BUG-005 — Password confirmation is compared case-insensitively

Priority: Critical
Severity: Blocker
Environment: Chrome 128, desktop
Steps to reproduce:
1. Fill in all form fields with valid data
2. Enter Secret12 in the "Password" field
3. Enter secret12 (same string, lowercase) in "Confirm password"
4. Click "Create account"
Expected result: Error "Passwords do not match" — the strings differ when case is considered
Actual result: The form treats the passwords as matching; registration succeeds
Impact: A user may accidentally set a password that differs from what they intended to type — risk of being unable to log in later