Here lies "currentTab was used multiple times"

Fixes #282

app/src/main/java/eu/kanade/tachiyomi/ui/browse/BrowseTab.kt

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.ui.browse
 import androidx.compose.animation.graphics.res.animatedVectorResource
 import androidx.compose.animation.graphics.res.rememberAnimatedVectorPainter
 import androidx.compose.animation.graphics.vector.AnimatedImageVector
+import androidx.compose.foundation.pager.rememberPagerState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
@@ -22,12 +23,14 @@ import eu.kanade.tachiyomi.ui.browse.source.globalsearch.GlobalSearchScreen
 import eu.kanade.tachiyomi.ui.browse.source.sourcesTab
 import eu.kanade.tachiyomi.ui.main.MainActivity
 import kotlinx.collections.immutable.persistentListOf
+import kotlinx.coroutines.channels.BufferOverflow
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.receiveAsFlow
 import tachiyomi.i18n.MR
 import tachiyomi.presentation.core.i18n.stringResource
 
-data class BrowseTab(
-    private val toExtensions: Boolean = false,
-) : Tab {
+data object BrowseTab : Tab {
 
     override val options: TabOptions
         @Composable
@@ -45,6 +48,12 @@ data class BrowseTab(
         navigator.push(GlobalSearchScreen())
     }
 
+    private val switchToExtensionTabChannel = Channel<Unit>(1, BufferOverflow.DROP_OLDEST)
+
+    fun showExtension() {
+        switchToExtensionTabChannel.trySend(Unit)
+    }
+
     @Composable
     override fun Content() {
         val context = LocalContext.current
@@ -53,17 +62,25 @@ data class BrowseTab(
         val extensionsScreenModel = rememberScreenModel { ExtensionsScreenModel() }
         val extensionsState by extensionsScreenModel.state.collectAsState()
 
+        val tabs = persistentListOf(
+            sourcesTab(),
+            extensionsTab(extensionsScreenModel),
+            migrateSourceTab(),
+        )
+
+        val state = rememberPagerState { tabs.size }
+
         TabbedScreen(
             titleRes = MR.strings.browse,
-            tabs = persistentListOf(
-                sourcesTab(),
-                extensionsTab(extensionsScreenModel),
-                migrateSourceTab(),
-            ),
-            startIndex = 1.takeIf { toExtensions },
+            tabs = tabs,
+            state = state,
             searchQuery = extensionsState.searchQuery,
             onChangeSearchQuery = extensionsScreenModel::search,
         )
+        LaunchedEffect(Unit) {
+            switchToExtensionTabChannel.receiveAsFlow()
+                .collectLatest { state.scrollToPage(1) }
+        }
 
         LaunchedEffect(Unit) {
             (context as? MainActivity)?.ready = true

app/src/main/java/eu/kanade/tachiyomi/ui/history/HistoryTab.kt

@@ -32,7 +32,7 @@ import tachiyomi.domain.chapter.model.Chapter
 import tachiyomi.i18n.MR
 import tachiyomi.presentation.core.i18n.stringResource
 
-object HistoryTab : Tab {
+data object HistoryTab : Tab {
 
     private val snackbarHostState = SnackbarHostState()
 

app/src/main/java/eu/kanade/tachiyomi/ui/home/HomeScreen.kt

@@ -69,11 +69,11 @@ object HomeScreen : Screen() {
     private const val TAB_FADE_DURATION = 200
     private const val TAB_NAVIGATOR_KEY = "HomeTabs"
 
-    private val tabs = listOf(
+    private val TABS = listOf(
         LibraryTab,
         UpdatesTab,
         HistoryTab,
-        BrowseTab(),
+        BrowseTab,
         MoreTab,
     )
 
@@ -90,7 +90,7 @@ object HomeScreen : Screen() {
                     startBar = {
                         if (isTabletUi()) {
                             NavigationRail {
-                                tabs.fastForEach {
+                                TABS.fastForEach {
                                     NavigationRailItem(it)
                                 }
                             }
@@ -107,7 +107,7 @@ object HomeScreen : Screen() {
                                 exit = shrinkVertically(),
                             ) {
                                 NavigationBar {
-                                    tabs.fastForEach {
+                                    TABS.fastForEach {
                                         NavigationBarItem(it)
                                     }
                                 }
@@ -159,7 +159,12 @@ object HomeScreen : Screen() {
                             is Tab.Library -> LibraryTab
                             Tab.Updates -> UpdatesTab
                             Tab.History -> HistoryTab
-                            is Tab.Browse -> BrowseTab(it.toExtensions)
+                            is Tab.Browse -> {
+                                if (it.toExtensions) {
+                                    BrowseTab.showExtension()
+                                }
+                                BrowseTab
+                            }
                             is Tab.More -> MoreTab
                         }
 

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryTab.kt

@@ -61,7 +61,7 @@ import tachiyomi.presentation.core.screens.EmptyScreenAction
 import tachiyomi.presentation.core.screens.LoadingScreen
 import tachiyomi.source.local.isLocal
 
-object LibraryTab : Tab {
+data object LibraryTab : Tab {
 
     override val options: TabOptions
         @Composable

app/src/main/java/eu/kanade/tachiyomi/ui/more/MoreTab.kt

@@ -38,7 +38,7 @@ import tachiyomi.presentation.core.i18n.stringResource
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 
-object MoreTab : Tab {
+data object MoreTab : Tab {
 
     override val options: TabOptions
         @Composable

app/src/main/java/eu/kanade/tachiyomi/ui/updates/UpdatesTab.kt

@@ -31,7 +31,7 @@ import tachiyomi.core.common.i18n.stringResource
 import tachiyomi.i18n.MR
 import tachiyomi.presentation.core.i18n.stringResource
 
-object UpdatesTab : Tab {
+data object UpdatesTab : Tab {
 
     override val options: TabOptions
         @Composable