[FEATURE] Session-local CronCreate tasks should be visible in the Routines UI

Currently, tasks scheduled via CronCreate are only discoverable by running CronList within the active session. They have no representation in the Routines panel in the Claude Code sidebar.

Request: Surface session-local scheduled tasks (created via CronCreate) in the Routines UI alongside cloud Routines, with the ability to view, cancel, and ideally promote them to persistent cloud Routines from the same panel.

Why: Users setting up recurring workflows (e.g. daily ticket triage via a skill) have no way to audit or manage their scheduled tasks without staying in the originating session and remembering job IDs. A unified Routines view would make this discoverable and manageable.