Fix wrong percentages in admin UI for hashtag usage breakdown (mastodon#11714)

Author: Gargron

app/controllers/admin/tags_controller.rb

@@ -37,7 +37,8 @@ def set_tag
 
     def set_usage_by_domain
       @usage_by_domain = @tag.statuses
-                             .where(visibility: :public)
+                             .with_public_visibility
+                             .excluding_silenced_accounts
                              .where(Status.arel_table[:id].gteq(Mastodon::Snowflake.id_at(Time.now.utc.beginning_of_day)))
                              .joins(:account)
                              .group('accounts.domain')

app/views/admin/tags/show.html.haml

@@ -38,8 +38,10 @@
 .table-wrapper
   %table.table
     %tbody
+      - total = @usage_by_domain.sum(&:statuses_count).to_f
+
       - @usage_by_domain.each do |(domain, count)|
         %tr
           %th= domain || site_hostname
-          %td= number_to_percentage((count / @tag.history[0][:uses].to_f) * 100)
+          %td= number_to_percentage((count / total) * 100, precision: 1)
           %td= number_with_delimiter count