" }) }
+  scope :by_user, -> { joins(:creator).where.not(creator: { role: "system" }) }
 
   after_create_commit :watch_card_by_creator