The detector re-armed its GuidBaseline on a pointer compare (proj != lastProject),
a weaker signal than persist's GUID-primary identity. On a load onto a recycled
ReaProject* the baseline never reset, so the just-loaded project's pre-existing
tracks diffed against the previous project and were mass-tagged into the active
mode — opening a Design-saved project mis-tagged its Arrange tracks. Re-arm now
rides persist's authoritative load signal via bankPanelNotifyProjectLoaded().
Drives fixed-lane C_LANEPLAYS for managed lanes only (name-keyed, ordinal-renumber
safe) in the view shell; diffs live track/item GUIDs on the panel timer to auto-tag
new content to the active mode, first-poll-guarded. Pure guid_diff + lane_keys
modules unit-tested; folds in Wave-1 polish.
daniel