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/expenses/expense-form-dialog.tsx

@@ -59,11 +59,11 @@ export function ExpenseFormDialog({ open, onOpenChange, expense }: ExpenseFormDi
         establishmentName: expense.establishmentName ?? undefined,
         amount: Number(expense.amount),
         currency: expense.currency,
-        category: expense.category as string,
-        paymentMethod: expense.paymentMethod as string,
+        category: expense.category as CreateExpenseInput['category'],
+        paymentMethod: expense.paymentMethod as CreateExpenseInput['paymentMethod'],
         payer: expense.payer ?? undefined,
         expenseDate: new Date(expense.expenseDate),
-        paymentStatus: (expense.paymentStatus as string) ?? 'unpaid',
+        paymentStatus: (expense.paymentStatus as CreateExpenseInput['paymentStatus']) ?? 'unpaid',
       });
     } else if (open && !expense) {
       reset({
@@ -161,7 +161,7 @@ export function ExpenseFormDialog({ open, onOpenChange, expense }: ExpenseFormDi
           <div className="space-y-2">
             <Label htmlFor="category">Category</Label>
             <Select
-              onValueChange={(v) => setValue('category', v as string)}
+              onValueChange={(v) => setValue('category', v as CreateExpenseInput['category'])}
               defaultValue={expense?.category ?? undefined}
             >
               <SelectTrigger id="category">
@@ -180,7 +180,7 @@ export function ExpenseFormDialog({ open, onOpenChange, expense }: ExpenseFormDi
           <div className="space-y-2">
             <Label htmlFor="paymentMethod">Payment Method</Label>
             <Select
-              onValueChange={(v) => setValue('paymentMethod', v as string)}
+              onValueChange={(v) => setValue('paymentMethod', v as CreateExpenseInput['paymentMethod'])}
               defaultValue={expense?.paymentMethod ?? undefined}
             >
               <SelectTrigger id="paymentMethod">