Improve public status page title (#5985)

app/views/stream_entries/show.html.haml

@@ -1,3 +1,6 @@
+- content_for :page_title do
+  = t('statuses.title', name: display_name(@account), quote: truncate(@stream_entry.activity.text, length: 50, omission: '…'))
+
 - content_for :header_tags do
   - if @account.user&.setting_noindex
     %meta{ name: 'robots', content: 'noindex' }/

config/locales/en.yml

@@ -599,6 +599,7 @@ en:
       private: Non-public toot cannot be pinned
       reblog: A boost cannot be pinned
     show_more: Show more
+    title: '%{name}: "%{quote}"'
     visibilities:
       private: Followers-only
       private_long: Only show to followers