Download event times showed raw UTC wall-clock (iso.slice). Added
formatDateTime()/formatLocalDate() (local tz, robust to naive vs tz-aware
ISO) and applied them to the download row + detail modal datetimes and the
credential/artist date displays. formatPostDate stays UTC (date-only,
locale-stable, unit-tested).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Operator-flagged 2026-05-28: the download event detail modal had no way
to copy the error / stdout / stderr text for researching a failure
(parity with the ErrorDetailModal Copy button shipped in v26.05.26.0).
Added per-block Copy buttons (Error, Errors & warnings, Raw stdout, Raw
stderr — the stdout/stderr ones sit in the expansion-panel title with
@click.stop so they don't toggle the panel) plus a "Copy all
diagnostics" button in the footer that assembles a single block: header
line (event id / platform / artist / status / timestamps) + error +
errors&warnings + full stdout + stderr, ready to paste into an issue.
All routed through utils/clipboard.js copyText() — the navigator.clipboard
→ execCommand fallback that works on the plain-HTTP homelab origin
(per feedback_no_secure_context_apis). Each copy shows a confirmation
toast.