Add TLS Certificates page to Advanced section of web UI

New page at /advanced/certificates showing:
- Overview card with central domain, cert count, Cloudflare token status
- Auto-provision readiness badge (requires CF token + operator email)
- Table of all domains needing TLS with: domain, source, expiry date,
  issuer, and status badges (days left / covered by wildcard / missing)
- Per-domain "Provision" button for missing certs when auto-provision ready
- "Provision" and "Renew All" action buttons
- Guidance alert when prerequisites are missing

Also fixes pre-existing type errors:
- AppSidebar: guard daemon index access when undefined
- DomainsComponent: fix circular type reference in filter state
- DomainTopology: remove unused isWildcard variable

web/src/components/domains/DomainTopology.tsx

@@ -227,7 +227,6 @@ function FlowNode({ data }: NodeProps) {
   if (v === 'tls') {
     const status = data.status as NodeStatus;
     const certDomain = data.certDomain as string | undefined;
-    const isWildcard = data.isWildcardCert as boolean;
     const daysLeft = data.daysLeft as number;
     const hasCert = data.hasCert as boolean;
     const provisionDomain = data.provisionDomain as string;