feat: load real transaction history in demo app

bdk_demo/lib/features/send/send_page.dart

@@ -2,6 +2,7 @@ import 'dart:math' as math;
 import 'package:bdk_demo/core/router/app_router.dart';
 import 'package:bdk_demo/features/shared/widgets/secondary_app_bar.dart';
 import 'package:bdk_demo/features/shared/widgets/wallet_ui_helpers.dart';
+import 'package:bdk_demo/features/transactions/transactions_controller.dart';
 import 'package:bdk_demo/providers/blockchain_providers.dart';
 import 'package:bdk_demo/providers/connectivity_provider.dart';
 import 'package:bdk_demo/providers/send_providers.dart';
@@ -351,6 +352,7 @@ class _SendPageState extends ConsumerState<SendPage> {
       ref
           .read(balanceSnapshotProvider.notifier)
           .applyFromWallet(wallet, record.id);
+      ref.invalidate(transactionsControllerProvider(record.id));
       _showSnackBar('Transaction broadcast successfully.');
       context.go(AppRoutes.home);
     } catch (_) {

bdk_demo/lib/features/transactions/models/demo_tx_details.dart → bdk_demo/lib/features/transactions/models/transaction_history_item.dart

@@ -1,14 +1,14 @@
 import 'package:bdk_demo/core/utils/formatters.dart';
 
-class DemoTxDetails {
+class TransactionHistoryItem {
   final String txid;
   final int sent;
   final int received;
   final bool pending;
   final int? blockHeight;
   final DateTime? confirmationTime;
 
-  const DemoTxDetails({
+  const TransactionHistoryItem({
     required this.txid,
     required this.sent,
     required this.received,

bdk_demo/lib/features/transactions/transaction_detail_page.dart

@@ -2,9 +2,10 @@ import 'package:bdk_demo/core/theme/app_theme.dart';
 import 'package:bdk_demo/core/utils/formatters.dart';
 import 'package:bdk_demo/features/shared/widgets/secondary_app_bar.dart';
 import 'package:bdk_demo/features/shared/widgets/wallet_ui_helpers.dart';
-import 'package:bdk_demo/features/transactions/models/demo_tx_details.dart';
+import 'package:bdk_demo/features/transactions/models/transaction_history_item.dart';
 import 'package:bdk_demo/features/transactions/transactions_controller.dart';
 import 'package:bdk_demo/models/currency_unit.dart';
+import 'package:bdk_demo/providers/wallet_providers.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
@@ -13,7 +14,7 @@ class TransactionDetailPage extends ConsumerWidget {
 
   const TransactionDetailPage({super.key, required this.txid});
 
-  String _formatAmount(DemoTxDetails transaction) {
+  String _formatAmount(TransactionHistoryItem transaction) {
     final amount = transaction.netAmount;
     final prefix = amount >= 0 ? '+' : '-';
     final value = Formatters.formatBalance(amount.abs(), CurrencyUnit.satoshi);
@@ -28,7 +29,25 @@ class TransactionDetailPage extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final theme = Theme.of(context);
-    final transactionAsync = ref.watch(transactionDetailsProvider(txid));
+    final activeWalletId = ref.watch(activeWalletIdProvider);
+    final hasActiveWallet = ref.watch(hasActiveTransactionWalletProvider);
+    if (!hasActiveWallet) {
+      return const Scaffold(
+        appBar: SecondaryAppBar(title: 'Transaction Detail'),
+        body: SafeArea(
+          child: WalletStateCard(
+            icon: Icons.account_balance_wallet_outlined,
+            title: 'No active wallet',
+            message:
+                'Create or load a wallet before viewing transaction details.',
+            centered: true,
+          ),
+        ),
+      );
+    }
+    final transactionAsync = ref.watch(
+      transactionDetailsProvider((walletId: activeWalletId, txid: txid)),
+    );
 
     return Scaffold(
       appBar: const SecondaryAppBar(title: 'Transaction Detail'),
@@ -37,14 +56,14 @@ class TransactionDetailPage extends ConsumerWidget {
           loading: () => const WalletStateCard(
             icon: Icons.hourglass_bottom,
             title: 'Loading transaction',
-            message: 'Preparing placeholder transaction details...',
+            message: 'Reading wallet transaction details...',
             showSpinner: true,
             centered: true,
           ),
           error: (_, __) => WalletStateCard(
             icon: Icons.error_outline,
             title: 'Transaction unavailable',
-            message: 'The demo could not load placeholder transaction details.',
+            message: 'The wallet transaction details could not be loaded.',
             accentColor: theme.colorScheme.error,
             centered: true,
           ),
@@ -54,7 +73,7 @@ class TransactionDetailPage extends ConsumerWidget {
                 icon: Icons.search_off,
                 title: 'Transaction not found',
                 message:
-                    'No placeholder transaction was found for this txid.\n\n$txid',
+                    'No wallet transaction was found for this txid.\n\n$txid',
                 centered: true,
               );
             }
@@ -81,13 +100,6 @@ class TransactionDetailPage extends ConsumerWidget {
                             WalletStatusChip(status: transaction.statusLabel),
                           ],
                         ),
-                        const SizedBox(height: 8),
-                        Text(
-                          'Standalone transaction detail view for the selected placeholder transaction.',
-                          style: theme.textTheme.bodyMedium?.copyWith(
-                            color: theme.colorScheme.onSurface.withAlpha(170),
-                          ),
-                        ),
                       ],
                     ),
                   ),

bdk_demo/lib/features/transactions/transaction_history_mapper.dart

@@ -0,0 +1,50 @@
+import 'package:bdk_demo/features/transactions/models/transaction_history_item.dart';
+
+sealed class TransactionHistoryPosition {
+  const TransactionHistoryPosition();
+}
+
+class ConfirmedTransactionPosition extends TransactionHistoryPosition {
+  final int blockHeight;
+  final int confirmationTime;
+
+  const ConfirmedTransactionPosition({
+    required this.blockHeight,
+    required this.confirmationTime,
+  });
+}
+
+class UnconfirmedTransactionPosition extends TransactionHistoryPosition {
+  const UnconfirmedTransactionPosition();
+}
+
+class TransactionHistoryMapper {
+  const TransactionHistoryMapper._();
+
+  static TransactionHistoryItem fromWalletData({
+    required String txid,
+    required int sent,
+    required int received,
+    required TransactionHistoryPosition position,
+  }) {
+    return switch (position) {
+      ConfirmedTransactionPosition() => TransactionHistoryItem(
+        txid: txid,
+        sent: sent,
+        received: received,
+        pending: false,
+        blockHeight: position.blockHeight,
+        confirmationTime: DateTime.fromMillisecondsSinceEpoch(
+          position.confirmationTime * 1000,
+          isUtc: true,
+        ),
+      ),
+      UnconfirmedTransactionPosition() => TransactionHistoryItem(
+        txid: txid,
+        sent: sent,
+        received: received,
+        pending: true,
+      ),
+    };
+  }
+}