CRITICAL SECURITY FIX:
- Remove display of default admin username and password from login.ctml
- Login page no longer advertises 'admin' / 'asteroid123' credentials
This was the security issue Fade mentioned during b612 deployment:
'the templates with the default passwords for sure need changing'
Addresses TODO item:
- Problem 4: Templates advertising default admin password ✅ FIXED
Ref: TODO.org line 29-30