feat(form-error-ux): adopt useFormScrollToError + FormErrorSummary across remaining 10 forms

Completes the form-error rollout the prior session shipped on the 6
highest-impact forms (client/interest/yacht/company/berth/expense). Adds
the scroll-to-first-error wrapper + the top-of-form summary banner to:

- src/app/(auth)/login/page.tsx
- src/app/(auth)/reset-password/page.tsx
- src/app/(auth)/set-password/page.tsx
- src/app/(auth)/setup/page.tsx
- src/app/(dashboard)/[portSlug]/invoices/new/page.tsx
- src/components/berths/berth-detail-header.tsx (status-change dialog)
- src/components/companies/add-membership-dialog.tsx
- src/components/invoices/invoice-detail.tsx (record-payment form)
- src/components/reservations/berth-reserve-dialog.tsx
- src/components/yachts/yacht-transfer-dialog.tsx

Each call site: hook wraps handleSubmit, FormErrorSummary renders only
when 2+ errors fire (no visual change otherwise), and per-form `labels`
prop translates field names to human-readable strings. invoice-line-items
is a sub-form via useFormContext, so it inherits from the parent.

1471/1471 vitest, tsc clean.

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

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

@@ -24,6 +24,8 @@ import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { OwnerPicker } from '@/components/shared/owner-picker';
 import { CurrencySelect } from '@/components/shared/currency-select';
 import { InvoiceLineItems } from '@/components/invoices/invoice-line-items';
+import { FormErrorSummary } from '@/components/forms/form-error-summary';
+import { useFormScrollToError } from '@/hooks/use-form-scroll-to-error';
 import { apiFetch } from '@/lib/api/client';
 import { formatCurrency } from '@/lib/utils/currency';
 import type { z } from 'zod';
@@ -96,6 +98,7 @@ export default function NewInvoicePage() {
     setValue,
     formState: { errors },
   } = methods;
+  const submitWithScroll = useFormScrollToError(handleSubmit, errors);
 
   const watchedValues = watch();
   const isDepositInvoice = watchedValues.kind === 'deposit';
@@ -219,7 +222,18 @@ export default function NewInvoicePage() {
       </div>
 
       <FormProvider {...methods}>
-        <form onSubmit={handleSubmit(onSubmit)} className="space-y-6">
+        <form onSubmit={submitWithScroll(onSubmit)} className="space-y-6">
+          <FormErrorSummary
+            errors={errors}
+            labels={{
+              billingEntity: 'Billing entity',
+              billingEmail: 'Billing email',
+              dueDate: 'Due date',
+              lineItems: 'Line items',
+              currency: 'Currency',
+              paymentTerms: 'Payment terms',
+            }}
+          />
           {/* Step 1: Client Info */}
           {step === 1 && (
             <Card>