Register the Esc keydown listener in capture phase (useCapture=true) and
call stopPropagation() so App.vue's document-level handler never fires.
Without this, both handlers ran: App.vue pushed "/" and the component
pushed "/projects/:id", with non-deterministic winner. Also fixes the
blur-then-navigate issue where App.vue blurring an input caused the
component's handler to see body as the active element and navigate
immediately instead of stopping at the blur step.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>