Profile Name Set with Only Special Characters Causes Blank Display

[jonneychris]

Issue Description:
Users are able to set a nickname or secret group name using only special characters. After setting it, the profile appears blank in the UI.

Steps to Reproduce:
1.Go to profile settings and set a nickname using only special characters (e.g., @#$%^&*).
2.Save the changes.
3.Observe the profile display.
4.Repeat the same steps while creating or editing a secret group name using only special characters.

Expected Result:
The app should prevent users from setting a name with only special characters.

Actual Result:
The profile name appears blank after setting only special characters.