style: address IDE warnings

Remove unused imports and an unused spacing constant, drop redundant if
checks and redundant opt-in markers, replace loop variables with
destructuring, convert a string concatenation to a template, use
Configuration.screenHeightDp instead of LocalWindowInfo.containerSize, and
opt in to ExperimentalSerializationApi for decodeFromStream.

README.md

@@ -21,6 +21,7 @@ The app stores dictionaries as DictZip files and builds compact binary indexes f
 ## Features
 
 - Fast headword search across multiple DSL dictionaries.
+- Search history in the empty search state: recent queries with per-entry removal and clear-all.
 - Import local `.dsl`, `.dsl.gz`, and `.dsl.dz` dictionary files.
 - Download dictionaries from configured URLs, with an optional `{DATE}` placeholder for dated releases.
 - Automatic extraction, DictZip compression, and indexing.

app/src/main/java/com/example/research/MainActivity.kt

@@ -31,8 +31,6 @@ import com.example.research.feature.search.SearchAction
 import com.example.research.feature.search.SearchViewModel
 import com.example.research.ui.navigation.AppNavigation
 import com.example.research.ui.settings.SettingsViewModel
-import kotlinx.coroutines.flow.first
-import kotlinx.coroutines.runBlocking
 
 class MainActivity : ComponentActivity() {
     companion object {
@@ -47,13 +45,11 @@ class MainActivity : ComponentActivity() {
         val app = application as ReSearchApplication
         viewModelFactory {
             initializer {
-                SearchViewModel(application, app.localDictionaryRepository, createSavedStateHandle())
+                SearchViewModel(application, app.localDictionaryRepository, app.preferencesManager, createSavedStateHandle())
             }
         }
     }
 
-    private var initialSectionExpansion: SectionExpansionStates? = null
-
     private val settingsViewModel: SettingsViewModel by viewModels {
         val app = application as ReSearchApplication
         val versionName = try {
@@ -72,9 +68,10 @@ class MainActivity : ComponentActivity() {
                     app.dictionaryImportManager,
                     app.dictionaryProgressStateHolder,
                     versionName,
-                    initialSectionExpansion ?: SectionExpansionStates(
+                    app.initialLaunch.value?.sectionExpansion ?: SectionExpansionStates(
                         isThemeExpanded = false,
                         isLanguageExpanded = false,
+                        isSearchBarExpanded = false,
                         isDictionariesExpanded = true,
                     ),
                 )
@@ -87,19 +84,16 @@ class MainActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
         requestNotificationPermissionIfNeeded()
 
-        // Load theme and language synchronously before setContent to prevent flashing
         val app = application as ReSearchApplication
-        val initialTheme = loadInitialTheme(app)
-        val initialLanguage = loadInitialLanguage(app)
-        val initialHadNoDictionaries = loadInitialHadNoDictionaries(app)
-        initialSectionExpansion = loadInitialSectionExpansion(app)
-
         handleIntent(intent)
         setContent {
+            val initialLaunch by app.initialLaunch.collectAsStateWithLifecycle()
+            val launch = initialLaunch ?: return@setContent
+
             val settingsState by settingsViewModel.uiState.collectAsStateWithLifecycle()
             // Use loaded values initially, then switch to state values when ready
-            val theme = settingsState.theme.takeIf { it != AppTheme.SYSTEM } ?: initialTheme
+            val theme = settingsState.theme.takeIf { it != AppTheme.SYSTEM } ?: launch.theme
-            val language = settingsState.language.takeIf { it != "system" } ?: initialLanguage
+            val language = settingsState.language.takeIf { it != "system" } ?: launch.language
             val darkTheme = when (theme) {
                 AppTheme.LIGHT -> false
                 AppTheme.DARK -> true
@@ -115,7 +109,7 @@ class MainActivity : ComponentActivity() {
                             AppNavigation(
                                 searchViewModel = searchViewModel,
                                 settingsViewModel = settingsViewModel,
-                                seedNoDictionaries = initialHadNoDictionaries
+                                seedNoDictionaries = launch.seedNoDictionaries
                             )
                         }
                     }
@@ -138,69 +132,6 @@ class MainActivity : ComponentActivity() {
         }
     }
 
-    /**
-     * Load initial theme synchronously from DataStore to prevent theme flashing.
-     * This is called before setContent to ensure the correct theme is applied immediately.
-     * Uses runBlocking to synchronously read from DataStore.
-     */
-    private fun loadInitialTheme(app: ReSearchApplication): AppTheme {
-        return try {
-            runBlocking {
-                val themeString = app.preferencesManager.themeMode.first()
-                try {
-                    AppTheme.valueOf(themeString)
-                } catch (_: Exception) {
-                    android.util.Log.w("MainActivity", "Invalid theme value: $themeString, using SYSTEM")
-                    AppTheme.SYSTEM
-                }
-            }
-        } catch (e: Exception) {
-            android.util.Log.e("MainActivity", "Failed to load theme preference: ${e.message}")
-            AppTheme.SYSTEM
-        }
-    }
-
-    /**
-     * Load initial language synchronously from DataStore to prevent language flashing.
-     * This is called before setContent to ensure the correct language is applied immediately.
-     * Uses runBlocking to synchronously read from DataStore.
-     */
-    private fun loadInitialLanguage(app: ReSearchApplication): String {
-        return try {
-            runBlocking {
-                app.preferencesManager.language.first()
-            }
-        } catch (e: Exception) {
-            android.util.Log.e("MainActivity", "Failed to load language preference: ${e.message}")
-            "system"
-        }
-    }
-
-    private fun loadInitialHadNoDictionaries(app: ReSearchApplication): Boolean {
-        return try {
-            runBlocking {
-                app.preferencesManager.hadNoDictionaries.first()
-            }
-        } catch (_: Exception) {
-            true
-        }
-    }
-
-    private fun loadInitialSectionExpansion(app: ReSearchApplication): SectionExpansionStates {
-        return try {
-            runBlocking {
-                app.preferencesManager.sectionExpansionStates()
-            }
-        } catch (e: Exception) {
-            android.util.Log.e("MainActivity", "Failed to load section expansion states: ${e.message}")
-            SectionExpansionStates(
-                isThemeExpanded = false,
-                isLanguageExpanded = false,
-                isDictionariesExpanded = true,
-            )
-        }
-    }
-
     override fun onNewIntent(intent: Intent) {
         super.onNewIntent(intent)
         handleIntent(intent)

app/src/main/java/com/example/research/ReSearchApplication.kt

@@ -3,7 +3,9 @@ package com.example.research
 import android.app.Application
 import com.example.research.common.progress.DictionaryProgressStateHolder
 import com.example.research.common.util.NotificationHelper
+import com.example.research.core.domain.model.AppTheme
 import com.example.research.data.local.preferences.PreferencesManager
+import com.example.research.data.local.preferences.SectionExpansionStates
 import com.example.research.data.repository.LocalDictionaryRepository
 import com.example.research.feature.download.DownloadManager
 import com.example.research.feature.download.repository.DictionaryRepository
@@ -12,10 +14,25 @@ import com.example.research.feature.import.DictionaryImportManager
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 import okhttp3.OkHttpClient
 import okhttp3.Protocol
 
+/**
+ * Values a cold start needs before the first composed frame: the initial
+ * theme, locale, empty-library navigation seed, and settings expansion state.
+ */
+data class InitialLaunch(
+    val theme: AppTheme,
+    val language: String,
+    val seedNoDictionaries: Boolean,
+    val sectionExpansion: SectionExpansionStates,
+)
+
 class ReSearchApplication : Application() {
 
     lateinit var preferencesManager: PreferencesManager
@@ -43,6 +60,9 @@ class ReSearchApplication : Application() {
         private set
     private val applicationScope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
 
+    private val _initialLaunch = MutableStateFlow<InitialLaunch?>(null)
+    val initialLaunch: StateFlow<InitialLaunch?> = _initialLaunch.asStateFlow()
+
     override fun onCreate() {
         super.onCreate()
 
