Migrates the three remaining bare confirm() sites from issue #1038 to the
imperative useDestructiveConfirm() pattern already mounted on both pages:
resume-autosend and run-now on the recurring-invoices page, and unapprove
on the salary-run page (its dynamically assembled multi-line copy now
renders as paragraphs via whitespace-pre-line on DialogDescription).
Also adds a togglingId in-flight guard to togglePause, mirroring the
deletingId/runningId guards from PR #1036, so the pause/resume button
cannot fire a duplicate PATCH while one is pending.
Fixes#1038
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
