- Fix IPv6 host parsing with _strip_port() utility
- Remove dangerous StorePlatform→Store.subdomain silent fallback
- Close storefront gate bypass when frontend_type is None
- Add custom subdomain management UI and API for stores
- Add domain health diagnostic tool
- Convert db.add() in loops to db.add_all() (24 PERF-006 fixes)
- Add tests for all new functionality (18 subdomain service tests)
- Add .github templates for validator compliance
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add StorefrontAccessMiddleware that blocks storefront access for stores
without an active subscription, returning a multilingual unavailable page
(en/fr/de/lb) for page requests and JSON 403 for API requests. Multi-platform
aware: resolves subscription for detected platform with fallback to primary.
Also includes yesterday's session work:
- Module-driven storefront navigation via FrontendType.STOREFRONT menu declarations
- shop/ → storefront/ URL rename across 30+ templates
- Subscription context (tier_code) passed to storefront templates
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>