The atlas snapshotted the evidence graph at open and re-read it from
storage on ^R. In practice that reload earned nothing — the graph is a
reading of already-stored evidence, and reopening the screen picks up
anything new — so remove the feature: the `retry` handler, the
`_do_rebuild` helper, the `rebuild` constructor argument, and the now
single-use `build()` closure in `open_atlas`. The global ^R binding stays
(Chat still uses it to retry a failed message).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 4.8
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