Third tree-sync finding (#8). On a socket reconnect after a missed-events gap
(laptop sleep / wifi blip), the resync only invalidated the ROOT sidebar query;
a move/rename/delete that happened INSIDE an already-loaded, expanded branch was
never reflected — the branch stayed stale until the user manually interacted.
(The #2 fix reconciles the root level; this covers the deeper loaded branches.)
- `treeModel.reconcileChildren(tree, parentId, fresh)`: replace a loaded
branch's DIRECT children with the authoritative fresh set (drop removed, add
new, reorder to server) while PRESERVING each surviving child's already-loaded
grandchildren, so deeper expansion is not collapsed. An unloaded branch
(children === undefined) is left untouched (lazy-load fetches it fresh).
- `loadedOpenBranchIds(tree, openIds)`: the branches a reconnect should refresh
(open AND loaded). `fetchAllAncestorChildren(..., { fresh: true })` bypasses
the 30-min sidebar cache so the reconcile sees current data (handler-order
independent).
- space-tree: on socket `connect`, re-fetch + reconcile each open loaded branch
of the active space (space-switch-guarded; an unloaded branch is skipped).
Tests: reconcileChildren (drop/add/reorder + preserve grandchildren + unloaded
no-op) and loadedOpenBranchIds (open+loaded only, skip unloaded, nested). The
pure logic is unit-tested; the live socket-reconnect round-trip is not
browser-automated (simulating a reconnect gap is impractical) — sidebar render +
expand were smoke-tested with no regression.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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