add back sales app

[martinxu9]

deployed here: https://sales.staging.reflexcorp.run/, will redeploy to prod for the gallery

[masenf]

i think we should make this an on_load

Suggested change

	@rx.var
	def get_users(self) -> list[Customer]:
	"""Get all users from the database."""
	with rx.session() as session:
	return session.exec(select(Customer)).all()
	def get_users(self) -> list[Customer]:
	"""Get all users from the database."""
	with rx.session() as session:
	self.users = session.exec(select(Customer)).all()

Then update add_customer and delete_customer to call this afterwards. And have the / route call it on_load.

This tends to be better for data apps, because it avoids database queries on every action, and allows the app to export without a database defined (which is why the CI is failing)

[masenf]

nice