* Update module version to 18.0.1.0.0
* Remove view modifications as they are handled by parent modules
* Add comprehensive test suite (34 tests):
- Test triple discount mixin write() method behavior
- Test account.move.line with triple discounts
- Test purchase.order.line with triple discounts
* Add oca_dependencies.txt with required OCA repositories
* Fix write() method to handle explicit discounts correctly
