feat(reports): filter hidden metrics from API responses

Apply MetricFilter concern to reports controllers:
- ReportsController: return empty array for hidden timeseries metrics,
  filter summary and bot_summary responses
- SummaryReportsController: filter hidden metrics from array responses

app/controllers/api/v2/accounts/reports_controller.rb

@@ -1,21 +1,25 @@
 class Api::V2::Accounts::ReportsController < Api::V1::Accounts::BaseController
   include Api::V2::Accounts::ReportsHelper
   include Api::V2::Accounts::HeatmapHelper
+  include Reports::MetricFilter
 
   before_action :check_authorization
 
   def index
+    # Return empty timeseries array for hidden metrics (preserves expected response shape)
+    return render json: [] if metric_hidden?(params[:metric])
+
     builder = V2::Reports::Conversations::ReportBuilder.new(Current.account, report_params)
     data = builder.timeseries
     render json: data
   end
 
   def summary
-    render json: build_summary(:summary)
+    render json: filter_summary_with_previous(build_summary(:summary))
   end
 
   def bot_summary
-    render json: build_summary(:bot_summary)
+    render json: filter_summary_with_previous(build_summary(:bot_summary))
   end
 
   def agents

app/controllers/api/v2/accounts/summary_reports_controller.rb

@@ -1,4 +1,6 @@
 class Api::V2::Accounts::SummaryReportsController < Api::V1::Accounts::BaseController
+  include Reports::MetricFilter
+
   before_action :check_authorization
   before_action :prepare_builder_params, only: [:agent, :team, :inbox, :label, :channel]
 
@@ -40,7 +42,7 @@ class Api::V2::Accounts::SummaryReportsController < Api::V1::Accounts::BaseContr
 
   def render_report_with(builder_class)
     builder = builder_class.new(account: Current.account, params: @builder_params)
-    render json: builder.build
+    render json: filter_hidden_metrics_from_array(builder.build)
   end
 
   def permitted_params