Compensate for scrollbar disappearing when media modal visible (#8100)

* Compensate for scrollbar disappearing when media modal visible

Make auth pages backgrounds lighter

* Fix typo

app/controllers/auth/confirmations_controller.rb

@@ -3,6 +3,7 @@
 class Auth::ConfirmationsController < Devise::ConfirmationsController
   layout 'auth'
 
+  before_action :set_body_classes
   before_action :set_user, only: [:finish_signup]
 
   # GET/PATCH /users/:id/finish_signup
@@ -23,6 +24,10 @@ class Auth::ConfirmationsController < Devise::ConfirmationsController
     @user = current_user
   end
 
+  def set_body_classes
+    @body_classes = 'lighter'
+  end
+
   def user_params
     params.require(:user).permit(:email)
   end

app/controllers/auth/passwords_controller.rb

@@ -2,6 +2,7 @@
 
 class Auth::PasswordsController < Devise::PasswordsController
   before_action :check_validity_of_reset_password_token, only: :edit
+  before_action :set_body_classes
 
   layout 'auth'
 
@@ -14,6 +15,10 @@ class Auth::PasswordsController < Devise::PasswordsController
     end
   end
 
+  def set_body_classes
+    @body_classes = 'lighter'
+  end
+
   def reset_password_token_is_valid?
     resource_class.with_reset_password_token(params[:reset_password_token]).present?
   end

app/controllers/auth/registrations_controller.rb

@@ -8,6 +8,7 @@ class Auth::RegistrationsController < Devise::RegistrationsController
   before_action :configure_sign_up_params, only: [:create]
   before_action :set_sessions, only: [:edit, :update]
   before_action :set_instance_presenter, only: [:new, :create, :update]
+  before_action :set_body_classes, only: [:new, :create]
 
   def destroy
     not_found
@@ -79,6 +80,10 @@ class Auth::RegistrationsController < Devise::RegistrationsController
     @instance_presenter = InstancePresenter.new
   end
 
+  def set_body_classes
+    @body_classes = 'lighter'
+  end
+
   def set_invite
     @invite = invite_code.present? ? Invite.find_by(code: invite_code) : nil
   end

app/controllers/auth/sessions_controller.rb

@@ -9,6 +9,7 @@ class Auth::SessionsController < Devise::SessionsController
   skip_before_action :check_suspension, only: [:destroy]
   prepend_before_action :authenticate_with_two_factor, if: :two_factor_enabled?, only: [:create]
   before_action :set_instance_presenter, only: [:new]
+  before_action :set_body_classes
 
   def new
     Devise.omniauth_configs.each do |provider, config|
@@ -109,6 +110,10 @@ class Auth::SessionsController < Devise::SessionsController
     @instance_presenter = InstancePresenter.new
   end
 
+  def set_body_classes
+    @body_classes = 'lighter'
+  end
+
   def home_paths(resource)
     paths = [about_path]
     if single_user_mode? && resource.is_a?(User)