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R2-H10: webhook-delivery-log and audit-log-list both swallowed fetch errors silently — failed loads showed spinner forever or stale data. Both now set a loadError state, show an inline retry banner, and fire a toast.error. Same applies to audit-log loadMore. R2-H11: audit-log-card rendered as `<a href="#">` — tapping on mobile inserted `#` in the URL and scrolled to top (back-button trap). ListCard now treats `href` as optional and renders a non-link `<div>` when omitted; audit-log-card no longer passes href. R2-H12: smart-archive-dialog only invalidated ['clients'] / ['berths'] / ['interests']. Detail header kept showing Archived=false until hard reload. Now also invalidates ['clients', clientId] and removes the ['client-archive-dossier', clientId] cache so re-open re-fetches. R2-H13: client-list bulk mutation used native alert() on partial failure (blocking the page) and had no onError handler. Replaced with toast.warning / toast.success / toast.error. 1175/1175 vitest passing. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>