User login to access personal tasks

As a registered user, I want to log in to the system So that I can access and manage my personal tasks.

Acceptance Criteria:

• The system verifies the user’s credentials.
• Successful login redirects to the task dashboard.
• Invalid credentials show an error message.
• User remains logged in during the session.

Definition of Done:

• Code reviewed and merged to main branch
• Unit tests cover at least 80% of the module
• Login tested manually with valid and invalid credentials
• Documentation updated (README or Wiki)
• Feature deployed to test environment