Add moderation warnings (#9519)

* Add moderation warnings

Replace individual routes for disabling, silencing, and suspending
a user, as well as the report update route, with a unified account
action controller that allows you to select an action (none,
disable, silence, suspend) as well as whether it should generate an
e-mail notification with optional custom text. That notification,
with the optional custom text, is saved as a warning.

Additionally, there are warning presets you can configure to save
time when performing the above.

* Use Account#local_username_and_domain

app/controllers/admin/accounts_controller.rb

@@ -2,9 +2,9 @@
 
 module Admin
   class AccountsController < BaseController
-    before_action :set_account, only: [:show, :subscribe, :unsubscribe, :redownload, :remove_avatar, :remove_header, :enable, :disable, :memorialize]
+    before_action :set_account, only: [:show, :subscribe, :unsubscribe, :redownload, :remove_avatar, :remove_header, :enable, :memorialize]
     before_action :require_remote_account!, only: [:subscribe, :unsubscribe, :redownload]
-    before_action :require_local_account!, only: [:enable, :disable, :memorialize]
+    before_action :require_local_account!, only: [:enable, :memorialize]
 
     def index
       authorize :account, :index?
@@ -13,8 +13,10 @@ module Admin
 
     def show
       authorize @account, :show?
+
       @account_moderation_note = current_account.account_moderation_notes.new(target_account: @account)
-      @moderation_notes = @account.targeted_moderation_notes.latest
+      @moderation_notes        = @account.targeted_moderation_notes.latest
+      @warnings                = @account.targeted_account_warnings.latest.custom
     end
 
     def subscribe
@@ -43,10 +45,17 @@ module Admin
       redirect_to admin_account_path(@account.id)
     end
 
-    def disable
-      authorize @account.user, :disable?
-      @account.user.disable!
-      log_action :disable, @account.user
+    def unsilence
+      authorize @account, :unsilence?
+      @account.unsilence!
+      log_action :unsilence, @account
+      redirect_to admin_account_path(@account.id)
+    end
+
+    def unsuspend
+      authorize @account, :unsuspend?
+      @account.unsuspend!
+      log_action :unsuspend, @account
       redirect_to admin_account_path(@account.id)
     end