Ancestor groups of the active target now show a hollow bolt beside the
existing filled bolt on the target itself, in the servers tree, the
favorites table and the home target browser; the node detail subtitle
shows "含活动目标". The derivation lives in
CatalogTreeSnapshot.ancestors(of:) so every surface shares one rule
while activeTargetID stays a runtime fact outside the catalog
projection. Groups activated directly keep the filled bolt and leave
their member rows unmarked.
Each activation leaf was validated and then derived, resolving keychain
secrets and plugin facts twice and folding derivation failures back into
skips. Prepare once and hand the resolved facts to document assembly so
the catalog tree and activation share one judgment set without a dead
fold-back path.
CatalogEntry gains createdAt/updatedAt and the catalog document moves to
v5 (reads v1-v5, writes v5). Modification time is structure-sensitive:
editing a node's own fields bumps the node, a group's direct child set
or order changes bump the group, and a moved node keeps its timestamps.
No-op writes and unchanged subscription refreshes bump nothing; the
refresh rebuild compares per node, so surviving leaves keep theirs. All
times are passed in by callers as now: Date - one moment per logical
commit, the domain layer stays clock-free. Legacy documents load with
nil (unknown, never backfilled); duplicates and imports stamp fresh
times at the moment of the operation.
Semantics are recorded as glossary term 节点时间戳 and ADR 0031. No UI
in this change.