Manages the personal backlog on Todoist and scheduling on Google Calendar. Use it when the user talks about things to do, commitments, study, work, workouts, errands, trips, or deadlines, or asks to organize a day or a period, or to check how full the calendar is. Reads the deduplicated union of open tasks from the Todoist "Inbox" and "Today" views; if the user lists new things, asks for confirmation before adding them to "Inbox" (or to "Today" if explicitly stated for today); writes to Google Calendar only after explicit confirmation of a preview, and completes Todoist tasks only after the write succeeds.
