Change design of federation pages in admin UI (#17704)

* Change design of federation pages in admin UI

* Fix query performance in instance media attachments measure

* Fix reblogs being included in instance languages dimension

app/lib/admin/metrics/dimension/instance_languages_dimension.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+class Admin::Metrics::Dimension::InstanceLanguagesDimension < Admin::Metrics::Dimension::BaseDimension
+  include LanguagesHelper
+
+  def self.with_params?
+    true
+  end
+
+  def key
+    'instance_languages'
+  end
+
+  protected
+
+  def perform_query
+    sql = <<-SQL.squish
+      SELECT COALESCE(statuses.language, 'und') AS language, count(*) AS value
+      FROM statuses
+      INNER JOIN accounts ON accounts.id = statuses.account_id
+      WHERE accounts.domain = $1
+        AND statuses.id BETWEEN $2 AND $3
+        AND statuses.reblog_of_id IS NULL
+      GROUP BY COALESCE(statuses.language, 'und')
+      ORDER BY count(*) DESC
+      LIMIT $4
+    SQL
+
+    rows = ActiveRecord::Base.connection.select_all(sql, nil, [[nil, params[:domain]], [nil, Mastodon::Snowflake.id_at(@start_at, with_random: false)], [nil, Mastodon::Snowflake.id_at(@end_at, with_random: false)], [nil, @limit]])
+
+    rows.map { |row| { key: row['language'], human_key: standard_locale_name(row['language']), value: row['value'].to_s } }
+  end
+
+  def params
+    @params.permit(:domain)
+  end
+end