fix: Improve UI and fix username validation issues #128

Job	Run time
Security & Code Quality	1m 15s
Test Suite	1m 0s
Build & Performance	3m 40s
Database Tests	59s
Enhanced Security Testing	4m 22s
Deploy to Staging	0s
Deploy to Production	0s
Rollback on Failure	0s
Performance Monitoring (Staging)	0s
Performance Monitoring	0s
	11m 16s

Provide feedback