<h4>SSL Annual Cost - Billing Integration</h4><h5>New Feature</h5><ul><li><strong>Annual Renewal Cost field</strong> added to SSL admin form</li><li><strong>Auto-invoice generation</strong> via cron 30 days before SSL expiration</li><li><strong>Billing summary integration</strong> — SSL annual costs included in tenant estimated monthly</li><li><strong>Tenant subscription UI</strong> — SSL Certificates section added</li></ul><h5>Database</h5><ul><li>Added <code>annual_cost DECIMAL(10,2)</code> to domain_names_ssl_certificates</li></ul><h5>Files Modified</h5><ul><li>ssl.controller.php — captures ssl_annual_cost</li><li>ssl.php — annual cost input + JS population</li><li>billing.class.php — getActiveSSLCertificatesForSite + getSSLCertificatesDueSoon methods</li><li>BillingService.php — generateSSLRenewalInvoices + getTenantBillingSummary updated</li><li>billing.controller.php — getSubscriptionDetails returns ssl_certificates</li><li>cron/index.php — wired SSL renewal check</li><li>subscription.php + billing_js.php — SSL display in tenant UI</li></ul>