Projektstruktur
admin
	add_or_edit_user
	list_users
profile
	show_own_profile (base)
	edit_own_profile (sub)
cars
	list_cars
car
	add_or_edit_car
	car_details
	add_or_edit_maintenance_info
	perform_maintenance
calendar
	list_upcoming_maintenance
dashboard or /
	show calendar, car_list and stats


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