feat: Enable Capacity Config UI (#5164)

- Enables Capacity Config in UI
- Rewrite auto assignment Logic to consider only online agents

fixes: #4990

app/models/concerns/assignment_handler.rb

@@ -23,8 +23,8 @@ module AssignmentHandler
   def find_assignee_from_team
     return if team&.allow_auto_assign.blank?
 
-    team_members = inbox.members.ids & team.members.ids
-    ::RoundRobin::AssignmentService.new(conversation: self, allowed_member_ids: team_members).find_assignee
+    team_members_with_capacity = inbox.member_ids_with_assignment_capacity & team.members.ids
+    ::AutoAssignment::AgentAssignmentService.new(conversation: self, allowed_agent_ids: team_members_with_capacity).find_assignee
   end
 
   def notify_assignment_change

app/models/concerns/auto_assignment_handler.rb

@@ -1,23 +1,23 @@
-module RoundRobinHandler
+module AutoAssignmentHandler
   extend ActiveSupport::Concern
   include Events::Types
 
   included do
-    after_save :run_round_robin
+    after_save :run_auto_assignment
   end
 
   private
 
-  def run_round_robin
+  def run_auto_assignment
     # Round robin kicks in on conversation create & update
     # run it only when conversation status changes to open
     return unless conversation_status_changed_to_open?
-    return unless should_round_robin?
+    return unless should_run_auto_assignment?
 
-    ::RoundRobin::AssignmentService.new(conversation: self, allowed_member_ids: inbox.member_ids_with_assignment_capacity).perform
+    ::AutoAssignment::AgentAssignmentService.new(conversation: self, allowed_agent_ids: inbox.member_ids_with_assignment_capacity).perform
   end
 
-  def should_round_robin?
+  def should_run_auto_assignment?
     return false unless inbox.enable_auto_assignment?
 
     # run only if assignee is blank or doesn't have access to inbox