chore: implementiere Auth-Status-abhängige Navigation und Icons, deaktiviere Module ohne Initialisierung und passe NavRail sowie Header für besseren UX an

Signed-off-by: StefanMoCoAt <stefan.mo.co@gmail.com>

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

@@ -8,14 +8,14 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
-import at.mocode.frontend.shell.desktop.navigation.DesktopNavigationPort
-import at.mocode.frontend.shell.desktop.screens.layout.DesktopMainLayout
 import at.mocode.frontend.core.auth.data.local.AuthTokenManager
 import at.mocode.frontend.core.auth.presentation.LoginScreen
 import at.mocode.frontend.core.auth.presentation.LoginViewModel
 import at.mocode.frontend.core.designsystem.theme.AppTheme
 import at.mocode.frontend.core.navigation.AppScreen
 import at.mocode.frontend.features.device.initialization.data.local.DeviceInitializationSettingsManager
+import at.mocode.frontend.shell.desktop.navigation.DesktopNavigationPort
+import at.mocode.frontend.shell.desktop.screens.layout.DesktopMainLayout
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
 
@@ -72,7 +72,7 @@ fun DesktopApp() {
             val returnTo = screen.returnTo ?: AppScreen.VeranstaltungVerwaltung
             nav.navigateToScreen(returnTo)
           },
-          onBack = { /* Desktop hat keine PortalDashboard-Page */ },
+          onBack = { nav.navigateBack() },
         )
 
         else -> {
@@ -85,6 +85,7 @@ fun DesktopApp() {
               authTokenManager.clearToken()
               nav.navigateToScreen(AppScreen.Login(returnTo = AppScreen.VeranstaltungVerwaltung))
             },
+            isAuthenticated = authState.isAuthenticated
           )
         }
       }

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

@@ -5,6 +5,7 @@ import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.automirrored.filled.Login
 import androidx.compose.material.icons.automirrored.filled.Logout
 import androidx.compose.material.icons.filled.*
 import androidx.compose.material3.*
@@ -85,6 +86,7 @@ fun DesktopMainLayout(
   onNavigate: (AppScreen) -> Unit,
   onBack: () -> Unit,
   onLogout: () -> Unit,
+  isAuthenticated: Boolean = false
 ) {
   println("[Navigation] Rendering Screen: ${currentScreen::class.simpleName} (Details: $currentScreen)")
   // DeviceInitialization-Daten (On-the-fly geladen oder Default)
@@ -106,7 +108,8 @@ fun DesktopMainLayout(
     // Navigation Rail (Modernere Seitenleiste)
     DesktopNavRail(
       currentScreen = currentScreen,
-      onNavigate = onNavigate
+      onNavigate = onNavigate,
+      isConfigured = onboardingSettings.isConfigured
     )
 
     Column(modifier = Modifier.fillMaxSize()) {
@@ -115,6 +118,7 @@ fun DesktopMainLayout(
         onNavigate = onNavigate,
         onBack = onBack,
         onLogout = onLogout,
+        isAuthenticated = isAuthenticated
       )
 
       Box(modifier = Modifier.weight(1f).fillMaxWidth()) {
@@ -141,7 +145,8 @@ fun DesktopMainLayout(
 @Composable
 private fun DesktopNavRail(
   currentScreen: AppScreen,
-  onNavigate: (AppScreen) -> Unit
+  onNavigate: (AppScreen) -> Unit,
+  isConfigured: Boolean
 ) {
   Surface(
     modifier = Modifier.fillMaxHeight().width(Dimens.NavRailWidth),
@@ -174,14 +179,16 @@ private fun DesktopNavRail(
         icon = Icons.Default.Dashboard,
         label = "Admin",
         selected = currentScreen is AppScreen.VeranstaltungVerwaltung || currentScreen is AppScreen.VeranstaltungDetail,
-        onClick = { onNavigate(AppScreen.VeranstaltungVerwaltung) }
+        onClick = { onNavigate(AppScreen.VeranstaltungVerwaltung) },
+        enabled = isConfigured
       )
 
       NavRailItem(
         icon = Icons.Default.CloudDownload,
         label = "ZNS-Import",
         selected = currentScreen is AppScreen.StammdatenImport,
-        onClick = { onNavigate(AppScreen.StammdatenImport) }
+        onClick = { onNavigate(AppScreen.StammdatenImport) },
+        enabled = isConfigured
       )
 
       var showStammdatenMenu by remember { mutableStateOf(false) }
@@ -193,11 +200,12 @@ private fun DesktopNavRail(
             currentScreen is AppScreen.Reiter || currentScreen is AppScreen.ReiterVerwaltung ||
             currentScreen is AppScreen.Pferde || currentScreen is AppScreen.PferdVerwaltung ||
             currentScreen is AppScreen.FunktionaerVerwaltung,
-          onClick = { showStammdatenMenu = true }
+          onClick = { showStammdatenMenu = true },
+          enabled = isConfigured
         )
 
