refactor VocabularyMenu and FAB components to support dynamic text visibility based on scroll state and update Zipf frequency UI in VocabularyCard

app/src/main/java/eu/gaudian/translator/utils/ApiRequestTemplates.kt

@@ -109,10 +109,19 @@ class ExampleSentenceRequest(
     override val requiredFields = listOf("word", "sourceSentence", "targetSentence")
 
     init {
-        promptBuilder.basePrompt = "Provide one short, simple and clear example sentence for the word '$word' in $languageFirst and fully translate the sentence to $languageSecond, using $wordTranslation as a translation."
-        addDetail("Structure: { 'word': string, 'sourceSentence': string, 'targetSentence': string }.")
-        addDetail("Only include the fields above. Keep sentences concise and clear. Do not include any explanations or additional text.")
-        withJsonResponse("a JSON object with 'word' (the original word), 'sourceSentence' (the example sentence in the source language), and 'targetSentence' (the translation in the target language). Ensure all values are properly quoted strings.")
+        promptBuilder.basePrompt = """
+        Task: Create a short, concise natural example sentence in $languageFirst for the word '$word'.
+        
+        Rules:
+        1. The 'sourceSentence' must be entirely in $languageFirst. 
+        2. Do NOT use the word '$wordTranslation' in the 'sourceSentence'.
+        3. The 'targetSentence' must be the $languageSecond translation of the 'sourceSentence'.
+        4. In the 'targetSentence', use the word '$wordTranslation'.
+    """.trimIndent()
+
+        addDetail("Constraint: Ensure 'sourceSentence' contains ONLY $languageFirst and 'targetSentence' contains ONLY $languageSecond.")
+        addDetail("Structure: { 'word': '$word', 'sourceSentence': string, 'targetSentence': string }.")
+        withJsonResponse("a JSON object. Ensure no mixed-language sentences occur.")
     }
 }
 

app/src/main/java/eu/gaudian/translator/utils/dictionary/DictionaryService.kt

@@ -90,14 +90,14 @@ class DictionaryService(context: Context) {
     @OptIn(ExperimentalTime::class)
     suspend fun searchDefinition(query: String, language: Language): Result<DictionaryEntry> = withContext(Dispatchers.IO) {
         try {
-            Log.i("DictionaryService", "Searching definition for word: $query in language: ${language.name}")
+            Log.i("DictionaryService", "Searching definition for word: $query in language: ${language.englishName}")
             
             val requestedParts = getActivatedDictionaryOptions()
             Log.d("DictionaryService", "Requested dictionary parts: $requestedParts")
 
             val template = DictionaryDefinitionRequest(
                 word = query,
-                language = language.name,
+                language = language.englishName,
                 requestedParts = requestedParts
             )
             
@@ -110,7 +110,7 @@ class DictionaryService(context: Context) {
                     word = apiResponse.word,
                     definition = apiResponse.parts,
                     languageCode = language.nameResId,
-                    languageName = language.name,
+                    languageName = language.englishName,
                     createdAt = Clock.System.now()
                 )
             }.onFailure { exception ->
@@ -127,13 +127,13 @@ class DictionaryService(context: Context) {
      */
     suspend fun getExampleSentence(word: String, wordTranslation: String, languageFirst: Language, languageSecond: Language): Result<Pair<String, String>> = withContext(Dispatchers.IO) {
         try {
-            Log.i("DictionaryService", "Getting example sentence for word: $word (${languageFirst.name} -> ${languageSecond.name})")
+            Log.i("DictionaryService", "Getting example sentence for word: $word (${languageFirst.englishName} -> ${languageSecond.englishName})")
             
             val template = ExampleSentenceRequest(
                 word = word,
                 wordTranslation = wordTranslation,
-                languageFirst = languageFirst.name,
-                languageSecond = languageSecond.name
+                languageFirst = languageFirst.englishName,
+                languageSecond = languageSecond.englishName
             )
             
             val result = apiRequestHandler.executeRequest(template)
@@ -179,7 +179,7 @@ class DictionaryService(context: Context) {
                 }
             }
 
