feat(desktop): add NennungsEingang screen and integrate into navigation

- Introduced `NennungsEingangScreen` for managing online nomination entries.
- Added `NennungsEingang` to `AppScreen` with corresponding route configuration.
- Updated `DesktopMainLayout` to include navigation and UI components for `NennungsEingang`.
- Adjusted `PreviewMain` for screen integration and testing.

frontend/core/navigation/src/commonMain/kotlin/at/mocode/frontend/core/navigation/AppScreen.kt

@@ -65,6 +65,7 @@ sealed class AppScreen(val route: String) {
   data object Meisterschaften : AppScreen("/meisterschaften")
   data object Cups : AppScreen("/cups")
   data object StammdatenImport : AppScreen("/stammdaten/import")
+  data object NennungsEingang : AppScreen("/nennungs-eingang")
 
   companion object {
     private val VERANSTALTUNG_DETAIL = Regex("/veranstaltung/(\\d+)$")
@@ -106,6 +107,7 @@ sealed class AppScreen(val route: String) {
         "/meisterschaften" -> Meisterschaften
         "/cups" -> Cups
         "/stammdaten/import" -> StammdatenImport
+        "/nennungs-eingang" -> NennungsEingang
         else -> {
           BILLING.matchEntire(route)?.destructured?.let { (vId, tId) ->
             return Billing(vId.toLong(), tId.toLong())

frontend/shells/meldestelle-desktop/src/jvmMain/kotlin/at/mocode/desktop/DesktopApp.kt

@@ -48,6 +48,7 @@ fun DesktopApp() {
         && currentScreen !is AppScreen.PferdVerwaltung
         && currentScreen !is AppScreen.VereinVerwaltung
         && currentScreen !is AppScreen.StammdatenImport
+        && currentScreen !is AppScreen.NennungsEingang
       ) {
         LaunchedEffect(Unit) {
           // Standard: Start im Onboarding

frontend/shells/meldestelle-desktop/src/jvmMain/kotlin/at/mocode/desktop/PreviewMain.kt

@@ -5,6 +5,8 @@ import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.window.singleWindowApplication
+import androidx.lifecycle.viewmodel.compose.viewModel
+import at.mocode.desktop.v2.NennungsEingangScreen
 
 /**
  * Hot-Reload Preview Entry Point
@@ -35,6 +37,8 @@ private fun PreviewContent() {
       // --- VEREIN ---
 
 
+
+
       // ── Hier den gewünschten Screen eintragen ──────────────────────
       // VeranstalterAuswahlScreen(onVeranstalterSelected = {}, onNeuerVeranstalter = {})
       // VeranstalterNeuScreen(onBack = {}, onSave = {})

frontend/shells/meldestelle-desktop/src/jvmMain/kotlin/at/mocode/desktop/screens/layout/DesktopMainLayout.kt

@@ -143,6 +143,13 @@ private fun DesktopNavRail(
         onClick = { onNavigate(AppScreen.VereinVerwaltung) }
       )
 
+      NavRailItem(
+        icon = Icons.Default.Email,
+        label = "Mails",
+        selected = currentScreen is AppScreen.NennungsEingang,
+        onClick = { onNavigate(AppScreen.NennungsEingang) }
+      )
+
       NavRailItem(
         icon = Icons.Default.Settings,
         label = "Tools",
@@ -795,6 +802,12 @@ private fun DesktopContentArea(
       )
     }
 
+    is AppScreen.NennungsEingang -> {
+      at.mocode.desktop.v2.NennungsEingangScreen(
+        onBack = onBack
+      )
+    }
+
     // Fallback → Root
     else -> AdminUebersichtScreen(
       onVeranstalterAuswahl = { onNavigate(AppScreen.VeranstalterAuswahl) },

frontend/shells/meldestelle-desktop/src/jvmMain/kotlin/at/mocode/desktop/v2/NennungsEingangScreen.kt

