[Admin/Team#834][Functional] Verify if the field has invalid characters, the system highlights the field in red and displays an error message under the field.

[nastya0410]

Priority: high

Preconditions

1. The user is logged in as an admin.
2. The 'Команда' page in the left menu is opened.
3. The modal window for creating new team member is opened.

Steps to reproduce

1. Type invalid characters in the Name field (e.g., “M@rk#!”).
2. Observe the field and form behavior.

Expected results

1. Field turns red after the 41st character.
2. Error message: 🇺🇦 "Дозволені лише літери, пробіли, дефіси (-) та апострофи (')" / en "Only letters, spaces, hyphens (-), and apostrophes (') are allowed"

User story: #834

Related bug: