Visual Previews for Sleep Session Selection

The sleep session selection screen previously relied on text-only listings of titles and descriptions. This required users to read through options before making a choice — introducing unnecessary cognitive load at the point of sleep onset.

The data model was updated to include a preview image field for each sleep session, and the delivery pipeline was adjusted to surface those images alongside each option. Visual context now carries through the full routine from initial selection to alarm configuration and session persistence.

Loading performance was a key consideration: data pre-fetching and caching were prioritized to ensure image display does not delay screen readiness. The result is a selection experience that communicates session character at a glance, reducing friction at the final step before sleep.