@@ -0,0 +1,123 @@
+package at.mocode.desktop.v2
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.Email
+import androidx.compose.material.icons.filled.Refresh
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+
+data class OnlineNennungMail(
+    val id: String,
+    val sender: String,
+    val empfaenger: String,
+    val datum: String,
+    val turnierNr: String,
+    val reiter: String,
+    val pferd: String,
+    val bewerbe: String,
+    val status: String = "Neu"
+)
+
+@Composable
+fun NennungsEingangScreen(onBack: () -> Unit) {
+    DesktopThemeV2 {
+        var mails by remember { mutableStateOf(getMockMails()) }
+        var isRefreshing by remember { mutableStateOf(false) }
+
+        Column(Modifier.fillMaxSize().padding(16.dp), verticalArrangement = Arrangement.spacedBy(16.dp)) {
+            // Header
+            Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(12.dp)) {
+                IconButton(onClick = onBack) { Icon(Icons.AutoMirrored.Filled.ArrowBack, null) }
+                Icon(Icons.Default.Email, null, modifier = Modifier.size(32.dp), tint = MaterialTheme.colorScheme.primary)
+                Text("Nennungs-Eingang (Online-Nennen)", style = MaterialTheme.typography.headlineMedium)
+                Spacer(Modifier.weight(1f))
+                Button(
+                    onClick = { /* Refresh Logik */ },
+                    enabled = !isRefreshing
+                ) {
+                    Icon(Icons.Default.Refresh, null)
+                    Spacer(Modifier.width(8.dp))
+                    Text("Aktualisieren")
+                }
+            }
+
+            Text(
+                "Hier werden alle eingegangenen Online-Nennungen angezeigt, die über das Web-Formular an meldestelle-[Nr]@mo-code.at gesendet wurden.",
+                style = MaterialTheme.typography.bodyMedium,
+                color = Color.Gray
+            )
+
+            // Tabelle
+            Card(modifier = Modifier.fillMaxWidth().weight(1f)) {
+                Column {
+                    // Header Zeile
+                    Row(
+                        Modifier.fillMaxWidth().background(MaterialTheme.colorScheme.surfaceVariant).padding(12.dp),
+                        verticalAlignment = Alignment.CenterVertically
+                    ) {
+                        Text("Datum", Modifier.width(150.dp), fontWeight = FontWeight.Bold, fontSize = 13.sp)
+                        Text("Turnier", Modifier.width(100.dp), fontWeight = FontWeight.Bold, fontSize = 13.sp)
+                        Text("Reiter", Modifier.width(200.dp), fontWeight = FontWeight.Bold, fontSize = 13.sp)
+                        Text("Pferd", Modifier.width(200.dp), fontWeight = FontWeight.Bold, fontSize = 13.sp)
+                        Text("Bewerbe", Modifier.weight(1f), fontWeight = FontWeight.Bold, fontSize = 13.sp)
+                        Text("Aktion", Modifier.width(150.dp), fontWeight = FontWeight.Bold, fontSize = 13.sp)
+                    }
+                    HorizontalDivider()
+
+                    if (mails.isEmpty()) {
+                        Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                            Text("Keine neuen Nennungen vorhanden.", color = Color.Gray)
+                        }
+                    } else {
+                        LazyColumn(Modifier.fillMaxSize()) {
+                            items(mails) { mail ->
+                                Row(
+                                    Modifier.fillMaxWidth().padding(horizontal = 12.dp, vertical = 8.dp),
+                                    verticalAlignment = Alignment.CenterVertically
+                                ) {
+                                    Text(mail.datum, Modifier.width(150.dp), fontSize = 13.sp)
+                                    Text(mail.turnierNr, Modifier.width(100.dp), fontSize = 13.sp, fontWeight = FontWeight.SemiBold)
+                                    Text(mail.reiter, Modifier.width(200.dp), fontSize = 13.sp)
+                                    Text(mail.pferd, Modifier.width(200.dp), fontSize = 13.sp)
+                                    Text(mail.bewerbe, Modifier.weight(1f), fontSize = 13.sp)
+
+                                    Row(Modifier.width(150.dp), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                                        Button(
+                                            onClick = { /* Übernahme Logik */ },
+                                            contentPadding = PaddingValues(horizontal = 12.dp, vertical = 4.dp),
+                                            modifier = Modifier.height(32.dp),
+                                            colors = ButtonDefaults.buttonColors(containerColor = MaterialTheme.colorScheme.secondary)
+                                        ) {
+                                            Icon(Icons.Default.Check, null, modifier = Modifier.size(14.dp))
+                                            Spacer(Modifier.width(4.dp))
+                                            Text("Übernehmen", fontSize = 11.sp)
+                                        }
+                                    }
+                                }
+                                HorizontalDivider(Modifier.padding(horizontal = 8.dp), thickness = 0.5.dp)
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+private fun getMockMails() = listOf(
+    OnlineNennungMail("1", "max.mustermann@web.de", "meldestelle-26128@mo-code.at", "14.04.2026 14:30", "26128", "Max Mustermann", "Spirit", "1, 2, 5"),
+    OnlineNennungMail("2", "susi.sorglos@gmx.at", "meldestelle-26128@mo-code.at", "14.04.2026 15:12", "26128", "Susi Sorglos", "Flocke", "10, 11"),
+    OnlineNennungMail("3", "info@reitstall-hofer.at", "meldestelle-26129@mo-code.at", "14.04.2026 16:05", "26129", "Georg Hofer", "Black Beauty", "3, 4, 8")
+)

frontend/shells/meldestelle-web/build.gradle.kts

@@ -22,12 +22,12 @@ kotlin {
   }
 
   wasmJs {
-    binaries.library()
     browser {
       testTask {
         enabled = false
       }
     }
+    binaries.executable()
   }
 
   sourceSets {

frontend/shells/meldestelle-web/src/wasmJsMain/kotlin/at/mocode/web/WebMainScreen.kt

@@ -15,7 +15,6 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import at.mocode.frontend.core.designsystem.theme.AppColors
 import at.mocode.frontend.features.billing.presentation.BillingViewModel
-import at.mocode.frontend.features.nennung.presentation.web.NennungPayload
 import at.mocode.frontend.features.nennung.presentation.web.OnlineNennungFormular
 import org.koin.compose.viewmodel.koinViewModel