Because:
- Passwordless accounts skip Step 2 (password entry), so the Step 1 "Continue" button deletes the account immediately.
- The blue "Continue" label misled users into expecting another step, creating a data-loss risk.
This commit:
- Branches the Step 1 action button on account.hasPassword; passwordless accounts now see a red cta-caution "Delete account" button.
- Adds FTL string delete-account-delete-button-passwordless.
- Adds unit tests covering label and style for both variants.
- Adds a Playwright functional test that deletes a passwordless account without a password step.
Fixes FXA-13419