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.
Add optional chaining operator (?.) to all preview property accesses in the
subscription actions view to prevent potential null reference errors when the
preview object is undefined.
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.
