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xarmian
72d8963c4c
Item timelines showed two collab-snapshot problems:
1. Artifacts: the timeline endpoint (ListItemVersionsBeforeTime) served
diff versions unresolved, so TimelineVersionCard fed raw diff-match-patch
patch text into DiffView. Add GET /items/{slug}/versions/{versionID}
(handleGetItemVersion -> Store.GetItemVersionResolved) and have the card
lazily fetch resolved content the first time a diff version is expanded.
2. Clutter: every ~5s web-editor autosave flushes a collab-snapshot version.
buildTimeline now collapses uninterrupted collab-snapshot bursts (within
10 min, no intervening event) to their newest entry, and the source badge
renders as "Autosave" instead of the raw slug.
Adds TestCollapseAutosaveBursts. Known limitation (accepted): collapse is
page-local, so a 150+ cross-actor autosave chain can leak one row per
"Load more" page — gated by the 1h version throttle, degrades gracefully.