Allow Users to Set Their Own Timezone in Profile Settings

As a user, I would like the ability to manually set my timezone in my user profile settings. This would ensure that all dates and times displayed throughout the app (such as tasks, events, and notifications) are shown in my preferred timezone, regardless of my device or browser settings. Why this is important: Users may travel or work remotely from different locations and need consistent time references. Relying solely on browser or device timezone can lead to confusion, especially for distributed teams. Having a user-defined timezone would improve clarity for scheduling, deadlines, and collaboration. Proposed Solution: Add a timezone selector to the user profile settings page. Use the selected timezone as the default for all date/time displays and calculations in the app. Optionally, allow users to override or update their timezone as needed. Impact: This feature would help prevent miscommunication and errors related to time differences, making the platform more user-friendly for global teams.