feat(admin): per-port email/Documenso/branding/reminder settings + invitations

Centralizes everything operators need to configure into the admin panel,
each setting per-port with env fallback.

New admin pages
- /admin              landing page linking to every admin section as a card
- /admin/email        FROM name+address, reply-to, signature/footer HTML,
                      optional SMTP host/port/user/pass override
- /admin/documenso    API URL+key override, EOI Documenso template ID,
                      default EOI pathway (documenso-template vs inapp),
                      "Test connection" button
- /admin/branding     logo URL, primary color, app name, email
                      header/footer HTML
- /admin/reminders    port-level defaults for new interests +
                      port-wide daily-digest delivery window
- /admin/invitations  send / list / resend / revoke CRM invitations

Per-user reminder digest
- /notifications/preferences gains a Reminder digest card:
  immediate / daily / weekly / off, with HH:MM, day-of-week,
  IANA timezone fields. Stored in user_profiles.preferences.reminders.

Plumbing
- port-config.ts typed accessors (getPortEmailConfig, getPortDocumensoConfig,
  getPortBrandingConfig, getPortReminderConfig) — settings → env fallback.
- sendEmail accepts optional portId; resolves From/SMTP from settings
  when supplied.
- documensoFetch + downloadSignedPdf accept optional portId; each public
  function takes it through. checkDocumensoHealth() backs the test button.
- crm-invite.service gains listCrmInvites / revokeCrmInvite / resendCrmInvite
  with audit-log entries (revoke_invite, resend_invite added to AuditAction).
- AdminLandingPage card grid + shared SettingsFormCard component to remove
  per-page form boilerplate.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/(dashboard)/[portSlug]/admin/page.tsx

@@ -0,0 +1,196 @@
+import Link from 'next/link';
+import {
+  Bell,
+  Briefcase,
+  Database,
+  FileText,
+  HardDrive,
+  Key,
+  LayoutDashboard,
+  Mail,
+  Palette,
+  ScrollText,
+  Settings,
+  Shield,
+  Sliders,
+  Tag,
+  Upload,
+  Users,
+  Webhook,
+} from 'lucide-react';
+
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+
+interface AdminSection {
+  href: string;
+  label: string;
+  description: string;
+  icon: typeof Settings;
+}
+
+const SECTIONS: AdminSection[] = [
+  {
+    href: 'users',
+    label: 'Users',
+    description: 'CRM accounts, role assignments, and per-user residential access toggles.',
+    icon: Users,
+  },
+  {
+    href: 'invitations',
+    label: 'Invitations',
+    description: 'Send invitations, track pending invites, and resend or revoke them.',
+    icon: Mail,
+  },
+  {
+    href: 'roles',
+    label: 'Roles & Permissions',
+    description: 'Default permission sets and per-port role overrides.',
+    icon: Shield,
+  },
+  {
+    href: 'audit',
+    label: 'Audit Log',
+    description: 'Searchable log of every authenticated mutation in the system.',
+    icon: ScrollText,
+  },
+  {
+    href: 'email',
+    label: 'Email Settings',
+    description: 'From address, signatures, and per-port SMTP overrides.',
+    icon: Mail,
+  },
+  {
+    href: 'documenso',
+    label: 'Documenso & EOI',
+    description: 'API credentials, EOI template, and default in-app vs Documenso pathway.',
+    icon: FileText,
+  },
+  {
+    href: 'reminders',
+    label: 'Reminders',
+    description: 'Default reminder behaviour and the daily-digest delivery window.',
+    icon: Bell,
+  },
+  {
+    href: 'branding',
+    label: 'Branding',
+    description: 'App name, logo, primary color, and email header/footer HTML.',
+    icon: Palette,
+  },
+  {
+    href: 'settings',
+    label: 'System Settings',
+    description: 'Generic key/value configuration store for advanced flags.',
+    icon: Settings,
+  },
+  {
+    href: 'webhooks',
+    label: 'Webhooks',
+    description: 'Outgoing webhook subscriptions, secrets, and delivery log.',
+    icon: Webhook,
+  },
+  {
+    href: 'forms',
+    label: 'Forms',
+    description: 'Form templates used by client-facing inquiry and intake flows.',
+    icon: Sliders,
+  },
+  {
+    href: 'templates',
+    label: 'Document Templates',
+    description: 'PDF + email templates with merge-field placeholders.',
+    icon: FileText,
+  },
+  {
+    href: 'tags',
+    label: 'Tags',
+    description: 'Color-coded tags applied to clients, yachts, companies, and interests.',
+    icon: Tag,
+  },
+  {
+    href: 'custom-fields',
+    label: 'Custom Fields',
+    description: 'Tenant-defined fields for clients, yachts, and reservations.',
+    icon: Key,
+  },
+  {
+    href: 'reports',
+    label: 'Reports',
+    description: 'Saved analytics views and ad-hoc query results.',
+    icon: LayoutDashboard,
+  },
+  {
+    href: 'monitoring',
+    label: 'Queue Monitoring',
+    description: 'BullMQ queue health, throughput, and retry diagnostics.',
+    icon: Database,
+  },
+  {
+    href: 'import',
+    label: 'Bulk Import',
+    description: 'CSV-driven imports for clients, yachts, and reservations.',
+    icon: Upload,
+  },
+  {
+    href: 'backup',
+    label: 'Backup & Restore',
+    description: 'Database snapshots and on-demand exports.',
+    icon: HardDrive,
+  },
+  {
+    href: 'ports',
+    label: 'Ports',
+    description: 'Manage the marinas/ports this installation serves.',
+    icon: Briefcase,
+  },
+  {
+    href: 'onboarding',
+    label: 'Onboarding',
+    description: 'Initial-setup wizard for fresh ports.',
+    icon: LayoutDashboard,
+  },
+];
+
+export default async function AdminLandingPage({
+  params,
+}: {
+  params: Promise<{ portSlug: string }>;
+}) {
+  const { portSlug } = await params;
+  return (
+    <div className="space-y-6">
+      <div>
+        <h1 className="text-2xl font-semibold">Administration</h1>
+        <p className="text-sm text-muted-foreground">
+          Per-port configuration and system administration. Each card below opens a dedicated
+          settings page.
+        </p>
+      </div>
+      <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
+        {SECTIONS.map((s) => {
+          const Icon = s.icon;
+          return (
+            <Link
+              key={s.href}
+              // eslint-disable-next-line @typescript-eslint/no-explicit-any
+              href={`/${portSlug}/admin/${s.href}` as any}
+              className="block group"
+            >
+              <Card className="h-full transition-colors group-hover:border-primary/50 group-hover:bg-muted/30">
+                <CardHeader className="flex flex-row items-start gap-3 space-y-0 pb-2">
+                  <Icon className="h-5 w-5 mt-0.5 text-muted-foreground group-hover:text-primary" />
+                  <div className="flex-1">
+                    <CardTitle className="text-base">{s.label}</CardTitle>
+                  </div>
+                </CardHeader>
+                <CardContent>
+                  <CardDescription>{s.description}</CardDescription>
+                </CardContent>
+              </Card>
+            </Link>
+          );
+        })}
+      </div>
+    </div>
+  );
+}