-            Log.i("DictionaryService", "Generating new word of the day for: $todayString in language: ${language.name}")
+            Log.i("DictionaryService", "Generating new word of the day for: $todayString in language: ${language.englishName}")
 
             val topics = listOf(
                 "science", "literature", "history", "technology", "nature",
@@ -192,7 +192,7 @@ class DictionaryService(context: Context) {
             Log.d("DictionaryService", "Selected topic for word of the day: $randomTopic")
 
             val template = WordOfTheDayRequest(
-                language = language.name,
+                language = language.englishName,
                 category = randomTopic
             )
 
@@ -205,7 +205,7 @@ class DictionaryService(context: Context) {
                         word = apiResponse.word,
                         definition = apiResponse.parts,
                         languageCode = language.nameResId,
-                        languageName = language.name,
+                        languageName = language.englishName,
                         createdAt = today
                     )
                     dictionaryRepository.saveWordOfTheDay(newEntry)
@@ -225,7 +225,7 @@ class DictionaryService(context: Context) {
 
     suspend fun getEtymology(query: String, language: Language): Result<EtymologyData> = withContext(Dispatchers.IO) {
         try {
-            Log.i("DictionaryService", "Getting etymology for word: $query in language: ${language.name}")
+            Log.i("DictionaryService", "Getting etymology for word: $query in language: ${language.englishName}")
             
             val template = EtymologyRequest(
                 word = query,

app/src/main/java/eu/gaudian/translator/view/composable/AppFabMenu.kt

@@ -1,6 +1,7 @@
 package eu.gaudian.translator.view.composable
 
 import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.animateContentSize
 import androidx.compose.animation.core.Spring
 import androidx.compose.animation.core.animateFloatAsState
 import androidx.compose.animation.core.spring
@@ -55,7 +56,8 @@ data class FabMenuItem(
 fun AppFabMenu(
     items: List<FabMenuItem>,
     modifier: Modifier = Modifier,
-    title: String? = null
+    title: String? = null,
+    showFabText: Boolean = true
 ) {
     var isMenuExpanded by remember { mutableStateOf(false) }
 
@@ -111,14 +113,16 @@ fun AppFabMenu(
             Row(
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.spacedBy(8.dp),
-                modifier = Modifier.padding(horizontal = 16.dp)
+                modifier = Modifier
+                    .padding(horizontal = 16.dp)
+                    .animateContentSize()
             ) {
                 Icon(
                     imageVector = AppIcons.Add,
                     contentDescription = stringResource(R.string.cd_toggle_menu),
                     modifier = Modifier.rotate(iconRotationAngle)
                 )
-                if (title != null) {
+                if (title != null && showFabText) {
                     Text(
                         text = title,
                         style = MaterialTheme.typography.labelLarge

app/src/main/java/eu/gaudian/translator/view/dialogs/VocabularyMenu.kt

@@ -22,6 +22,7 @@ import eu.gaudian.translator.viewmodel.VocabularyViewModel
 @Composable
 fun VocabularyMenu(
     modifier: Modifier = Modifier,
+    showFabText : Boolean = true
 ) {
     val activity = LocalContext.current.findActivity()
     val languageViewModel: LanguageViewModel = hiltViewModel(viewModelStoreOwner = activity)
@@ -48,7 +49,7 @@ fun VocabularyMenu(
         )
     )
 
-    AppFabMenu(items = menuItems, modifier = modifier, title = stringResource(R.string.label_add_vocabulary))
+    AppFabMenu(items = menuItems, modifier = modifier, title = stringResource(R.string.label_add_vocabulary), showFabText = showFabText)
 
     if (showAddVocabularyDialog) {
         AddVocabularyDialog(

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

@@ -88,6 +88,7 @@ fun DashboardContent(
     onNavigateToCategoryDetail: (Int) -> Unit,
     onNavigateToCategoryList: () -> Unit,
     onShowWordPairExerciseDialog: () -> Unit,
+    onScroll: (Boolean) -> Unit = {},
 ) {
     val activity = LocalContext.current.findActivity()
     val languageViewModel: LanguageViewModel = hiltViewModel(viewModelStoreOwner = activity)
@@ -167,6 +168,11 @@ fun DashboardContent(
                     lazyListState.firstVisibleItemScrollOffset
                 )
             }
+
+            // Detect scroll and notify parent
+            LaunchedEffect(lazyListState.isScrollInProgress) {
+                onScroll(lazyListState.isScrollInProgress)
+            }
             DisposableEffect(Unit) {
                 onDispose {
                     settingsViewModel.saveDashboardScrollState(

