Fix redundant fragments in DetailsActivity

app/build.gradle

@@ -97,8 +97,8 @@ dependencies {
 	implementation 'com.squareup.okhttp3:okhttp:4.9.3'
 	implementation 'com.squareup.okio:okio:3.0.0'
 
-	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl:4.3.1'
-	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl-viewbinding:4.3.1'
+	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl:4.3.2'
+	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl-viewbinding:4.3.2'
 
 	implementation 'io.insert-koin:koin-android:3.1.5'
 	implementation 'io.coil-kt:coil-base:1.4.0'

app/src/main/java/org/koitharu/kotatsu/KotatsuApp.kt

@@ -93,6 +93,7 @@ class KotatsuApp : Application() {
 			.detectWrongFragmentContainer()
 			.detectRetainInstanceUsage()
 			.detectSetUserVisibleHint()
+			.detectFragmentTagUsage()
 			.build()
 	}
 }

app/src/main/java/org/koitharu/kotatsu/details/ui/ChaptersFragment.kt

@@ -75,10 +75,7 @@ class ChaptersFragment : BaseFragment<FragmentChaptersBinding>(),
 
 	override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
 		super.onCreateOptionsMenu(menu, inflater)
-		// workaround: duplication after screen rotation
-		if (menu.findItem(R.id.action_reversed) == null) {
-			inflater.inflate(R.menu.opt_chapters, menu)
-		}
+		inflater.inflate(R.menu.opt_chapters, menu)
 	}
 
 	override fun onPrepareOptionsMenu(menu: Menu) {

app/src/main/java/org/koitharu/kotatsu/details/ui/DetailsActivity.kt

@@ -18,6 +18,7 @@ import androidx.core.net.toFile
 import androidx.core.view.isVisible
 import androidx.core.view.updateLayoutParams
 import androidx.core.view.updatePadding
+import androidx.fragment.app.commit
 import androidx.lifecycle.lifecycleScope
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.tabs.TabLayout
@@ -63,6 +64,7 @@ class DetailsActivity : BaseActivity<ActivityDetailsBinding>(), TabLayoutMediato
 			pager.adapter = MangaDetailsAdapter(this)
 			TabLayoutMediator(checkNotNull(binding.tabs), pager, this).attach()
 		}
+		gcFragments()
 		binding.spinnerBranches?.let(::initSpinner)
 
 		viewModel.manga.observe(this, ::onMangaUpdated)
@@ -293,6 +295,23 @@ class DetailsActivity : BaseActivity<ActivityDetailsBinding>(), TabLayoutMediato
 		}
 	}
 
+	private fun gcFragments() {
+		val mustHaveId = binding.pager == null
+		val fm = supportFragmentManager
+		val fragmentsToRemove = fm.fragments.filter { f ->
+			(f.id == 0) == mustHaveId
+		}
+		if (fragmentsToRemove.isEmpty()) {
+			return
+		}
+		fm.commit {
+			setReorderingAllowed(true)
+			for (f in fragmentsToRemove) {
+				remove(f)
+			}
+		}
+	}
+
 	companion object {
 
 		fun newIntent(context: Context, manga: Manga): Intent {