With no type-to-search active, Backspace goes to the parent directory. Never
on a repeat, so holding it doesn't climb to the root. Not every platform
flags repeats, so the browser also tracks whether it's held.
Windows raw input now flags auto-repeated key downs as IS_REPEAT, like
Android and UWP, and forgets the held keys it releases on losing focus. The
UI drops OS repeats of a key it's already repeating itself, so held arrows
don't double up (they were dropped before too, a step later).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
