android/app/src/main/java/com/fabledsword/minstrel/library/ui/LibraryScreen.kt

@@ -4,7 +4,6 @@ package com.fabledsword.minstrel.library.ui
 
 import androidx.compose.animation.Crossfade
 import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.fillMaxSize
@@ -12,6 +11,8 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.grid.GridCells
 import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
 import androidx.compose.foundation.lazy.grid.items
+import androidx.compose.foundation.pager.HorizontalPager
+import androidx.compose.foundation.pager.rememberPagerState
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -22,11 +23,10 @@ import androidx.compose.material3.Tab
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableIntStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.launch
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.navigation.NavHostController
@@ -69,8 +69,12 @@ fun LibraryScreen(
     navController: NavHostController,
     viewModel: LibraryViewModel = hiltViewModel(),
 ) {
-    var selectedTab by remember { mutableIntStateOf(0) }
     val tabs = LIBRARY_TABS
+    // HorizontalPager owns the active-tab state — the TabRow reads
+    // pagerState.currentPage and animateScrollToPage drives it on tap,
+    // so swipe and tap stay in sync.
+    val pagerState = rememberPagerState(pageCount = { tabs.size })
+    val scope = rememberCoroutineScope()
 
     Scaffold(
         modifier = Modifier.fillMaxSize(),
@@ -91,13 +95,13 @@ fun LibraryScreen(
                     },
                 )
                 PrimaryScrollableTabRow(
-                    selectedTabIndex = selectedTab,
+                    selectedTabIndex = pagerState.currentPage,
                     edgePadding = 16.dp,
                 ) {
                     tabs.forEachIndexed { index, label ->
                         Tab(
-                            selected = selectedTab == index,
-                            onClick = { selectedTab = index },
+                            selected = pagerState.currentPage == index,
+                            onClick = { scope.launch { pagerState.animateScrollToPage(index) } },
                             text = { Text(label) },
                         )
                     }
@@ -105,8 +109,11 @@ fun LibraryScreen(
             }
         },
     ) { inner ->
-        Box(modifier = Modifier.fillMaxSize().padding(inner)) {
-            when (selectedTab) {
+        HorizontalPager(
+            state = pagerState,
+            modifier = Modifier.fillMaxSize().padding(inner),
+        ) { page ->
+            when (page) {
                 TAB_ARTISTS -> ArtistsTab(viewModel = viewModel, navController = navController)
                 TAB_ALBUMS -> AlbumsTab(viewModel = viewModel, navController = navController)
                 TAB_HISTORY -> HistoryTab(