feat: FEATURE_CAMERA_ENABLED compile flag für KI-Kamera

- build.gradle.kts: buildConfigField FEATURE_CAMERA_ENABLED (default: true)
- ItemListScreen: Camera-Icon nur wenn Flag gesetzt, onCameraClick optional
- KrisenvorratNavGraph: CameraCapture-Route und Lambda nur wenn Flag gesetzt
- SettingsScreen: KI-Erkennung-Section nur wenn Flag gesetzt

app/build.gradle.kts

@@ -19,6 +19,7 @@ android {
         versionName = "1.2"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        buildConfigField("boolean", "FEATURE_CAMERA_ENABLED", "true")
     }
 
     buildTypes {

app/src/main/java/de/krisenvorrat/app/ui/item/ItemListScreen.kt

@@ -50,7 +50,7 @@ internal fun ItemListScreen(
     onItemClick: (String) -> Unit,
     onCategoriesClick: () -> Unit,
     onLocationsClick: () -> Unit,
-    onCameraClick: () -> Unit,
+    onCameraClick: () -> Unit = {},
     viewModel: ItemListViewModel = hiltViewModel()
 ) {
     val uiState by viewModel.uiState.collectAsStateWithLifecycle()
@@ -61,12 +61,14 @@ internal fun ItemListScreen(
             TopAppBar(
                 title = { Text("Artikel") },
                 actions = {
+                    if (de.krisenvorrat.app.BuildConfig.FEATURE_CAMERA_ENABLED) {
                         IconButton(onClick = onCameraClick) {
                             Icon(
                                 imageVector = Icons.Default.PhotoCamera,
                                 contentDescription = "Foto erfassen"
                             )
                         }
+                    }
                     IconButton(onClick = { isMenuExpanded = true }) {
                         Icon(
                             imageVector = Icons.Default.MoreVert,

app/src/main/java/de/krisenvorrat/app/ui/navigation/KrisenvorratNavGraph.kt

@@ -42,8 +42,10 @@ internal fun KrisenvorratNavGraph(
                 onLocationsClick = {
                     navController.navigate(Screen.LocationManagement)
                 },
-                onCameraClick = {
-                    navController.navigate(Screen.CameraCapture)
+                onCameraClick = if (de.krisenvorrat.app.BuildConfig.FEATURE_CAMERA_ENABLED) {
+                    { navController.navigate(Screen.CameraCapture) }
+                } else {
+                    {}
                 }
             )
         }
@@ -56,6 +58,7 @@ internal fun KrisenvorratNavGraph(
             )
         }
 
+        if (de.krisenvorrat.app.BuildConfig.FEATURE_CAMERA_ENABLED) {
             composable<Screen.CameraCapture> {
                 CameraScreen(
                     onNavigateToItemForm = { prefillJson ->
@@ -64,6 +67,7 @@ internal fun KrisenvorratNavGraph(
                     onNavigateBack = { navController.popBackStack() }
                 )
             }
+        }
 
         composable<Screen.CategoryManagement> {
             CategoryListScreen(

app/src/main/java/de/krisenvorrat/app/ui/settings/SettingsScreen.kt

@@ -316,6 +316,7 @@ internal fun SettingsScreen(
                     )
                 }
 
+                if (de.krisenvorrat.app.BuildConfig.FEATURE_CAMERA_ENABLED) {
                     Spacer(modifier = Modifier.height(32.dp))
 
                     HorizontalDivider()
@@ -348,6 +349,7 @@ internal fun SettingsScreen(
                 }
             }
         }
+    }
 
     if (uiState.pendingImportUri != null) {
         AlertDialog(