Define username format and validation rules

Users have requested clearer structure and validation for usernames to ensure consistency across the platform.

Usernames should follow a defined format, such as:

• No spaces

• Allowed characters limited to letters, numbers, underscores, or hashtags (if applicable)

• Consistent styling for tagging and mentions

Establishing these rules will improve user searchability, tagging functionality, and overall platform organization, while preventing duplicate or conflicting formats.

We are reviewing username validation standards to create a clean and consistent identity system across Adrenaline Realm.