The OpenCode server cascade-deletes all child sessions when a parent
is removed. The client was sending individual DELETE requests for each
descendant, which returned 404 after the parent's cascade removed them.
The 404 triggered rollback in deleteSessionAction, restoring already-
deleted sessions back into the global store.
Changes:
- executeDeleteSession: only send the root session delete; the server
cascade handles descendants.
- deleteSession / deleteSessionInDirectory: treat 404 in catch as
success, acting as a safety net for remaining paths (e.g. sidebar
bulk action bar when parent and child are both selected).
Tom
a0597b1065