Issue: Add Unit Tests for LoginWindow Component

[NahomAlemu]

Description

The LoginWindow.tsx handles user authentication including JWT parsing, credential validation, and role-based routing. No test coverage exists. Critical for security.

Tasks

Tasks:

• Test form state management (email/password)
• Test JWT token parsing from response
• Test role-based navigation (admin/creator/user)
• Test error handling for invalid credentials
• Test localStorage token persistence

Visual Aids

[NahomAlemu]

Closing this as my practicum has concluded and the associated PR has been withdrawn. The branch remains available for reference.