fix: ABS skip library list + nav label overflow + NowPlaying top bar + dominant color bg

- ABS: new AbsBooksScreen loads books directly on tab open; library pills shown only when >1 library — no more two-step library→books navigation
- Nav: shorten "Hörbücher"→"Bücher", "Einstellungen"→"Einst.", reduce label font to 9sp with maxLines=1 to prevent label wrapping
- NowPlaying: increase top padding so the tab bar sits lower on screen (statusBarTop + 16dp, min 52dp)
- NowPlaying: replace blurred-cover background with dominant-color gradient extracted via Palette from cover art; animates on track change; falls back to dark color

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

android/app/build.gradle.kts

@@ -93,6 +93,9 @@ dependencies {
     // Coil
     implementation(libs.coil.compose)
 
+    // Palette (dominant cover color extraction in NowPlaying)
+    implementation("androidx.palette:palette-ktx:1.0.0")
+
     // Google Fonts (Outfit)
     implementation(libs.compose.ui.google.fonts)
 }

android/app/src/main/kotlin/com/novasonic/app/ui/AppNavigation.kt

@@ -30,7 +30,6 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.navigation.*
 import androidx.navigation.compose.*
 import com.novasonic.app.api.AbsClient
-import com.novasonic.app.api.AbsLibrary
 import com.novasonic.app.api.AbsLibraryItem
 import com.novasonic.app.api.model.Song
 import com.novasonic.app.player.AbsPlayerController
@@ -50,8 +49,8 @@ private enum class TopLevel(val route: String, val icon: ImageVector, val label:
     LIBRARY("library",    Icons.Default.LibraryMusic, "Bibliothek"),
     ERKUNDEN("erkunden",  Icons.Default.Explore,      "Erkunden"),
     STARRED("starred",    Icons.Default.Favorite,     "Favoriten"),
-    ABS("abs",            Icons.Default.Book,          "Hörbücher"),
+    ABS("abs",            Icons.Default.Book,          "Bücher"),
-    SETTINGS("settings",  Icons.Default.Settings,     "Einstellungen"),
+    SETTINGS("settings",  Icons.Default.Settings,     "Einst."),
 }
 
 private val NavBg = Color(0xF7080814)
@@ -96,9 +95,8 @@ fun AppNavigation() {
     var playlistPickerSong by remember { mutableStateOf<Song?>(null) }
     var infoSheetSong      by remember { mutableStateOf<Song?>(null) }
     var showNotifications  by remember { mutableStateOf(false) }
-    var selectedAbsLibrary by remember { mutableStateOf<AbsLibrary?>(null) }
+    var selectedAbsItem by remember { mutableStateOf<AbsLibraryItem?>(null) }
-    var selectedAbsItem    by remember { mutableStateOf<AbsLibraryItem?>(null) }
+    var showAbsPlayer   by remember { mutableStateOf(false) }
-    var showAbsPlayer      by remember { mutableStateOf(false) }
 
     val backDispatcher = LocalOnBackPressedDispatcherOwner.current?.onBackPressedDispatcher
     DisposableEffect(showNowPlaying, backDispatcher) {
@@ -125,14 +123,6 @@ fun AppNavigation() {
         backDispatcher.addCallback(cb)
         onDispose { cb.remove() }
     }
-    DisposableEffect(selectedAbsLibrary, backDispatcher) {
-        if (selectedAbsLibrary == null || backDispatcher == null) return@DisposableEffect onDispose {}
-        val cb = object : OnBackPressedCallback(true) {
-            override fun handleOnBackPressed() { selectedAbsLibrary = null }
-        }
-        backDispatcher.addCallback(cb)
-        onDispose { cb.remove() }
-    }
 
