Add notification system, notification bell, admin/account tests, and footer legal links
- 6 notification classes: PaymentSucceeded, PaymentFailed, SubscriptionCreated,
SubscriptionCancelled, ServiceProvisioned, InvoiceGenerated (mail + database)
- Wire notifications to existing event listeners + new subscription listeners
- NotificationBell component in Account and Admin layouts
- NotificationController with index, markAsRead, markAllAsRead endpoints
- 62 new Pest tests: AdminPanelTest (admin CRUD) + CustomerAccountTest (account features)
- Add Legal links column to marketing footer
- 114 tests passing (623 assertions)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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