Logic-Based Guest Portal Interface & Expanded Upsell Capabilities

The user is requesting a more customizable and user-friendly interface for the Guest Portal that operates on logic-based rules. A primary use case is the ability to upsell additional nights directly through the portal, which would automatically update the reservation dates in Hospitable without requiring manual intervention from the host. This would expand the current upsell accessibility beyond just time-of-day adjustments (like late check-out) to include full-day extensions.