Feat : Api integrate on login screen, set login password and set transaction password screen

src/app/captcha.tsx

@@ -0,0 +1,4 @@
+export async function generateCaptcha(length = 6) {
+    const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+    return Array.from({ length }, () => chars[Math.floor(Math.random() * chars.length)]).join("");
+}