NFC-50 Log auth payload parsing errors in handleAuth(); retain navController in WebEidScreen for future use

Author: SanderKondratjevNortal

app/src/main/kotlin/ee/ria/DigiDoc/fragment/screen/WebEidScreen.kt

@@ -29,7 +29,7 @@ import ee.ria.DigiDoc.viewmodel.WebEidViewModel
 @Composable
 fun WebEidScreen(
     modifier: Modifier = Modifier,
-    navController: NavHostController,
+    // navController: NavHostController, // navController is not yet used; reserved for navigation after auth completes
     viewModel: WebEidViewModel,
 ) {
     val auth = viewModel.authPayload.collectAsState().value
@@ -63,7 +63,7 @@ fun WebEidScreen(
 fun WebEidScreenPreview() {
     RIADigiDocTheme {
         WebEidScreen(
-            navController = rememberNavController(),
+            // navController = rememberNavController(),
             viewModel = hiltViewModel(),
         )
     }

app/src/main/kotlin/ee/ria/DigiDoc/viewmodel/WebEidViewModel.kt

@@ -35,6 +35,7 @@ constructor() : ViewModel() {
                 getSigningCertificate = getSigningCertificate
             )
         } catch (e: Exception) {
+            println("Failed to authenticate: ${e.message}")
             _authPayload.value = null
         }
     }