Clock should show loading instead of completed by default.

Sometimes when the state of the clock is invalid, it is defaulted to timeLeft=0. This basically just shows the "Completed" state until the clock is updated with correct information. While we'll be putting in a separate effort to improve the reliability of the clock, the clock should also just have a loading state, so we don't falsely report that the competition is completed.

Start by tracing the clock state that defaults invalid data to timeLeft=0 and locate where that value produces the "Completed" display. Verify that invalid or not-yet-updated clock data shows a loading state instead, without falsely reporting completion.

Written by the indexing model from the issue text.