feat(phase-b): ship analytics dashboard, alerts, scanner PWA, dedup, audit view

Phase B (Insights & Alerts) PR4-11 in one drop. Builds on the schema +
service skeletons committed in PRs 1-3.

PR4  Analytics dashboard — 4 chart types (funnel/timeline/breakdown/source),
     date-range picker (today/7d/30d/90d), CSV+PNG export per card.
PR5  Alert rail UI + /alerts page — topbar bell w/ live count, dashboard
     right-rail, three-tab page (active/dismissed/resolved), socket-driven
     invalidation. Bell lazy-loads list on popover open to keep cold pages
     fast in non-dashboard routes.
PR6  EOI queue tab on documents hub — filters to in-flight EOIs, count
     surfaces in tab label.
PR7  Interests-by-berth tab on berth detail — replaces the stub.
PR8  Expense duplicate detection — BullMQ job runs scan on create, yellow
     banner on detail w/ Merge / Not-a-duplicate, transactional merge
     consolidates receipts and archives the source.
PR9  Receipt scanner PWA + multi-provider AI — port-scoped /scan route in
     its own (scanner) group with no dashboard chrome, dynamic per-port
     manifest, OpenAI + Claude provider abstraction, admin OCR settings
     page (port-level + super-admin global default w/ opt-in fallback),
     test-connection endpoint, manual-entry fallback when no key is
     configured. Verify form always shown before save — no ghost rows.
PR10 Audit log read view — swap to tsvector full-text search on the
     existing GIN index, cursor pagination, filters for entity/action/user
     /date range, batched actor-email resolution.
PR11 Real-API tests — opt-in receipt-ocr.spec (admin save+test, optional
     real-receipt parse via REALAPI_RECEIPT_FIXTURE) and alert-engine
     socket-fanout spec gated behind RUN_ALERT_ENGINE_REALAPI. Both skip
     cleanly without their gate envs so CI stays green.

Test totals: vitest 690 -> 713, smoke 130 -> 138, realapi +2 opt-in.

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

src/components/alerts/alert-bell.tsx

@@ -0,0 +1,84 @@
+'use client';
+
+import { useState } from 'react';
+import Link from 'next/link';
+import { ShieldAlert } from 'lucide-react';
+
+import { Button } from '@/components/ui/button';
+import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover';
+import { ScrollArea } from '@/components/ui/scroll-area';
+import { Separator } from '@/components/ui/separator';
+import { useUIStore } from '@/stores/ui-store';
+import { cn } from '@/lib/utils';
+import { AlertCard, AlertCardEmpty } from './alert-card';
+import { useAlertCount, useAlertList, useAlertRealtime } from './use-alerts';
+
+export function AlertBell() {
+  const portSlug = useUIStore((s) => s.currentPortSlug);
+  const [open, setOpen] = useState(false);
+  // Count is cheap (one aggregate query) — fire on every page so the badge stays live.
+  // List is heavier — only fetch when the popover is actually open.
+  const { data: count } = useAlertCount();
+  const { data: list, isLoading } = useAlertList('open', open);
+  useAlertRealtime();
+
+  const total = count?.total ?? 0;
+  const critical = count?.bySeverity.critical ?? 0;
+  const alerts = list?.data ?? [];
+  const top = alerts.slice(0, 5);
+
+  return (
+    <Popover open={open} onOpenChange={setOpen}>
+      <PopoverTrigger asChild>
+        <Button
+          variant="ghost"
+          size="icon"
+          className="relative"
+          aria-label={`Alerts${total > 0 ? ` (${total} active)` : ''}`}
+          data-testid="alert-bell"
+        >
+          <ShieldAlert className="h-5 w-5" />
+          {total > 0 ? (
+            <span
+              key={total}
+              data-testid="alert-bell-badge"
+              className={cn(
+                'absolute -top-0.5 -right-0.5 flex h-4 min-w-4 items-center justify-center rounded-full px-1 text-[10px] font-bold text-white shadow-sm ring-2 ring-background animate-badge-pop',
+                critical > 0 ? 'bg-destructive' : 'bg-amber-500',
+              )}
+            >
+              {total > 99 ? '99+' : total}
+            </span>
+          ) : null}
+        </Button>
+      </PopoverTrigger>
+      <PopoverContent align="end" className="w-96 p-0">
+        <div className="flex items-center justify-between px-4 py-3">
+          <h4 className="text-sm font-semibold">Active alerts</h4>
+          <Link
+            href={portSlug ? (`/${portSlug}/alerts` as never) : ('/alerts' as never)}
+            className="text-xs text-muted-foreground hover:text-foreground"
+          >
+            View all
+          </Link>
+        </div>
+        <Separator />
+        <ScrollArea className="max-h-[420px]">
+          {isLoading ? (
+            <div className="px-4 py-6 text-center text-sm text-muted-foreground">Loading…</div>
+          ) : top.length === 0 ? (
+            <div className="p-3">
+              <AlertCardEmpty />
+            </div>
+          ) : (
+            <div className="space-y-2 p-3">
+              {top.map((a) => (
+                <AlertCard key={a.id} alert={a} />
+              ))}
+            </div>
+          )}
+        </ScrollArea>
+      </PopoverContent>
+    </Popover>
+  );
+}