**Enhancement:**
- Wrap login form in HTML <form> element with @onsubmit
- HTML form automatically treats Enter key as submit action
- No need for custom @onkeypress handler
**Behavior:**
- Users can now press Enter in password field to login
- Or click the login button (existing behavior maintained)
- Both methods trigger HandleLogin() async handler
This provides better UX for keyboard-first users.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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