fix(desktop): adapt wallet screen to upstream AccountManager API changes

clearNwcConnection and setNwcConnection now require npub param and are
suspend functions. ConnectWalletDialog validates URI prefix inline
before firing the async connect callback.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/ui/wallet/WalletColumnScreen.kt

@@ -200,9 +200,11 @@ fun WalletColumnScreen(
                     )
 
                     TextButton(onClick = {
-                        accountManager.clearNwcConnection()
-                        balanceSats = null
-                        scope.launch { snackbarHostState.showSnackbar("Wallet disconnected") }
+                        scope.launch {
+                            accountManager.clearNwcConnection(account.npub)
+                            balanceSats = null
+                            snackbarHostState.showSnackbar("Wallet disconnected")
+                        }
                     }) {
                         Text("Disconnect", color = MaterialTheme.colorScheme.error)
                     }
@@ -222,12 +224,13 @@ fun WalletColumnScreen(
         ConnectWalletDialog(
             onDismiss = { showConnectDialog = false },
             onConnect = { uri ->
-                val result = accountManager.setNwcConnection(uri)
-                if (result.isSuccess) {
-                    showConnectDialog = false
-                    scope.launch { snackbarHostState.showSnackbar("Wallet connected!") }
+                scope.launch {
+                    val result = accountManager.setNwcConnection(account.npub, uri)
+                    if (result.isSuccess) {
+                        showConnectDialog = false
+                        snackbarHostState.showSnackbar("Wallet connected!")
+                    }
                 }
-                result.isSuccess
             },
         )
     }
@@ -378,7 +381,7 @@ private fun WalletBalanceCard(
 @Composable
 private fun ConnectWalletDialog(
     onDismiss: () -> Unit,
-    onConnect: (String) -> Boolean,
+    onConnect: (String) -> Unit,
 ) {
     var nwcUri by remember { mutableStateOf("") }
     var error by remember { mutableStateOf<String?>(null) }
@@ -429,7 +432,10 @@ private fun ConnectWalletDialog(
         confirmButton = {
             Button(
                 onClick = {
-                    if (!onConnect(nwcUri)) {
+                    val trimmed = nwcUri.trim()
+                    if (trimmed.startsWith("nostr+walletconnect://")) {
+                        onConnect(trimmed)
+                    } else {
                         error = "Invalid NWC URI. Expected: nostr+walletconnect://..."
                     }
                 },