Refactor BottomNavBar visibility and add Daily Review feature

app/src/main/java/eu/gaudian/translator/view/MainActivity.kt

@@ -253,19 +253,23 @@ fun TranslatorApp(
                             val currentDestination = navBackStackEntry?.destination
                             val selectedScreen = Screen.fromDestination(currentDestination)
 
-                            @Suppress("HardCodedStringLiteral") val isBottomBarHidden = currentDestination?.hierarchy?.any { destination ->
+                            @Suppress("HardCodedStringLiteral")
+                            val currentRoute = currentDestination?.route
+                            val isHiddenByHierarchy = currentDestination?.hierarchy?.any { destination ->
                                 destination.route in setOf(
                                     Screen.Translation.route,
                                     Screen.Dictionary.route,
                                     Screen.Exercises.route,
                                     Screen.Settings.route
                                 )
-                            } == true || currentDestination?.route in setOf(
+                            } == true
-                                "start_exercise",
+                            val isBottomBarHidden = isHiddenByHierarchy || currentRoute in setOf(
                                 "new_word",
                                 "new_word_review",
-                                "vocabulary_detail/{itemId}"
+                                "vocabulary_detail/{itemId}",
-                            )
+                                "daily_review"
+                            ) || currentRoute?.startsWith("start_exercise") == true
+                            || currentRoute?.startsWith("vocabulary_exercise") == true
                             val showBottomNavLabels by settingsViewModel.showBottomNavLabels.collectAsStateWithLifecycle(initialValue = false)
 
                             BottomNavigationBar(

app/src/main/java/eu/gaudian/translator/view/Navigation.kt

@@ -29,10 +29,10 @@ import eu.gaudian.translator.view.exercises.MainExerciseScreen
 import eu.gaudian.translator.view.exercises.StartExerciseScreen
 import eu.gaudian.translator.view.exercises.YouTubeBrowserScreen
 import eu.gaudian.translator.view.exercises.YouTubeExerciseScreen
+import eu.gaudian.translator.view.home.DailyReviewScreen
 import eu.gaudian.translator.view.home.HomeScreen
 import eu.gaudian.translator.view.library.LibraryScreen
 import eu.gaudian.translator.view.settings.DictionaryOptionsScreen
-import eu.gaudian.translator.view.settings.SettingsRoutes
 import eu.gaudian.translator.view.settings.TranslationSettingsScreen
 import eu.gaudian.translator.view.settings.settingsGraph
 import eu.gaudian.translator.view.stats.StatsScreen
@@ -53,6 +53,7 @@ import eu.gaudian.translator.view.vocabulary.VocabularySortingScreen
 private const val TRANSITION_DURATION = 300
 
 object NavigationRoutes {
+    const val DAILY_REVIEW = "daily_review"
     const val NEW_WORD = "new_word"
     const val NEW_WORD_REVIEW = "new_word_review"
     const val VOCABULARY_DETAIL = "vocabulary_detail"
@@ -68,6 +69,7 @@ object NavigationRoutes {
     const val STATS_VOCABULARY_LIST = "stats/vocabulary_list"
 }
 
+@OptIn(androidx.compose.animation.ExperimentalAnimationApi::class)
 @Composable
 fun AppNavHost(
     navController: NavHostController,
@@ -81,15 +83,23 @@ fun AppNavHost(
         Screen.Home.route,
         Screen.Library.route,
         Screen.Stats.route,
-        Screen.Translation.route,
+
-        Screen.Dictionary.route,
-        Screen.Exercises.route,
-        SettingsRoutes.LIST
     )
 
     // Helper to check if a route is a top-level tab
+    // Note: Routes can be "main_home", "main_library" etc. but mainTabRoutes contains parent routes
     fun isTabTransition(initial: String?, target: String?): Boolean {
-        return mainTabRoutes.contains(initial) && mainTabRoutes.contains(target)
+        if (initial == null || target == null) return false
+        // Check if either the direct route OR a "main_*" variant is in mainTabRoutes
+        val initialIsTab = mainTabRoutes.contains(initial) || 
+            mainTabRoutes.any { route -> 
+                initial == "main_${route}" || initial.startsWith("${route}_")
+            }
+        val targetIsTab = mainTabRoutes.contains(target) || 
+            mainTabRoutes.any { route -> 
+                target == "main_${route}" || target.startsWith("${route}_")
+            }
+        return initialIsTab && targetIsTab
     }
 
     NavHost(
@@ -146,6 +156,10 @@ fun AppNavHost(
             HomeScreen(navController = navController)
         }
 
+        composable(NavigationRoutes.DAILY_REVIEW) {
+            DailyReviewScreen(navController = navController)
+        }
+
         composable(NavigationRoutes.NEW_WORD) {
             NewWordScreen(navController = navController)
         }

app/src/main/java/eu/gaudian/translator/view/home/HomeScreen.kt

@@ -62,6 +62,7 @@ fun HomeScreen(
     val streak by viewModel.streak.collectAsState()
     val dailyGoal by viewModel.dailyGoal.collectAsState()
     val todayCompletedCount by viewModel.todayCompletedCount.collectAsState()
+    val dueTodayCount by viewModel.dueTodayCount.collectAsState()
 
     // Calculate daily goal progress
     val progress = if (dailyGoal > 0) {
@@ -95,13 +96,12 @@ fun HomeScreen(
                 )
             }
             item {
-                //TODO replace with actual implementation
-                @Suppress("HardCodedStringLiteral")
                 ActionCard(
-                    title = "Daily Review",
+                    title = stringResource(R.string.label_daily_review),
-                    subtitle = "42 words need attention",
+                    subtitle = stringResource(R.string.desc_daily_review_due, dueTodayCount),
                     icon = Icons.Default.Psychology,
-                    contentColor = MaterialTheme.colorScheme.onPrimary
+                    contentColor = MaterialTheme.colorScheme.onPrimary,
+                    onClick = { navController.navigate(NavigationRoutes.DAILY_REVIEW) }
                 )
             }
             item {

app/src/main/res/values/strings.xml

@@ -1088,6 +1088,9 @@
     <string name="label_2d_days">%1$d Days</string>
     <string name="label_current_streak">Current Streak</string>
     <string name="label_daily_goal">Daily Goal</string>
+    <string name="label_daily_review">Daily Review</string>
+    <string name="desc_daily_review_due">%1$d words need attention</string>
+    <string name="text_daily_review_placeholder">Daily review screen - implementation pending</string>
     <string name="text_desc_no_activity_data_available">No activity data available</string>
     <string name="label_see_history">See History</string>
     <string name="label_weekly_progress">Weekly Progress</string>