Previously retry silently created a new task, left the failed one in place with
no link, and didn't take you to the retry. Now:
- The new task is linked to the failed one via `retryOf`; the server stamps the
original `retriedBy` and KEEPS it (its log is the failure record — never
deleted), so history survives and there's no confusing bare duplicate.
- The failed row shows a muted "↻ Retried" pill, hides its now-stale Retry
button, and offers "View retry" to jump to the new run. The new run shows a
"Retry of:" backlink to the original.
- After retrying, the UI selects the new task and opens its live log so you
follow the retry instead of hunting for it.
retryOf rides through the existing POST /api/tasks (no new endpoint); createTask
gained an optional extra-body arg.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>