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

@@ -4,6 +4,7 @@ package eu.gaudian.translator.view.vocabulary
 
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.LocalActivity
+import androidx.compose.animation.animateContentSize
 import androidx.compose.animation.core.animateDpAsState
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -112,6 +113,9 @@ fun MainVocabularyScreen(
     var wpTrainingMode by remember { mutableStateOf(false) }
     var wpDueTodayOnly by remember { mutableStateOf(false) }
 
+    var isScrolling by remember { mutableStateOf(false) }
+
+
     if (showCustomExerciseDialog) {
         StartExerciseDialog(
             onDismiss = { showCustomExerciseDialog = false },
@@ -293,6 +297,8 @@ fun MainVocabularyScreen(
         VocabularyTab.entries.find { it.route == currentRoute } ?: VocabularyTab.Dashboard
     }
 
+    val showFabText = selectedTab == VocabularyTab.Dashboard && !isScrolling
+
     val repoEmpty =
         vocabularyViewModel.vocabularyItems.collectAsState(initial = emptyList()).value.isEmpty()
 
@@ -333,7 +339,8 @@ fun MainVocabularyScreen(
                         onNavigateToCategoryList = {
                             navController.navigate("category_list_screen")
                         },
-                        onShowWordPairExerciseDialog = { showWordPairExerciseDialog = true }
+                        onShowWordPairExerciseDialog = { showWordPairExerciseDialog = true },
+                        onScroll = { isScrolling = it }
                      )
                  }
                  composable(VocabularyTab.Statistics.route) {
@@ -390,7 +397,7 @@ fun MainVocabularyScreen(
                 .padding(16.dp),
             horizontalAlignment = Alignment.End
         ) {
-            VocabularyMenu(modifier = Modifier.onSizeChanged { menuHeightPx = it.height })
+            VocabularyMenu(modifier = Modifier.onSizeChanged { menuHeightPx = it.height }, showFabText = showFabText)
         }
 
         // Place the FAB separately and animate its bottom padding based on the menu height
@@ -405,16 +412,19 @@ fun MainVocabularyScreen(
             Row(
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.spacedBy(8.dp),
-                modifier = Modifier.padding(horizontal = 16.dp)
+                modifier = Modifier
+                    .padding(horizontal = 16.dp)
+                    .animateContentSize()
             ) {
                 Icon(
                     imageVector = AppIcons.Quiz,
                     contentDescription = null
                 )
+                if(showFabText) {
                 Text(
                     text = stringResource(R.string.label_start_exercise),
                     style = MaterialTheme.typography.labelLarge
-                )
+                )}
             }
         }
     }

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

@@ -10,11 +10,14 @@ import androidx.compose.foundation.layout.IntrinsicSize
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.wrapContentHeight
 import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Card
@@ -23,6 +26,7 @@ import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
+import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.OutlinedCard
@@ -41,7 +45,9 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.blur
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.StrokeCap
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
@@ -52,6 +58,7 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.zIndex
 import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import androidx.navigation.NavController
 import eu.gaudian.translator.R
@@ -294,9 +301,17 @@ fun VocabularyCard(
                         }
                     )
 
+                    Box(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .height(0.dp) // Take 0 structural space
+                            .wrapContentHeight(unbounded = true) // Allow children to render at their full size
+                            .zIndex(1f), // Ensure it draws over the bottom CardFace
+                        contentAlignment = Alignment.Center
+                    ) {
                         Row(
                             verticalAlignment = Alignment.CenterVertically,
-                        modifier = Modifier.padding(horizontal = 4.dp)
+                            modifier = Modifier.fillMaxWidth()
                         ) {
                             HorizontalDivider(
                                 modifier = Modifier.weight(1f),
@@ -312,6 +327,7 @@ fun VocabularyCard(
                                 }
                             }
                         }
+                    }
 
                     CardFace(
                         modifier = backFaceModifier,
@@ -442,28 +458,52 @@ private fun FrequencyPill(zipfFrequency: Float?) {
     if (zipfFrequency == null) return
 
     val semanticColors = MaterialTheme.semanticColors
+
+    // Determine the label and color based on the Zipf value
     val (label, color) = when {
-        zipfFrequency <= 3f -> Pair(stringResource(R.string.text_rare), semanticColors.wrongContainer)
-        zipfFrequency <= 4f -> Pair(stringResource(R.string.text_infrequent), semanticColors.stageGradient2)
-        zipfFrequency <= 4.5f -> Pair(stringResource(R.string.text_uncommon), semanticColors.stageGradient3)
+        zipfFrequency <= 2.0f -> Pair(stringResource(R.string.text_rare), semanticColors.wrongContainer)
+        zipfFrequency <= 3.0f -> Pair(stringResource(R.string.text_infrequent), semanticColors.stageGradient2)
+        zipfFrequency <= 4.0f -> Pair(stringResource(R.string.text_uncommon), semanticColors.stageGradient3)
         zipfFrequency <= 5.5f -> Pair(stringResource(R.string.text_common), semanticColors.stageGradient4)
-        zipfFrequency <= 6.5f -> Pair(stringResource(R.string.text_frequent), semanticColors.stageGradient5)
-        zipfFrequency <= 7.5f -> Pair(stringResource(R.string.text_very_frequent), semanticColors.stageGradient6)
+        zipfFrequency <= 6.0f -> Pair(stringResource(R.string.text_frequent), semanticColors.stageGradient5)
         else -> Pair(stringResource(R.string.text_very_frequent), semanticColors.successContainer)
     }
 
+    // Normalize progress: Zipf 1.0 to 8.0 mapped to 0f to 1f
+    val progress = ((zipfFrequency - 1f) / (8f - 1f)).coerceIn(0f, 1f)
+
+    Column(
+        modifier = Modifier
+            .padding(horizontal = 4.dp)
+            .width(80.dp),
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
         Surface(
             shape = RoundedCornerShape(16.dp),
-        color = color.copy(alpha = 0.5f),
-        modifier = Modifier.padding(horizontal = 4.dp)
+            color = color.copy(alpha = 0.2f),
         ) {
             Text(
                 text = label,
-            style = MaterialTheme.typography.labelMedium,
+                style = MaterialTheme.typography.labelSmall,
                 color = MaterialTheme.colorScheme.onSurface,
                 modifier = Modifier.padding(horizontal = 8.dp, vertical = 2.dp)
             )
         }
+
+        Spacer(modifier = Modifier.height(4.dp))
+
+        // The "Slider" representation
+        LinearProgressIndicator(
+            progress = { progress },
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(4.dp)
+                .clip(CircleShape),
+            color = color,
+            trackColor = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.1f),
+            strokeCap = StrokeCap.Round
+        )
+    }
 }
 
 @Composable

app/src/main/java/eu/gaudian/translator/viewmodel/VocabularyViewModel.kt

@@ -986,15 +986,15 @@ class VocabularyViewModel @Inject constructor(
     }
 
     suspend fun getExampleForItem(itemId: Int, isFirstWord: Boolean, languageFirst: Language?, languageSecond: Language?): Pair<String, String>? {
-        Log.d(TAG, "Fetching example for item ID $itemId")
 
         val item = getVocabularyItemById(itemId) ?: return null
-        val word = if (isFirstWord) item.wordFirst else item.wordSecond
-        val wordTranslation = if (!isFirstWord) item.wordFirst else item.wordSecond
-
         if (languageFirst == null || languageSecond == null) return null
 
-        return dictionaryService.getExampleSentence(word, wordTranslation, languageFirst, languageSecond).getOrNull()
+        return if (isFirstWord) {
+            dictionaryService.getExampleSentence(item.wordFirst , item.wordSecond, languageFirst, languageSecond).getOrNull()
+        } else {
+            dictionaryService.getExampleSentence(item.wordSecond, item.wordFirst , languageSecond, languageFirst).getOrNull()
+        }
     }
 
     suspend fun fetchAndUpdateZipfFrequency(item: VocabularyItem): VocabularyItem {