feat(uat-b1): ship Wave A-E of Bucket 1 audit findings

Wave A (Interest+EOI form quick wins):
- Auto-select yacht after inline-create from interest form
- EOI generate dialog: "View EOI" action toast
- Interest form berth picker: formatBerthRange compact label
- Remove "Generate EOI" button from Documents tab (clean removal)
- Interest auto-assign: only sales_agent/sales_manager auto-claim
  ownership on create (explicit role check via user_port_roles join)
- LinkedBerthRowItem dims: drop "D" suffix + "L × W" format
- ExternalEoiUploadDialog: prefillSignatories prop threaded from
  active EOI signers
- EOI signature progress on Overview milestone card footer

Wave B (a11y + i18n sweeps):
- aria-live on supplemental-info error state
- text-[10px] -> text-xs in client-pipeline-summary
- Currency formatter: locale default removed (Intl uses runtime)
- en-US/en-GB hardcoded toLocaleString swept across 13 components

Wave C (Primary berth always in EOI bundle):
- Service guard strengthened on update path
- Migration 0083 backfills historical primary rows

Wave D (Onboarding super_admin discoverability):
- /api/v1/admin/onboarding/status endpoint + shared service
- Topbar OnboardingBanner (super_admin, session-dismissible)
- OnboardingTile dashboard widget (rail group, self-hides at 100%)
- Celebration toast + invalidate of shared status on last tick

Wave E (Branded post-completion email idempotency):
- Verified handleDocumentCompleted already owns the email fan-out
- Added regression test for the polling path + idempotency

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

src/components/dashboard/dashboard-shell.tsx

@@ -30,8 +30,8 @@ function rangeLabel(range: DateRange): string {
       year: 'numeric',
       timeZone: 'UTC',
     };
-    const from = new Date(`${range.from}T00:00:00.000Z`).toLocaleDateString('en-US', fmt);
-    const to = new Date(`${range.to}T00:00:00.000Z`).toLocaleDateString('en-US', fmt);
+    const from = new Date(`${range.from}T00:00:00.000Z`).toLocaleDateString(undefined, fmt);
+    const to = new Date(`${range.to}T00:00:00.000Z`).toLocaleDateString(undefined, fmt);
     return `${from} – ${to}`;
   }
   return PRESET_LABELS[range];

src/components/dashboard/date-range-picker.tsx

@@ -32,7 +32,7 @@ function formatCustom(range: { from: string; to: string }): string {
   const fmt: Intl.DateTimeFormatOptions = sameYear
     ? { month: 'short', day: 'numeric', timeZone: 'UTC' }
     : { month: 'short', day: 'numeric', year: 'numeric', timeZone: 'UTC' };
-  return `${from.toLocaleDateString('en-US', fmt)} – ${to.toLocaleDateString('en-US', fmt)}`;
+  return `${from.toLocaleDateString(undefined, fmt)} – ${to.toLocaleDateString(undefined, fmt)}`;
 }
 
 /**

src/components/dashboard/onboarding-tile.tsx

@@ -0,0 +1,83 @@
+'use client';
+
+import Link from 'next/link';
+import { useParams } from 'next/navigation';
+import { ChevronRight, Sparkles } from 'lucide-react';
+
+import { Button } from '@/components/ui/button';
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
+import { Progress } from '@/components/ui/progress';
+import { usePermissions } from '@/hooks/use-permissions';
+import { useOnboardingStatus } from '@/hooks/use-onboarding-status';
+
+/**
+ * Compact dashboard tile that surfaces onboarding progress for super_admins
+ * while the checklist is incomplete. Collapses (returns null) once setup is
+ * 100% complete so the dashboard doesn't stay cluttered after the org is
+ * past the initial onboarding phase. Non-super-admin users never see it.
+ */
+export function OnboardingTile() {
+  const params = useParams<{ portSlug: string }>();
+  const portSlug = params?.portSlug ?? '';
+  const { isSuperAdmin } = usePermissions();
+  const { data, isLoading } = useOnboardingStatus({ enabled: isSuperAdmin });
+
+  if (!isSuperAdmin) return null;
+  if (isLoading) {
+    return (
+      <Card>
+        <CardHeader>
+          <CardTitle className="flex items-center gap-2 text-sm">
+            <Sparkles className="size-4 text-brand-600" aria-hidden />
+            Setup checklist
+          </CardTitle>
+        </CardHeader>
+        <CardContent>
+          <Progress value={0} className="h-2" />
+        </CardContent>
+      </Card>
+    );
+  }
+  if (!data || data.isComplete) return null;
+
+  return (
+    <Card className="border-brand-200 bg-brand-50/30">
+      <CardHeader className="pb-2">
+        <CardTitle className="flex items-center gap-2 text-sm">
+          <Sparkles className="size-4 text-brand-600" aria-hidden />
+          Setup checklist
+        </CardTitle>
+      </CardHeader>
+      <CardContent className="space-y-3">
+        <div className="space-y-1">
+          <Progress value={data.percent} className="h-2" />
+          <p className="text-xs text-muted-foreground">
+            {data.completed} of {data.total} steps complete ({data.percent}%)
+          </p>
+        </div>
+        {data.nextStep ? (
+          <div className="rounded-md border border-dashed border-brand-200 bg-white/60 p-2">
+            <p className="text-[10px] font-semibold uppercase tracking-wide text-brand-700">
+              Next step
+            </p>
+            <p className="mt-0.5 text-xs text-foreground">{data.nextStep.label}</p>
+          </div>
+        ) : null}
+        {portSlug ? (
+          <Button asChild size="sm" variant="outline" className="w-full">
+            <Link
+              href={
+                (data.nextStep
+                  ? `/${portSlug}/admin/${data.nextStep.href}`
+                  : `/${portSlug}/admin/onboarding`) as never
+              }
+            >
+              {data.nextStep ? 'Continue setup' : 'Open checklist'}
+              <ChevronRight className="ml-1 size-3" aria-hidden />
+            </Link>
+          </Button>
+        ) : null}
+      </CardContent>
+    </Card>
+  );
+}

src/components/dashboard/widget-registry.tsx

@@ -15,6 +15,7 @@ import dynamic from 'next/dynamic';
 
 import { ActiveDealsTile } from './active-deals-tile';
 import { ActivityFeed } from './activity-feed';
+import { OnboardingTile } from './onboarding-tile';
 import { BerthHeatWidget } from './berth-heat-widget';
 import { ClientsByCountryWidget } from './clients-by-country-widget';
 import { HotDealsCard } from './hot-deals-card';
@@ -105,6 +106,19 @@ export interface DashboardWidget {
 }
 
 export const DASHBOARD_WIDGETS: readonly DashboardWidget[] = [
+  // ── Onboarding (rail, super_admin-only) ─────────────────────────────
+  // Self-collapses when the checklist hits 100% and self-hides for
+  // non-super-admin users so most reps never see this tile at all.
+  {
+    id: 'onboarding_checklist',
+    label: 'Setup checklist',
+    description:
+      'Progress + next-step nudge while the org is still going through Documenso / branding / users setup. Hidden once 100% complete.',
+    render: () => <OnboardingTile />,
+    group: 'rail',
+    defaultVisible: true,
+  },
+
   // ── KPI tiles (rail) ────────────────────────────────────────────────
   // Off by default - keep the existing dashboard layout unchanged for
   // users on first paint after the upgrade; reps can flip them on from