fix: allow comma in amount validation

lib/validation.ts

@@ -1,18 +1,31 @@
 import { z } from "zod";
 
+function normalizeAmountInput(rawValue: string): string {
+  const compact = rawValue.trim().replace(/\s+/g, "");
+
+  if (compact.includes(",") && compact.includes(".")) {
+    return compact;
+  }
+
+  return compact.replace(",", ".");
+}
+
 export const amountSchema = z
   .string()
-  .trim()
   .min(1, "Enter an amount")
-  .refine((value) => !Number.isNaN(Number(value)), "Enter a valid number")
+  .transform((value) => normalizeAmountInput(value))
+  .refine(
+    (value) => /^(?:\d+(\.\d+)?|\.\d+)$/.test(value),
+    "Enter a valid number",
+  )
   .transform((value) => Number(value))
   .refine((value) => Number.isFinite(value), "Enter a valid number")
   .refine((value) => value > 0, "Amount must be greater than zero")
   .refine((value) => value <= 1_000_000_000_000, "Amount is too large");
 
-export function validateAmount(amount: string):
+export function validateAmount(
-  | { ok: true; value: number }
+  amount: string,
-  | { ok: false; error: string } {
+): { ok: true; value: number } | { ok: false; error: string } {
   const result = amountSchema.safeParse(amount);
 
   if (result.success) {
@@ -21,6 +34,6 @@ export function validateAmount(amount: string):
 
   return {
     ok: false,
-    error: result.error.issues[0]?.message ?? "Invalid amount"
+    error: result.error.issues[0]?.message ?? "Invalid amount",
   };
 }