Remove top app bar scroll behavior

This lets us make it more consistent with the Compose screens for now. Maybe it'll return in the future.

This also includes making the AboutController a full Compose controller with a new abstracted TopAppBar composable.

(cherry picked from commit 80c7a45328)

# Conflicts:
#	app/src/main/java/eu/kanade/presentation/category/components/CategoryTopAppBar.kt
#	app/src/main/java/eu/kanade/presentation/more/about/AboutScreen.kt

app/src/main/java/exh/pagepreview/components/PagePreviewScreen.kt

@@ -8,18 +8,13 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ArrowBack
 import androidx.compose.material.icons.filled.UTurnRight
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.Slider
-import androidx.compose.material3.SmallTopAppBar
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
-import androidx.compose.material3.TopAppBarDefaults
-import androidx.compose.material3.TopAppBarScrollBehavior
-import androidx.compose.material3.rememberTopAppBarScrollState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.SideEffect
 import androidx.compose.runtime.derivedStateOf
@@ -30,7 +25,6 @@ import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import eu.kanade.presentation.components.AroundLayout
@@ -38,6 +32,7 @@ import eu.kanade.presentation.components.EmptyScreen
 import eu.kanade.presentation.components.LoadingScreen
 import eu.kanade.presentation.components.Scaffold
 import eu.kanade.presentation.components.ScrollbarLazyColumn
+import eu.kanade.presentation.components.TopAppBar
 import eu.kanade.presentation.manga.components.PagePreview
 import eu.kanade.presentation.util.plus
 import eu.kanade.presentation.util.topPaddingValues
@@ -57,18 +52,13 @@ fun PagePreviewScreen(
     onDismissPageDialog: () -> Unit,
     navigateUp: () -> Unit,
 ) {
-    val topAppBarScrollState = rememberTopAppBarScrollState()
-    val topAppBarScrollBehavior = TopAppBarDefaults.enterAlwaysScrollBehavior(topAppBarScrollState)
-
     Scaffold(
         modifier = Modifier
-            .statusBarsPadding()
-            .nestedScroll(topAppBarScrollBehavior.nestedScrollConnection),
+            .statusBarsPadding(),
         topBar = {
             PagePreviewTopAppBar(
-                topAppBarScrollBehavior = topAppBarScrollBehavior,
                 navigateUp = navigateUp,
-                title = stringResource(id = R.string.page_previews),
+                title = stringResource(R.string.page_previews),
                 onOpenPageDialog = onOpenPageDialog,
                 showOpenPageDialog = state is PagePreviewState.Success &&
                     (state.pageCount != null && state.pageCount > 1 /* TODO support unknown pageCount || state.hasNextPage*/),
@@ -176,25 +166,13 @@ fun PagePreviewPageDialog(
 
 @Composable
 fun PagePreviewTopAppBar(
-    topAppBarScrollBehavior: TopAppBarScrollBehavior,
     navigateUp: () -> Unit,
     title: String,
     onOpenPageDialog: () -> Unit,
     showOpenPageDialog: Boolean,
 ) {
-    SmallTopAppBar(
-        navigationIcon = {
-            IconButton(onClick = navigateUp) {
-                Icon(
-                    imageVector = Icons.Default.ArrowBack,
-                    contentDescription = stringResource(R.string.abc_action_bar_up_description),
-                )
-            }
-        },
-        title = {
-            Text(text = title)
-        },
-        scrollBehavior = topAppBarScrollBehavior,
+    TopAppBar(
+        title = title,
         actions = {
             if (showOpenPageDialog) {
                 IconButton(onClick = onOpenPageDialog) {
@@ -205,5 +183,6 @@ fun PagePreviewTopAppBar(
                 }
             }
         },
+        navigateUp = navigateUp,
     )
 }