feat: Implement major features and fix theming bug

This commit introduces several new features and a critical bug fix.

- Implemented a full "Quick Pay" flow for both within and outside the bank, including IFSC validation, beneficiary verification, and a TPIN-based payment process.
- Added a date range filter to the Account Statement screen and streamlined the UI by removing the amount filters.
- Fixed a major bug that prevented dynamic theme changes from being applied. The app now correctly switches between color themes.
- Refactored and improved beneficiary management, transaction models, and the fund transfer flow to support NEFT/RTGS.

lib/data/repositories/transaction_repository.dart

@@ -1,8 +1,12 @@
+import 'dart:developer';
+
 import 'package:dio/dio.dart';
+import 'package:intl/intl.dart';
 import 'package:kmobile/data/models/transaction.dart';
 
 abstract class TransactionRepository {
-  Future<List<Transaction>> fetchTransactions(String accountNo);
+  Future<List<Transaction>> fetchTransactions(String accountNo,
+      {DateTime? fromDate, DateTime? toDate});
 }
 
 class TransactionRepositoryImpl implements TransactionRepository {
@@ -10,9 +14,23 @@ class TransactionRepositoryImpl implements TransactionRepository {
   TransactionRepositoryImpl(this._dio);
 
   @override
-  Future<List<Transaction>> fetchTransactions(String accountNo) async {
+  Future<List<Transaction>> fetchTransactions(String accountNo,
+      {DateTime? fromDate, DateTime? toDate}) async {
+    final queryParameters = <String, String>{};
 
-    final resp = await _dio.get('/api/transactions/account/$accountNo');
+    if (fromDate != null) {
+      queryParameters['fromDate'] = DateFormat('ddMMyyyy').format(fromDate);
+    }
+    if (toDate != null) {
+      queryParameters['toDate'] = DateFormat('ddMMyyyy').format(toDate);
+    }
+
+    log('query params below');
+    log(queryParameters.toString());
+    final resp = await _dio.get(
+      '/api/transactions/account/$accountNo',
+      queryParameters: queryParameters.isNotEmpty ? queryParameters : null,
+    );
 
     if (resp.statusCode != 200) {
       throw Exception(
@@ -25,4 +43,4 @@ class TransactionRepositoryImpl implements TransactionRepository {
         .map((e) => Transaction.fromJson(e as Map<String, dynamic>))
         .toList();
   }
-}
+}