Fix all TypeScript errors: restore proper types and typed route casts

- Restore `as any` casts for Next.js typedRoutes on dynamic routes
- Use proper types for PDF templates, invoice/expense data, DB schema
- Fix PgColumn casts in sort helpers for expenses/invoices
- Add null guards for optional port/client in record-export
- Fix vitest config (remove invalid poolOptions)
- Lint: 0 errors, TypeScript: 0 errors

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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

@@ -70,11 +70,11 @@ export default function NewInvoicePage() {
 
   const createMutation = useMutation({
     mutationFn: (data: CreateInvoiceInput) =>
-      apiFetch('/api/v1/invoices', {
+      apiFetch<{ data?: { id?: string } }>('/api/v1/invoices', {
         method: 'POST',
         body: data,
       }),
-    onSuccess: (res: { data?: { id?: string } }) => {
+    onSuccess: (res) => {
       const id = res?.data?.id;
       if (id) {
         router.push(`/${portSlug}/invoices/${id}`);