[Admin/Partners][Functionality] Verify that admin can access the Partners section in the admin panel

[OrigamiUnit]

Priority: High

Preconditions

1. The admin user has valid login credentials.
2. The mockup for the "Партнери" section is available.

Steps to reproduce

1. Go to https://historycode.online/admin-panel.
2. Log in using valid admin credentials.
3. Click on the "Партнери" tab in the navigation menu.

Expected result

• The admin panel page loads without errors.
• The "Партнери" section opens successfully.
• The page layout matches the mockup.

Postconditions:

User story: #1491

Related bug: