fix(desktop,cli): match the new interactive auth-callback signature

The relay-auth fix added an `interactive` flag to
RelayAuthenticator.signWithAllLoggedInUsers; update the desktop and cli
implementers (which don't prompt) to the 3-arg lambda.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cli/src/main/kotlin/com/vitorpamplona/amethyst/cli/Context.kt

@@ -258,7 +258,7 @@ class Context(
     private val relayAuth: RelayAuthenticator =
         RelayAuthenticator(
             client = client,
-            signWithAllLoggedInUsers = { _, template ->
+            signWithAllLoggedInUsers = { _, template, _ ->
                 if (signer is NostrSignerInternal) {
                     runCatching { listOf(signer.sign(template)) }.getOrElse { emptyList() }
                 } else {

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/auth/DesktopAuthCoordinator.kt

@@ -105,7 +105,7 @@ class DesktopAuthCoordinator(
                 RelayAuthenticator(
                     client = relayManager.client,
                     scope = scope,
-                    signWithAllLoggedInUsers = { relayUrl, template ->
+                    signWithAllLoggedInUsers = { relayUrl, template, _ ->
                         val signed = signWithPolicy(account, relayUrl, template, policy)
                         signed?.let { listOf(it) } ?: emptyList()
                     },