feat(admin): inquiry inbox, send log, email-template overrides, reports dashboard, recommender keys, role-editor coverage; replace placeholder pages

Closes the bulk of audit-pass-#1 admin gaps in one batch.

New admin pages:
- /admin/inquiries reads website_submissions with filter chips for
  berth/residence/contact + payload viewer per row.
- /admin/sends reads document_sends with sent/failed filter chips and
  expandable body markdown; failures surface errorReason and any
  fallback-to-link reason from the SMTP retry.
- /admin/email-templates lets per-port admins override the subject of
  each transactional template (8 templates catalogued in
  template-catalog.ts). Body editing is a follow-on; portal_activation
  + portal_reset are wired to honor the override via loadSubjectOverride.
- /admin/reports replaces the "Coming in Layer 3" placeholder with a
  KPI dashboard: 4 KPI tiles, pipeline funnel bars, berth occupancy
  donut-bars, conversion %, refresh every 60s.
- backup/import/onboarding admin pages replace placeholders with
  actionable guidance: backup posture + planned features, available CLI
  imports + planned UI, ordered onboarding checklist linking to admin
  pages.

Existing pages widened:
- settings-manager exposes the 9 berth-recommender tunables that were
  previously code-only (recommender_*, heat_weight_*, fallthrough_*,
  tier_ladder_hide_late_stage).
- role-form covers all 19 RolePermissions schema groups; previously
  missing yachts/companies/memberships/reservations + missing
  documents.edit + files.edit checkboxes. snake_case residential
  labels replaced with friendly text.

portal-auth.service.ts now also writes audit_log rows for portal
invite, resend, activate, password-reset request, and reset (closes one
more audit-pass-#2 gap while we were touching the file).

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

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

@@ -5,6 +5,7 @@ import {
   Database,
   FileText,
   HardDrive,
+  Inbox,
   Key,
   LayoutDashboard,
   Mail,
@@ -120,6 +121,12 @@ const GROUPS: AdminGroup[] = [
         description: 'PDF + email templates with merge-field placeholders.',
         icon: FileText,
       },
+      {
+        href: 'email-templates',
+        label: 'Email Templates',
+        description: 'Customize subject lines for transactional emails (portal, inquiry, invite).',
+        icon: Mail,
+      },
       {
         href: 'tags',
         label: 'Tags',
@@ -138,6 +145,19 @@ const GROUPS: AdminGroup[] = [
     title: 'Data Quality',
     description: 'Cleanup, imports, and the audit trail.',
     sections: [
+      {
+        href: 'inquiries',
+        label: 'Inquiry Inbox',
+        description:
+          'Submissions captured from the public marketing site (berth, residence, contact).',
+        icon: Inbox,
+      },
+      {
+        href: 'sends',
+        label: 'Send Log',
+        description: 'Brochure and per-berth PDF sends, with delivery failures surfaced for retry.',
+        icon: Mail,
+      },
       {
         href: 'duplicates',
         label: 'Duplicates',