     fun coverUrl(coverId: String?) = repo.coverArtUrl(coverId, 600)
     fun heroCoverUrl(coverId: String?) = repo.coverArtUrl(coverId, 1000)
@@ -210,7 +200,7 @@ fun AppNavigation() {
                                         }
                                     },
                                     icon  = { Icon(dest.icon, contentDescription = dest.label) },
-                                    label = { Text(dest.label, style = TextStyle(fontFamily = Outfit, fontWeight = FontWeight.SemiBold, fontSize = 10.sp)) },
+                                    label = { Text(dest.label, style = TextStyle(fontFamily = Outfit, fontWeight = FontWeight.SemiBold, fontSize = 9.sp), maxLines = 1) },
                                     colors = NavigationBarItemDefaults.colors(
                                         selectedIconColor   = NsAccent,
                                         selectedTextColor   = NsAccent,
@@ -288,25 +278,21 @@ fun AppNavigation() {
                 }
                 composable(TopLevel.ABS.route) {
                     val client = absClient
-                    when {
+                    if (client != null) {
-                        client == null -> {}
+                        if (selectedAbsItem != null) {
-                        selectedAbsItem != null -> AbsBookDetailScreen(
+                            AbsBookDetailScreen(
-                            absClient           = client,
+                                absClient           = client,
-                            libraryItem         = selectedAbsItem!!,
+                                libraryItem         = selectedAbsItem!!,
-                            absPlayerController = absPlayerController,
+                                absPlayerController = absPlayerController,
-                            onPlay              = { showAbsPlayer = true },
+                                onPlay              = { showAbsPlayer = true },
-                            onBack              = { selectedAbsItem = null },
+                                onBack              = { selectedAbsItem = null },
-                        )
+                            )
-                        selectedAbsLibrary != null -> AbsLibraryScreen(
+                        } else {
-                            absClient     = client,
+                            AbsBooksScreen(
-                            library       = selectedAbsLibrary!!,
+                                absClient   = client,
-                            onItemClick   = { selectedAbsItem = it },
+                                onItemClick = { selectedAbsItem = it },
-                            onBack        = { selectedAbsLibrary = null },
+                            )
-                        )
+                        }
-                        else -> AbsScreen(
-                            absClient     = client,
-                            onLibraryClick = { selectedAbsLibrary = it },
-                        )
                     }
                 }
                 composable(TopLevel.SETTINGS.route) { SettingsScreen() }

android/app/src/main/kotlin/com/novasonic/app/ui/screen/AbsScreen.kt

@@ -9,11 +9,13 @@ import androidx.compose.animation.slideOutVertically
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.gestures.detectVerticalDragGestures
+import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
@@ -92,6 +94,97 @@ fun AbsScreen(
     }
 }
 
+// ── Combined books screen (skips library list, auto-loads first library) ─────
+
+@Composable
+fun AbsBooksScreen(
+    absClient: AbsClient,
+    onItemClick: (AbsLibraryItem) -> Unit,
+) {
+    var libraries by remember { mutableStateOf<List<AbsLibrary>>(emptyList()) }
+    var selectedLibIdx by remember { mutableIntStateOf(0) }
+    var items by remember { mutableStateOf<List<AbsLibraryItem>>(emptyList()) }
+    var isLoading by remember { mutableStateOf(true) }
+    var error by remember { mutableStateOf<String?>(null) }
+
+    // Initial load: fetch libraries, then immediately load first library's items
+    LaunchedEffect(Unit) {
+        isLoading = true
+        val libs = runCatching { absClient.getLibraries() }.getOrDefault(emptyList())
+        libraries = libs
+        val first = libs.firstOrNull()
+        if (first != null) {
+            val r = runCatching { absClient.getLibraryItems(first.id).results }
+            items = r.getOrDefault(emptyList())
+            error = r.exceptionOrNull()?.message
+        }
+        isLoading = false
+    }
+
+    // Reload when user switches library tab (only after initial load)
+    LaunchedEffect(selectedLibIdx) {
+        val lib = libraries.getOrNull(selectedLibIdx) ?: return@LaunchedEffect
+        isLoading = true
+        error = null
+        val r = runCatching { absClient.getLibraryItems(lib.id).results }
+        items = r.getOrDefault(emptyList())
+        error = r.exceptionOrNull()?.message
+        isLoading = false
+    }
+
+    Column(modifier = Modifier.fillMaxSize().padding(horizontal = 16.dp, vertical = 16.dp)) {
+        Text(
+            "Hörbücher",
+            fontFamily = Outfit, fontWeight = FontWeight.Bold, fontSize = 24.sp, color = NsOnSurface,
+        )
+
+        // Library switcher — only shown when more than one library exists
+        if (libraries.size > 1) {
+            Spacer(Modifier.height(10.dp))
+            Row(
+                modifier = Modifier.horizontalScroll(rememberScrollState()),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                libraries.forEachIndexed { idx, lib ->
+                    val sel = idx == selectedLibIdx
+                    Box(
+                        contentAlignment = Alignment.Center,
+                        modifier = Modifier
+                            .clip(RoundedCornerShape(20.dp))
+                            .background(if (sel) NsAccent else NsSurface)
+                            .clickable { selectedLibIdx = idx }
+                            .padding(horizontal = 14.dp, vertical = 6.dp),
+                    ) {
+                        Text(
+                            lib.name, fontFamily = Outfit, fontWeight = FontWeight.SemiBold,
+                            fontSize = 13.sp, color = if (sel) NsBackground else NsOnSurface2,
+                        )
+                    }
+                }
+            }
+        }
+
+        Spacer(Modifier.height(12.dp))
+
+        when {
+            isLoading -> Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                CircularProgressIndicator(color = NsAccent)
+            }
+            error != null -> Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                Text(error ?: "Fehler", fontFamily = Outfit, color = MaterialTheme.colorScheme.error)
+            }
+            items.isEmpty() -> Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                Text("Keine Bücher gefunden", fontFamily = Outfit, color = NsOnSurface2)
+            }
+            else -> LazyColumn(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                items(items) { item ->
+                    AbsItemRow(item = item, absClient = absClient, onClick = { onItemClick(item) })
+                }
+            }
+        }
+    }
+}
+
 @Composable
 private fun LibraryRow(library: AbsLibrary, onClick: () -> Unit) {
     Row(

