Why: TaskSidebar builds its own workspace entry list without the cockpit
flag, so the 文档驾驶舱 entry never appeared in the sidebar even when the
command probe passed (caught by I4 e2e scenario 1).
Evidence: tsc/vitest/vite build green (SELF); cockpit e2e suite re-run via
Dev scripts/e2e.sh follows on the Dev I4 card.
Impact: sidebar entry visibility only; no behavior change elsewhere.
Refs: rollout I4