- Add LoyaltyFeatureProvider with 11 BINARY/MERCHANT features for billing
feature gating, wired into loyalty module definition
- Fix subscription-tiers admin page showing 0 features by populating
feature_codes from tier relationship in all admin tier endpoints
- Fix merchants admin page showing 0 stores and N/A owner by adding
store_count and owner_email to MerchantResponse and eager-loading owner
- Add "no tiers" warning with link in subscription creation modal when
platform has no configured tiers
- Add missing mobile menu panel to storefront base template so hamburger
toggle actually shows navigation links
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>