Fix missing source strings and inconsistent lead text style in admin UI (#16052)

app/helpers/application_helper.rb

@@ -91,8 +91,6 @@ module ApplicationHelper
       fa_icon('unlock', title: I18n.t('statuses.visibilities.unlisted'))
     elsif status.private_visibility? || status.limited_visibility?
       fa_icon('lock', title: I18n.t('statuses.visibilities.private'))
-    elsif status.direct_visibility?
-      fa_icon('envelope', title: I18n.t('statuses.visibilities.direct'))
     end
   end
 

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

@@ -4,8 +4,7 @@
 - content_for :header_tags do
   = javascript_pack_tag 'admin', async: true, crossorigin: 'anonymous'
 
-.simple_form
-  %p.hint= t('admin.follow_recommendations.description_html')
+%p= t('admin.follow_recommendations.description_html')
 
 %hr.spacer/
 

app/views/admin/rules/index.html.haml

 - content_for :page_title do
   = t('admin.rules.title')
 
-.simple_form
-  %p.hint= t('admin.rules.description')
+%p= t('admin.rules.description_html')
+
+%hr.spacer/
 
 - if can? :create, :rule
   = simple_form_for @rule, url: admin_rules_path do |f|

app/views/user_mailer/webauthn_enabled.text.erb

-<%= t 'devise.mailer.webauthn_credentia.added.title' %>
+<%= t 'devise.mailer.webauthn_credential.added.title' %>
 
 ===
 
-<%= t 'devise.mailer.webauthn_credentia.added.explanation' %>
+<%= t 'devise.mailer.webauthn_credential.added.explanation' %>
 
 => <%= edit_user_registration_url %>

config/locales/en.yml

@@ -315,10 +315,12 @@ en:
       new:
         create: Create announcement
         title: New announcement
+      publish: Publish
       published_msg: Announcement successfully published!
       scheduled_for: Scheduled for %{time}
       scheduled_msg: Announcement scheduled for publication!
       title: Announcements
+      unpublish: Unpublish
       unpublished_msg: Announcement successfully unpublished!
       updated_msg: Announcement successfully updated!
     custom_emojis:
@@ -552,8 +554,10 @@ en:
       updated_at: Updated
     rules:
       add_new: Add rule
-      description: While most claim to have read and agree to the terms of service, usually people do not read through until after a problem arises. Make it easier to see your server's rules at a glance by providing them in a flat bullet point list. Try to keep individual rules short and simple, but try not to split them up into many separate items either.
+      delete: Delete
+      description_html: While most claim to have read and agree to the terms of service, usually people do not read through until after a problem arises. <strong>Make it easier to see your server's rules at a glance by providing them in a flat bullet point list.</strong> Try to keep individual rules short and simple, but try not to split them up into many separate items either.
       edit: Edit rule
+      empty: No server rules have been defined yet.
       title: Server rules
     settings:
       activity_api_enabled:
@@ -695,6 +699,7 @@ en:
       add_new: Add new
       delete: Delete
       edit_preset: Edit warning preset
+      empty: You haven't defined any warning presets yet.
       title: Manage warning presets
   admin_mailer:
     new_pending_account: