Fix library dropdown arrow showing for a split second for those with 0 categories

But please use categories anyway

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

@@ -783,6 +783,7 @@ class LibraryController(
             LibraryUpdateService.setListener(this)
             binding.recyclerCover.isClickable = false
             binding.recyclerCover.isFocusable = false
+            singleCategory = presenter.categories.size <= 1
             showDropdown()
         } else {
             updateFilterSheetY()

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

@@ -100,6 +100,9 @@ class LibraryPresenter(
 
     /** Get favorited manga for library and sort and filter it */
     fun getLibrary() {
+        if (categories.isEmpty()) {
+            categories = lastCategories ?: db.getCategories().executeAsBlocking().toMutableList()
+        }
         scope.launch {
             val library = withContext(Dispatchers.IO) { getLibraryFromDB() }
             library.apply {