Elapsed Intervention Time Display to Mitigate Sunk Cost Bias

Summary: Display cumulative elapsed time during interventions to encourage a "cut-the-losses" mindset.

Problem: Users experience the sunk cost fallacy while waiting through long intervention screens, feeling that time already spent justifies waiting until the end rather than abandoning the app open entirely.

Proposed Solution: Add a live timer indicating how much time has already been spent inside the active intervention screen. Framing the metric as time lost/spent encourages a stop-loss mindset, prompting the user to cut their losses and exit earlier.