Codex (CORE regression): the parallelized loadDir('.') started BEFORE the
_switchGen stale-switch guard; empty-session switches reuse the session id, so a
superseded switch's /api/list could paint the wrong profile's tree. Reverted to
guard-before-workspace-render ordering (the up-front skeletons already give the
immediate cross-surface feedback; the parallel gain was marginal).
Opus findings:
- [blocker] Workspace skeleton stranded permanently when the new profile has no
bound workspace (loadDir skipped → nothing clears #fileTree). Added
clearWorkspaceTreeSkeleton() (only empties when a skeleton is present) and call
it on the no-workspace path in BOTH switch branches.
- [low-med] Session-list skeleton stranded if an inline-rename input or row
action menu was open (renderSessionListFromCache early-returns before the DOM
swap). Dismiss _renamingSid + closeSessionActionMenu() before showing the
skeleton.
- [low] No-op self-switch flashed skeleton→restore (activateCurrentProfile
doesn't pre-check). Added an early-return when name === S.activeProfile.
Tests: +4 static assertions for the self-switch guard, rename/menu dismissal,
no-workspace skeleton clear, and the clear-helper definition. 22 pass.