Change account deletion page to have better explanations (#11753)

Fix deletion of unconfirmed account not freeing up the username

Add prefill of logged-in user's email in the reconfirmation form

app/controllers/auth/confirmations_controller.rb

@@ -4,15 +4,38 @@ class Auth::ConfirmationsController < Devise::ConfirmationsController
   layout 'auth'
 
   before_action :set_body_classes
+  before_action :require_unconfirmed!
 
   skip_before_action :require_functional!
 
+  def new
+    super
+
+    resource.email = current_user.unconfirmed_email || current_user.email if user_signed_in?
+  end
+
   private
 
+  def require_unconfirmed!
+    redirect_to edit_user_registration_path if user_signed_in? && current_user.confirmed? && current_user.unconfirmed_email.blank?
+  end
+
   def set_body_classes
     @body_classes = 'lighter'
   end
 
+  def after_resending_confirmation_instructions_path_for(_resource_name)
+    if user_signed_in?
+      if user.confirmed? && user.approved?
+        edit_user_registration_path
+      else
+        auth_setup_path
+      end
+    else
+      new_user_session_path
+    end
+  end
+
   def after_confirmation_path_for(_resource_name, user)
     if user.created_by_application && truthy_param?(:redirect_to_app)
       user.created_by_application.redirect_uri