0.2.0 — zen view

Adds the zen view: a dedicated tab where each tracked task is its own progress bar, the running task is outlined, and the day's total ticks on top next to a single start/pause control.

Open it from the ribbon (timer icon) or the command Open zen view. It follows the last markdown note you visited, so opening a daily note puts that day in front of you. Clicking a row switches the timer to it, under the same single-timer rule as the editor buttons.