Open the new artifact after adding it

On a successful add-artifact, navigate to the artifact detail for the newly
created artifact instead of the implementation-pending screen. The ViewModel
now passes the created artifact's id (the returned inner event's id) to
onSuccess, and the screen opens ArtifactDetailRoute via the pop-inclusive
callback so the add form leaves the back stack.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

composeApp/src/commonMain/kotlin/press/mantra/compose/ui/composable/AddArtifactScreen.kt

@@ -60,6 +60,7 @@ import press.mantra.compose.ui.theme.TorchTheme
 import press.mantra.compose.ui.view.state.ChatRoomMessagingUIState
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import press.mantra.compose.repository.MantraRepository
+import press.mantra.compose.ui.composable.navigation.routes.ArtifactDetailRoute
 import press.mantra.compose.ui.composable.navigation.routes.ImplementationPendingRoute
 import press.mantra.compose.ui.view.model.AddArtifactViewModel
 import press.mantra.compose.ui.view.state.AddArtifactUIState
@@ -141,9 +142,16 @@ fun AddArtifactScreen(
                                         dialectNameField = dialectNameFieldState,
                                         dialectCountryField = dialectCountryFieldState,
                                         dialectLanguageField = dialectLanguageFieldState,
-                                        onSuccess = {
-                                            onNavigateToRoute.invoke(
-                                                ImplementationPendingRoute("Add Artifact")
+                                        onSuccess = { artifactId ->
+                                            // Open the newly created artifact, removing this
+                                            // add screen from the back stack.
+                                            onNavigateToRouteAndPopUpInclusive.invoke(
+                                                ArtifactDetailRoute(
+                                                    activeUserPublicKey = activeUserPublicKey,
+                                                    artifactId = artifactId,
+                                                    chatRoomId = chatRoomId,
+                                                    relayHint = relayHint
+                                                )
                                             )
                                         },
                                         onFailure = {

composeApp/src/commonMain/kotlin/press/mantra/compose/ui/view/model/AddArtifactViewModel.kt

@@ -69,7 +69,7 @@ class AddArtifactViewModel(
         dialectLanguageField: TextFieldState,
         visibility: String = MantraRepository.DEFAULT_VISIBILITY,
         license: String = MantraRepository.DEFAULT_LICENSE,
-        onSuccess: () -> Unit,
+        onSuccess: (artifactId: String) -> Unit,
         onFailure: () -> Unit
     ) {
         val name = nameField.text.toString()
@@ -130,7 +130,8 @@ class AddArtifactViewModel(
                 dialectNameField.clearText()
                 dialectCountryField.clearText()
                 dialectLanguageField.clearText()
-                onSuccess.invoke()
+                // The created artifact's id is the returned inner event's id.
+                onSuccess.invoke(marmotInnerEvent.id)
             } else {
                 onFailure.invoke()
             }