The success path of handleConfirm() never reset the isSubmitting flag,
so hide()'s early-return guard (line 209: 'if (isSubmitting) return')
kept the modal visible after a successful delete — leaving the user
looking at a stuck 'Deleting...' dialog while the card had already been
removed by the WebSocket SERIES_DELETED event.
Reset isSubmitting and the confirm button text before calling hide(),
and capture currentKey into a local before hide() nulls it so the
follow-up removeSeries() call receives the right key.
Lukas
ff526e08ea