Fix form keyboard issues and sticky footers in agent screens

src/utils/validation.ts

@@ -0,0 +1,10 @@
+export const isValidPhone = (value: string) => /^[0-9]{10}$/.test(value.replace(/\D/g, ''));
+
+export const isValidOtp = (value: string) => /^[0-9]{6}$/.test(value);
+
+export const isValidMpin = (value: string) => /^[0-9]{4}$/.test(value);
+
+export const isValidAmount = (value: string) => {
+  const amount = Number(value);
+  return Number.isFinite(amount) && amount > 0;
+};