         DropdownMenu(
-          expanded = showStammdatenMenu,
+          expanded = showStammdatenMenu && isConfigured,
           onDismissRequest = { showStammdatenMenu = false },
           offset = DpOffset(Dimens.NavRailWidth, 0.dp)
         ) {
@@ -240,14 +248,16 @@ private fun DesktopNavRail(
         icon = Icons.Default.Email,
         label = "Mails",
         selected = currentScreen is AppScreen.NennungsEingang,
-        onClick = { onNavigate(AppScreen.NennungsEingang) }
+        onClick = { onNavigate(AppScreen.NennungsEingang) },
+        enabled = isConfigured
       )
 
       NavRailItem(
         icon = Icons.Default.WifiTethering,
         label = "ConnectivityCheck",
         selected = currentScreen is AppScreen.ConnectivityCheck,
-        onClick = { onNavigate(AppScreen.ConnectivityCheck) }
+        onClick = { onNavigate(AppScreen.ConnectivityCheck) },
+        enabled = true // Immer aktiv zur Diagnose
       )
 
       Spacer(Modifier.weight(1f))
@@ -256,7 +266,8 @@ private fun DesktopNavRail(
         icon = Icons.Default.AppRegistration,
         label = "Setup",
         selected = currentScreen is AppScreen.DeviceInitialization,
-        onClick = { onNavigate(AppScreen.DeviceInitialization) }
+        onClick = { onNavigate(AppScreen.DeviceInitialization) },
+        enabled = true
       )
     }
   }
@@ -268,9 +279,11 @@ private fun NavRailItem(
   icon: ImageVector,
   label: String,
   selected: Boolean,
-  onClick: () -> Unit
+  onClick: () -> Unit,
+  enabled: Boolean = true
 ) {
-  val tint = if (selected) MaterialTheme.colorScheme.primary else AppColors.NavigationContent
+  val contentAlpha = if (enabled) 1.0f else 0.38f
+  val tint = if (selected) MaterialTheme.colorScheme.primary else AppColors.NavigationContent.copy(alpha = contentAlpha)
   val background = if (selected) MaterialTheme.colorScheme.primaryContainer.copy(alpha = 0.5f) else Color.Transparent
 
   TooltipBox(
@@ -287,7 +300,7 @@ private fun NavRailItem(
     Surface(
       modifier = Modifier
         .size(48.dp)
-        .clickable(onClick = onClick),
+        .clickable(enabled = enabled, onClick = onClick),
       shape = MaterialTheme.shapes.medium,
       color = background
     ) {
@@ -315,6 +328,7 @@ private fun DesktopTopHeader(
   onNavigate: (AppScreen) -> Unit,
   onBack: () -> Unit,
   onLogout: () -> Unit,
+  isAuthenticated: Boolean
 ) {
   Surface(
     modifier = Modifier.fillMaxWidth().height(Dimens.TopBarHeight),
@@ -348,18 +362,34 @@ private fun DesktopTopHeader(
         horizontalArrangement = Arrangement.spacedBy(Dimens.SpacingM)
       ) {
         // Profil / Logout Bereich
-        Text(
-          text = "Administrator",
-          style = MaterialTheme.typography.labelMedium,
-          color = MaterialTheme.colorScheme.onSurfaceVariant
-        )
-        IconButton(onClick = onLogout) {
-          Icon(
-            imageVector = Icons.AutoMirrored.Filled.Logout,
-            contentDescription = "Abmelden",
-            modifier = Modifier.size(Dimens.IconSizeM),
-            tint = MaterialTheme.colorScheme.error
+        if (isAuthenticated) {
+          Text(
+            text = "Administrator",
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
           )
+          IconButton(onClick = onLogout) {
+            Icon(
+              imageVector = Icons.AutoMirrored.Filled.Logout,
+              contentDescription = "Abmelden",
+              modifier = Modifier.size(Dimens.IconSizeM),
+              tint = MaterialTheme.colorScheme.error
+            )
+          }
+        } else {
+          Text(
+            text = "Gast",
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+          )
+          IconButton(onClick = { onNavigate(AppScreen.Login(returnTo = currentScreen)) }) {
+            Icon(
+              imageVector = Icons.AutoMirrored.Filled.Login,
+              contentDescription = "Anmelden",
+              modifier = Modifier.size(Dimens.IconSizeM),
+              tint = MaterialTheme.colorScheme.primary
+            )
+          }
         }
       }
     }