fix: Improve UI and fix username validation issues #129

Job	Run time
Security & Code Quality	1m 23s
Test Suite	57s
Database Tests	1m 15s
Build & Performance	3m 36s
Enhanced Security Testing	4m 15s
Deploy to Production	0s
Rollback on Failure	0s
Deploy to Staging	0s
Performance Monitoring	0s
Performance Monitoring (Staging)	0s
	11m 26s

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