The 4s reconcile tick called Apply(), which did Rows.Clear() + refill on
every tick -- resetting the user's scroll position and selection while
they're mid-read, exactly what the overlay exists to avoid.
Reconcile granularly instead: find the overlap between the previous and
latest snapshot (the ring buffer is append-mostly, evicting from the
front as entries age out of the 30-min window), trim rows for evicted
entries off the tail, and insert new entries at the head. A tick with no
change now leaves Rows untouched. The WarnErrorOnly toggle still goes
through the full Apply() rebuild, unchanged.
Two follow-ups to the Phase 3 reconcile tick:
- LogVisualizer and WorktreesOverview only stopped their timer in the Close
command, but ShowLogVisualizerAsync/ShowWorktreesOverviewAsync had no
dlg.Closed fallback (unlike the MergeHelper picker). An Alt+F4 or owner
close left a 4s timer polling the worker / re-running LoadAsync on an
orphaned VM, accumulating one per open. Extracted StopReconcileTick on both
VMs and wired it from Closed.
- The tick scanned Items linearly per id; at the 500-row cap that is ~250k
string comparisons every few seconds. Index the rows once instead.
TasksIslandViewModel now runs a periodic tick that diffs the flat Items
collection against SQLite and patches properties in place (capped at 500
rows, sharing the Phase 1 delta sequence guard so it never overtakes a
fresher broadcast). Never rebuilds rows or triggers Regroup/LoadForList, so
it stays decoupled from the parallel Phase 2b virtualization work. The same
cadence now refreshes the long-lived Worktrees Overview, Log Visualizer, and
Merge Helper selection overlays; short-lived modals are untouched.
Reverses row order in LogVisualizerViewModel.Apply() so the most recent
entry sits at index 0, matching the "what just happened" use case;
filtering and refresh are unaffected since the reversal happens after
the warn/error filter is applied.
mika kuns