Add current_period_end to refund eligibility checks and display next billing
date and billing interval in the subscription overview. Refactor the plan
overview layout to show subscription status more prominently.
Centralize min/max server limits in Stripe quantity updates and wire them into
Livewire subscription actions with price preview/update handling.
Also improve host/proxy middleware behavior by trusting loopback hosts when FQDN
is set and auto-enabling secure session cookies for HTTPS requests behind
proxies when session.secure is unset.
Includes feature tests for loopback trust and secure cookie auto-detection.
