Bulk Task Reassignment for Deactivated Users to Active Users

[#1]

Description
We need a way to reassign all open and completed tasks from a deactivated user to an active user in bulk.

Why This Feature Is Important
When an employee leaves the company, there is currently no method to transfer their tasks directly from their profile. This creates administrative overhead and risks losing visibility on critical tasks that may still require action or tracking.

Proposed Functionality
Upon deactivating a user, the system should prompt the administrator to select an active user to whom all open and completed tasks will be reassigned. This should occur automatically as part of the deactivation process, minimizing manual intervention and ensuring continuity of work.

Current Behavior
There is no built-in functionality to support bulk reassignment of tasks from a deactivated user.