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/components/layout/sidebar.tsx

@@ -112,7 +112,8 @@ function NavItemLink({
 }) {
   const content = (
     <Link
-      href={item.href}
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      href={item.href as any}
       className={cn(
         'flex items-center gap-3 px-3 py-2 rounded-md text-sm font-medium transition-colors duration-150',
         'text-[#cdcfd6] hover:bg-[#171f35] hover:text-white',