feat(bulk-berths): 2-step wizard for new-port setup

Step 5 per PRE-DEPLOY-PLAN § 1.4.13.

Service: bulkAddBerths(portId, inputs, meta) — input-level dedup
catches in-batch duplicates, then a single SELECT against existing
port rows rejects with ConflictError on first collision. All inserts
in one round-trip; audit log + realtime alert.

Validator: bulkAddBerthsSchema with min(1) max(500) per call.

Route: POST /api/v1/berths/bulk-add gated on berths.create.

Wizard UI (/[portSlug]/admin/berths/bulk-add):
  Step 1 — dock letter A-E, range start+end mooring numbers, tenure
    default. Generates N empty rows.
  Step 2 — editable table with per-row dimensions / pontoon / pricing.
    "Apply to all" inputs in the header row copy a value down every
    row at once (covers the "every row is 40ft × 15ft at €125k" case
    in two clicks). Per-row remove button.

Drag-fill deferred. Server-side mooring uniqueness check is canonical;
client-side dedup is a pre-flight courtesy.

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

src/app/(dashboard)/[portSlug]/admin/berths/bulk-add/page.tsx

@@ -0,0 +1,14 @@
+import { PageHeader } from '@/components/shared/page-header';
+import { BulkAddBerthsWizard } from '@/components/admin/bulk-add-berths-wizard';
+
+export default function BulkAddBerthsPage() {
+  return (
+    <div className="space-y-6">
+      <PageHeader
+        title="Bulk add berths"
+        description="Create many berths at once. Pick a dock letter + range to generate the rows, then fill in per-row dimensions / pricing / pontoon. Standard fields (tenure, status) apply to every row; everything else is per-row."
+      />
+      <BulkAddBerthsWizard />
+    </div>
+  );
+}