Reflect queued and active schedule runs in task status, refresh tasks on queue changes, and prevent duplicate Run Now actions until the current run finishes. Add lifecycle regression coverage and update scheduled task behavior documentation.
This file-level commit also includes concurrent conversation history, browser workbar, and runtime selection changes in the affected files. Focused schedule regressions passed; full workspace validation has unrelated failures as recorded during development.
Release note: Scheduled tasks now refresh their queued and running status and keep Run Now disabled while an occurrence is active.
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