Fases 7 e 8 — PDFs Prawn + QR + Painel Motorista + Notificações

db/migrate/20260101000009_add_login_token_to_users.rb

@@ -0,0 +1,6 @@
+class AddLoginTokenToUsers < ActiveRecord::Migration[7.1]
+  def change
+    add_column :users, :login_token, :string
+    add_index  :users, :login_token, unique: true
+  end
+end