feat: add kyoto retry (option 1)

BDKSwiftExampleWallet/View Model/WalletViewModel.swift

@@ -270,4 +270,13 @@ class WalletViewModel {
             await startSyncWithProgress()
         }
     }
+
+    /// Retry sync pipeline for Kyoto when a prior attempt failed.
+    func retryKyotoSync() async {
+        guard isKyotoClient else { return }
+        await syncOrFullScan()
+        getBalance()
+        getTransactions()
+        await getPrices()
+    }
 }

BDKSwiftExampleWallet/View/Home/ActivityHomeHeaderView.swift

@@ -18,6 +18,9 @@ struct ActivityHomeHeaderView: View {
     let isKyotoConnected: Bool
     let currentBlockHeight: UInt32
 
+    /// Optional retry action used for Kyoto errors.
+    let retryKyotoSync: (() -> Void)?
+
     let showAllTransactions: () -> Void
 
     var body: some View {
@@ -116,6 +119,13 @@ struct ActivityHomeHeaderView: View {
                     }
                 }
                 .contentTransition(.symbolEffect(.replace.offUp))
+                .contentShape(Rectangle())  // Expand tap target for retry on error
+                .onTapGesture {
+                    guard isKyotoClient else { return }
+                    if case .error = walletSyncState {
+                        retryKyotoSync?()
+                    }
+                }
 
             }
             .foregroundStyle(.secondary)

BDKSwiftExampleWallet/View/WalletView.swift

@@ -54,7 +54,12 @@ struct WalletView: View {
                             needsFullScan: viewModel.needsFullScan,
                             isKyotoClient: viewModel.isKyotoClient,
                             isKyotoConnected: viewModel.isKyotoConnected,
-                            currentBlockHeight: viewModel.currentBlockHeight
+                            currentBlockHeight: viewModel.currentBlockHeight,
+                            retryKyotoSync: {
+                                Task {
+                                    await viewModel.retryKyotoSync()
+                                }
+                            }
                         ) {
                             showAllTransactions = true
                         }