Fix MangaScreen app bar title and nav icon action (#7506)

app/src/main/java/eu/kanade/presentation/manga/MangaScreen.kt

@@ -228,7 +228,7 @@ private fun MangaScreenSmallImpl(
                 backgroundAlphaProvider = { animatedBgAlpha },
                 incognitoMode = state.isIncognitoMode,
                 downloadedOnlyMode = state.isDownloadedOnlyMode,
-                onBackClicked = onBackClicked,
+                onBackClicked = internalOnBackPressed,
                 onShareClicked = onShareClicked,
                 onDownloadClicked = onDownloadActionClicked,
                 onEditCategoryClicked = onEditCategoryClicked,

app/src/main/java/eu/kanade/presentation/manga/components/MangaSmallAppBar.kt

@@ -74,7 +74,7 @@ fun MangaSmallAppBar(
                     text = if (isActionMode) actionModeCounter.toString() else title,
                     maxLines = 1,
                     overflow = TextOverflow.Ellipsis,
-                    modifier = Modifier.alpha(titleAlphaProvider()),
+                    modifier = Modifier.alpha(if (isActionMode) 1f else titleAlphaProvider()),
                 )
             },
             navigationIcon = {