feat: Add user purchase and receipt management

- Implemented 'Mis Compras' and 'Mis Recibos' pages for users to view their orders and payment receipts.
- Enhanced address validation in 'editar_direccion.html' to ensure cities and postal codes belong to Almería.
- Added shipping address display in seller order details on 'pedidos_vendedor.html'.
- Updated user portal to include links to purchases and receipts.
- Introduced email verification functionality during user registration.
- Refactored email sending utility for better error handling and logging.
- Improved session management for checkout processes with selected shipping addresses.

tienda/vars.py

@@ -1,2 +1,42 @@
 PAGE_SIZE = 20
-VAT_RATE = 0.21  # IVA 21%
+VAT_RATE = 0.21  # IVA 21%
+
+# Restricciones de envío
+SHIPPING_COUNTRY = "España"
+ALMERIA_POSTAL_CODE_PREFIX = "04"
+ALMERIA_MUNICIPALITIES_DISPLAY = (
+	"Abla", "Abrucena", "Adra", "Albánchez", "Alboloduy", "Albox", "Alcolea", "Alcóntar",
+	"Alcudia de Monteagud", "Alhabia", "Alhama de Almería", "Alicún", "Almería", "Almócita",
+	"Alsodux", "Antas", "Arboleas", "Armuña de Almanzora", "Bacares", "Bayárcal", "Bayarque",
+	"Bédar", "Beires", "Benahadux", "Benitagla", "Benizalón", "Bentarique", "Berja", "Canjáyar",
+	"Cantoria", "Carboneras", "Castro de Filabres", "Chercos", "Chirivel", "Cóbdar",
+	"Cuevas del Almanzora", "Dalías", "Enix", "Félix", "Fines", "Fiñana", "Fondón", "Gádor",
+	"Gallardos", "Los Gallardos", "Garrucha", "Gérgal", "Huécija", "Huércal de Almería",
+	"Huércal-Overa", "Íllar", "Instinción", "Laroya", "Laujar de Andarax", "Líjar", "Lubrín",
+	"Lucainena de las Torres", "Lúcar", "Macael", "María", "Mojácar", "Mojonera", "La Mojonera",
+	"Nacimiento", "Níjar", "Ohanes", "Olula de Castro", "Olula del Río", "Oria", "Padules",
+	"Partaloa", "Paterna del Río", "Pechina", "Pulpí", "Purchena", "Rágol", "Rioja",
+	"Roquetas de Mar", "Santa Cruz de Marchena", "Santa Fe de Mondújar", "Senés", "Serón", "Sierro",
+	"Somontín", "Sorbas", "Suflí", "Tabernas", "Taberno", "Tahal", "Terque", "Tíjola", "Turre",
+	"Turrillas", "Uleila del Campo", "Urrácal", "Velefique", "Vélez-Blanco", "Vélez-Rubio", "Vera",
+	"Viator", "Vícar", "Zurgena"
+)
+
+verify_message = """
+¡Buenas {name}!
+
+Muchas gracias por registrarte en Comercialmeria, para verificar que el correo que ha empleado es el suyo, por favor, haga click en el siguiente enlace.
+
+Si por alguna razón no es su correo, eliminelo inmediatamente y no le de click al enlace.
+
+{protocol}://{domain}/tienda/verify/{code}
+
+Este email ha sido automatizado
+"""
+
+login_message = """
+¡Buenas {name}!
+
+Le enviamos este correo para indicarle que se acaba de iniciar sesión en un nuevo dispositivo.
+En caso de que no sea usted, para proteger compras indebidas, ¡cambie la contraseña inmediatamente! 
+"""