The input field had two Enter handlers running in parallel: the inline
onkeydown calling checkDomain(), and an addEventListener calling
addEntry('bypass'). preventDefault() in the inline handler does not
cancel the second listener. Result: pressing Enter both checked the
domain AND added it to the bypass list, clearing the input before the
user could see the check results.

Drop the addEventListener block — Enter now only triggers checkDomain().
Adding to bypass/direct/geo remains via the explicit buttons.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>