Tablet UI edge-to-edge tweaks (#8159)

* LibraryScreen: Tweak content padding application to draw under nav bar

* BrowseScreen: Tweak content padding application to draw under nav bar

Side note the tab content doesn't actually use its
scaffold (bottom) contentPadding so it's definitely will
be a headache in the future.

* Don't hardcode bottom nav padding

app/src/main/java/eu/kanade/presentation/browse/ExtensionsScreen.kt

@@ -47,7 +47,6 @@ import eu.kanade.presentation.components.LoadingScreen
 import eu.kanade.presentation.components.SwipeRefreshIndicator
 import eu.kanade.presentation.manga.components.DotSeparatorNoSpaceText
 import eu.kanade.presentation.theme.header
-import eu.kanade.presentation.util.bottomNavPaddingValues
 import eu.kanade.presentation.util.horizontalPadding
 import eu.kanade.presentation.util.plus
 import eu.kanade.presentation.util.secondaryItemAlpha
@@ -58,6 +57,7 @@ import eu.kanade.tachiyomi.extension.model.InstallStep
 import eu.kanade.tachiyomi.ui.browse.extension.ExtensionUiModel
 import eu.kanade.tachiyomi.ui.browse.extension.ExtensionsPresenter
 import eu.kanade.tachiyomi.util.system.LocaleHelper
+import eu.kanade.tachiyomi.widget.TachiyomiBottomNavigationView.Companion.bottomNavPadding
 
 @Composable
 fun ExtensionScreen(
@@ -112,7 +112,7 @@ private fun ExtensionContent(
     var trustState by remember { mutableStateOf<Extension.Untrusted?>(null) }
 
     FastScrollLazyColumn(
-        contentPadding = bottomNavPaddingValues + WindowInsets.navigationBars.asPaddingValues() + topPaddingValues,
+        contentPadding = bottomNavPadding + WindowInsets.navigationBars.asPaddingValues() + topPaddingValues,
     ) {
         items(
             items = state.items,