Refresh exact frontend lanes and relocated host contracts while preserving
Desktop settings behavior. Recognize first-party Switch nodes and optional
branches without suppressing required-input or broken-link diagnostics.
Revalidate canvas, workflow and target identity across focus navigation;
cancel stale requests on newer actions and sidebar teardown. Keep legacy
positioning and nested graph traversal covered by action-level regressions.
Validation: 75 source contracts, 84 frontend unit tests, Windows full gate
with 871 backend tests and 125 subtests, and 149 mocked browser E2E tests.
Seven existing backend skips remain. No live-host certification is claimed.
Pass the concrete tab pane through activation hooks and release late async renders after manager destruction. Keep Chat island activation, unmount, and vanilla status updates bound to their owning container.
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