feat(uat-batch): Groups F + G + H — DocsHub/signing + admin consolidation + email

F27–F29, G30, G31, H32, H33 from the 2026-05-21 plan.

Shipped now:
  F28  Past-milestones expandable history. The Past strip on the
       Interest overview becomes an <Accordion> — each row collapses
       to the same one-line summary as before, expands to render the
       full <MilestoneSection> (steps list, sub-status, inline doc
       actions). Reuses the existing MilestoneSection so no new
       per-milestone rendering needs to be maintained.
  F29  Watchers configurable at document creation time. The unified
       create-document wizard gets a Watchers section with a
       multi-select checkbox list backed by /api/v1/admin/users/picker.
       Selected user ids are sent in the `watchers` array on the POST
       (replacing the prior hardcoded `[]`). UI matches the
       post-creation WatchersCard so reps see the same identity rows
       regardless of entry point.
  G30  /admin/invitations merged into /admin/users. The Users page
       now wraps the existing UserList + InvitationsManager in a
       Tabs control (Active users / Invitations). The standalone
       /admin/invitations route returns a redirect to the merged page
       for bookmark back-compat. Removed nav catalog entry +
       admin-sections-browser tile; extended the Users catalog
       keywords with "invitations / pending invites / onboarding"
       so command-K search still lands on the right surface.
  G31  /admin/ai picks up the berth-PDF-parser section + a "planned
       AI surfaces" placeholder. Berth PDF parser remains
       env-configured today; the page now documents it so admins
       don't hunt for the controls. Closes the "where do I configure
       AI?" loop.
  H32  Email settings explainer panel above the SMTP cards. Spells
       out why noreply + sales have separate credentials and which
       workflows ship from each mailbox. Existing field titles
       gained the "(noreply)" suffix so the model maps cleanly.
  H33  Supplemental-info-request email rebuilt to use the shared
       branded shell (logo + blurred overhead background + max-
       width 600 table layout) instead of the prior plain-HTML
       page. Per-port branding (logo / primary color / background /
       header / footer) flows from getPortBrandingConfig. CTA
       button picks up the port's primary color.

Already shipped (verified pre-shipped):
  F27  DocumentsHub root view already hides the breadcrumb via
       `selectedFolderId !== undefined` conditional.

Verified: tsc clean, vitest 1454/1454.

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

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

@@ -1,4 +1,4 @@
-import { Bot } from 'lucide-react';
+import { Bot, FileScan, Lightbulb } from 'lucide-react';
 
 import { RegistryDrivenForm } from '@/components/admin/shared/registry-driven-form';
 import { PageHeader } from '@/components/shared/page-header';
@@ -10,7 +10,7 @@ export default function AiAdminPage() {
     <div className="space-y-6">
       <PageHeader
         title="AI configuration"
-        description="One place to manage every AI-using feature. Provider credentials and the master AI switch live here; per-feature thresholds remain in their dedicated pages, linked below."
+        description="One place to manage every AI-using feature. Provider credentials and the master AI switch live here; per-feature thresholds are embedded below."
         eyebrow="ADMIN"
       />
 
@@ -40,6 +40,46 @@ export default function AiAdminPage() {
           <OcrSettingsForm embedded />
         </CardContent>
       </Card>
+
+      {/*
+        Berth-PDF parser AI fallback — currently configured via the
+        BERTH_PDF_PARSER_* env vars. No per-port override surface today;
+        when one is added, it lands here so admins don't have to hunt.
+      */}
+      <Card>
+        <CardHeader>
+          <CardTitle className="text-base flex items-center gap-2">
+            <FileScan className="h-4 w-4" /> Berth PDF parser
+          </CardTitle>
+          <CardDescription>
+            3-tier extraction (AcroForm → on-device OCR → AI fallback on low confidence) for
+            per-berth PDFs and brochures. Provider + confidence threshold are env-controlled today
+            (BERTH_PDF_PARSER_PROVIDER, BERTH_PDF_PARSER_CONFIDENCE_FLOOR); a per-port override UI
+            lands in a follow-up. The master switch above gates the AI tier across every port.
+          </CardDescription>
+        </CardHeader>
+      </Card>
+
+      {/*
+        Future AI surfaces. Each gets a section here once it ships:
+          - Recommender embeddings (currently rule-based, not LLM-based)
+          - Contact-log action extraction (deferred — needs user demand)
+          - Inquiry-form auto-classification (deferred)
+        Listing them inert here closes the "where do I configure AI?"
+        loop — admins land on /admin/ai and see the full landscape.
+      */}
+      <Card>
+        <CardHeader>
+          <CardTitle className="text-base flex items-center gap-2 text-muted-foreground">
+            <Lightbulb className="h-4 w-4" /> Planned AI surfaces
+          </CardTitle>
+          <CardDescription>
+            Recommender embeddings, contact-log action extraction, and inquiry-form auto-
+            classification are queued. They will surface as additional sections on this page when
+            shipped, with no scattered admin entries to hunt down.
+          </CardDescription>
+        </CardHeader>
+      </Card>
     </div>
   );
 }