APY integrated and Account UI done

lib/features/yojna/screens/apy_register_screen.dart

@@ -1,4 +1,3 @@
-import 'dart:convert';
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import 'package:kmobile/api/services/yojna_service.dart';
@@ -212,6 +211,29 @@ class _APYRegisterScreenState extends State<APYRegisterScreen> {
 
   void _handleRegister() async {
     if (_formKey.currentState!.validate()) {
+      final age = int.tryParse(_ageOfJoiningController.text) ?? 0;
+      if (age < 18 || age > 40) {
+        showDialog(
+          context: context,
+          barrierDismissible: false,
+          builder: (context) => AlertDialog(
+            title: const Text('Age Restriction'),
+            content: const Text(
+                'Age of joining must be between 18 and 40 years to register for APY.'),
+            actions: [
+              TextButton(
+                onPressed: () {
+                  Navigator.pop(context); // Close dialog
+                  Navigator.popUntil(context, (route) => route.isFirst);
+                },
+                child: const Text('OK'),
+              ),
+            ],
+          ),
+        );
+        return;
+      }
+
       showDialog(
         context: context,
         barrierDismissible: false,