Sales Timesheet: exclude Task from Sale Order

This module adds a single checkbox, "Exclude from Sale Order", on the task form, placed just before the existing Sale Order Item field. It is meant for teams that bill timesheets by employee and need certain tasks to stay out of the Sale Order.

When you tick the checkbox on a task, the task is treated as not linked to any Sale Order: the computed Sale Order shown on the task is cleared. The change is applied automatically whenever the checkbox is saved, so you do not need to run anything manually.

Saving the checkbox also refreshes the timesheet entries already logged on that task, but only those that have not yet been invoiced. This means timesheets that are still open get re-evaluated against the new setting, while already invoiced lines are left untouched.

• Where it appears: on the task form, next to the Sale Order Item field.
• What it affects: the task itself and its timesheet entries.
• Business rule: excluded tasks show no Sale Order, and their not-yet-invoiced timesheets are recalculated.
• Limitation: timesheets that are already invoiced are not changed.

The module extends the project.task model and depends on sale_timesheet and sale_project.