fix: fiabilité de la soumission du score en fin de partie

sharedUI/src/commonMain/kotlin/com/livrets/App.kt

@@ -20,7 +20,9 @@ import com.livrets.ui.HistoryScreen
 import com.livrets.ui.HomeScreen
 import com.livrets.ui.ResultsScreen
 import com.livrets.ui.SwipeBack
+import kotlinx.coroutines.NonCancellable
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import okio.Path.Companion.toPath
 
 sealed interface Screen {
@@ -63,11 +65,15 @@ fun App(
             config = current.config,
             onFinish = { result ->
                 screen = Screen.Results(result)
-                scope.launch { history.save(result) }
                 scope.launch {
-                    val score = result.leaderboardScore()
+                    withContext(NonCancellable) { history.save(result) }
-                    if (score > 0 && gamesServices.isSignedIn()) {
+                }
-                        gamesServices.submitScore(result.config.leaderboardId(), score)
+                scope.launch {
+                    withContext(NonCancellable) {
+                        val score = result.leaderboardScore()
+                        if (score > 0 && (gamesServices.isSignedIn() || gamesServices.signIn())) {
+                            gamesServices.submitScore(result.config.leaderboardId(), score)
+                        }
                     }
                 }
             },