android/app/src/main/kotlin/com/novasonic/app/ui/screen/NowPlayingScreen.kt

@@ -33,9 +33,15 @@ import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalDensity
+import android.graphics.drawable.BitmapDrawable
+import androidx.palette.graphics.Palette
+import coil.ImageLoader
 import coil.request.ImageRequest
+import coil.request.SuccessResult
 import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.rememberScrollState
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 import androidx.compose.ui.layout.onSizeChanged
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
@@ -70,7 +76,7 @@ fun NowPlayingScreen(
     var tab by remember { mutableStateOf(NpTab.PLAYER) }
 
     val statusBarTop: Dp = with(LocalDensity.current) { WindowInsets.safeDrawing.getTop(this).toDp() }
-    val topPad = maxOf(statusBarTop, 36.dp)
+    val topPad = maxOf(statusBarTop + 16.dp, 52.dp)
     val navBarBottom: Dp = with(LocalDensity.current) { WindowInsets.safeDrawing.getBottom(this).toDp() }
 
     // Apple Music-style: cover scales up while playing
@@ -83,20 +89,45 @@ fun NowPlayingScreen(
         label = "coverScale",
     )
 
+    // Extract dominant color from cover art for background tinting
     val context = LocalContext.current
+    var dominantColor by remember(coverUrl) { mutableStateOf<Color?>(null) }
+    LaunchedEffect(coverUrl) {
+        dominantColor = null
+        if (coverUrl.isNullOrBlank()) return@LaunchedEffect
+        try {
+            val loader = ImageLoader(context)
+            val req = ImageRequest.Builder(context).data(coverUrl).allowHardware(false).size(80).build()
+            val result = loader.execute(req)
+            if (result is SuccessResult) {
+                val bitmap = (result.drawable as? BitmapDrawable)?.bitmap ?: return@LaunchedEffect
+                val palette = withContext(Dispatchers.Default) { Palette.from(bitmap).generate() }
+                val swatch = palette.darkMutedSwatch ?: palette.mutedSwatch ?: palette.dominantSwatch
+                swatch?.rgb?.let { dominantColor = Color(it) }
+            }
+        } catch (_: Exception) {}
+    }
+
+    val rawBgColor = dominantColor ?: Color(0xFF0D0D1A)
+    val animatedBgColor by animateColorAsState(
+        targetValue = rawBgColor,
+        animationSpec = tween(600),
+        label = "npBg",
+    )
+
     Box(Modifier.fillMaxSize().background(NsBackground)) {
-        // Blurred album art full-screen background — crossfade prevents transparent flash on song change
+        // Dominant-color gradient background
-        AsyncImage(
-            model = ImageRequest.Builder(context).data(coverUrl).crossfade(500).build(),
-            contentDescription = null,
-            contentScale = ContentScale.Crop,
-            modifier = Modifier.fillMaxSize().blur(72.dp),
-        )
         Box(
             Modifier.fillMaxSize().background(
-                Brush.verticalGradient(0f to Color(0xCC000000), 1f to Color(0xF2000000))
+                Brush.verticalGradient(
+                    0f    to animatedBgColor,
+                    0.55f to animatedBgColor.copy(alpha = 0.65f),
+                    1f    to NsBackground,
+                )
             )
         )
+        // Dark scrim for readability
+        Box(Modifier.fillMaxSize().background(Color.Black.copy(alpha = 0.28f)))
 
         Column(
             horizontalAlignment = Alignment.CenterHorizontally,