implement delayed FAB text display in MainVocabularyScreen

app/src/main/java/eu/gaudian/translator/view/vocabulary/MainVocabularyScreen.kt

@@ -75,8 +75,6 @@ enum class VocabularyTab(
     Statistics(title = "label_all_vocabulary", icon = AppIcons.BarChart, route = "statistics")
 }
 
-//Used to avoid the warning of unused variables in strings.xml
-
 @Suppress("unused", "HardCodedStringLiteral", "UnusedVariable")
 @Composable
 fun Dummy() {
@@ -297,7 +295,18 @@ fun MainVocabularyScreen(
         VocabularyTab.entries.find { it.route == currentRoute } ?: VocabularyTab.Dashboard
     }
 
-    val showFabText = selectedTab == VocabularyTab.Dashboard && !isScrolling
+    val rawShowFabText = selectedTab == VocabularyTab.Dashboard && !isScrolling
+    var showFabText by remember { mutableStateOf(rawShowFabText) }
+
+    LaunchedEffect(rawShowFabText) {
+        if (rawShowFabText) {
+            // Only delay when showing (true), hide immediately
+            kotlinx.coroutines.delay(2000)
+            showFabText = true
+        } else {
+            showFabText = false
+        }
+    }
 
     val repoEmpty =
         vocabularyViewModel.vocabularyItems.collectAsState(initial = emptyList()).value.isEmpty()