@@ -53,6 +73,9 @@ class ReSearchApplication : Application() {
         applicationScope.launch(Dispatchers.IO) {
             preferencesManager.sanitizeDictionarySources()
         }
+        applicationScope.launch(Dispatchers.IO) {
+            _initialLaunch.value = loadInitialLaunch()
+        }
         localDictionaryRepository = LocalDictionaryRepository(this, preferencesManager = preferencesManager)
 
         okHttpClient = OkHttpClient.Builder()
@@ -121,6 +144,24 @@ class ReSearchApplication : Application() {
         downloadManager.onTerminal = dictionaryPipelineCoordinator::onDownloadTerminal
     }
 
+    private suspend fun loadInitialLaunch(): InitialLaunch {
+        val defaultExpansions = SectionExpansionStates(
+            isThemeExpanded = false,
+            isLanguageExpanded = false,
+            isSearchBarExpanded = false,
+            isDictionariesExpanded = true,
+        )
+        return InitialLaunch(
+            theme = runCatching { AppTheme.valueOf(preferencesManager.themeMode.first()) }
+                .getOrDefault(AppTheme.SYSTEM),
+            language = runCatching { preferencesManager.language.first() }.getOrDefault("system"),
+            seedNoDictionaries = runCatching { preferencesManager.hadNoDictionaries.first() }
+                .getOrDefault(true),
+            sectionExpansion = runCatching { preferencesManager.sectionExpansionStates() }
+                .getOrDefault(defaultExpansions),
+        )
+    }
+
     override fun onTrimMemory(level: Int) {
         super.onTrimMemory(level)
         if (::localDictionaryRepository.isInitialized) {

app/src/main/java/com/example/research/common/ui/AppBackButton.kt

@@ -0,0 +1,25 @@
+package com.example.research.common.ui
+
+import androidx.compose.foundation.layout.size
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import com.example.research.R
+
+@Composable
+fun AppBackButton(
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    IconButton(onClick = onClick, modifier = modifier.size(48.dp)) {
+        Icon(
+            painter = painterResource(R.drawable.ic_arrow_back),
+            contentDescription = stringResource(R.string.action_back),
+            modifier = Modifier.size(28.dp)
+        )
+    }
+}

app/src/main/java/com/example/research/common/util/FileStorageManager.kt

@@ -19,6 +19,8 @@ class FileStorageManager {
         private const val DELETE_WAIT_INTERVAL = 50L
         private const val MAX_DELETE_WAIT_COUNT = 10
         private const val DEFAULT_MAX_RETRIES = 5
+        private const val CREATE_RETRY_DELAY = 100L
+        private const val MAX_CREATE_RETRIES = 3
         private const val TAG = "FileStorageManager"
     }
 
@@ -87,6 +89,7 @@ class FileStorageManager {
                         Log.e(TAG, "Could not delete existing file: $fileName")
                         return@withContext null
                     }
+                    waitForDeletion(targetFile)
                 } else {
                     return@withContext Uri.fromFile(targetFile)
                 }
@@ -95,7 +98,18 @@ class FileStorageManager {
             if (tempBinFile.exists()) {
                 tempBinFile.delete()
             }
-            if (targetFile.createNewFile()) {
+            var created = targetFile.createNewFile()
+            var createAttempt = 0
+            while (!created && createAttempt < MAX_CREATE_RETRIES) {
+                delay(CREATE_RETRY_DELAY.milliseconds)
+                if (targetFile.exists()) {
+                    targetFile.delete()
+                    waitForDeletion(targetFile)
+                }
+                created = targetFile.createNewFile()
+                createAttempt++
+            }
+            if (created) {
                 Uri.fromFile(targetFile)
             } else {
                 Log.e(TAG, "Failed to create file: $fileName")
@@ -141,6 +155,15 @@ class FileStorageManager {
         }
     }
 
+    // FUSE-backed storage keeps a just-deleted file visible to stat/open for a short window
+    private suspend fun waitForDeletion(file: File) {
+        var waitCount = 0
+        while (file.exists() && waitCount < MAX_DELETE_WAIT_COUNT) {
+            delay(DELETE_WAIT_INTERVAL.milliseconds)
+            waitCount++
+        }
+    }
+
     private suspend fun waitForFileDeletion(file: DocumentFile) {
         var waitCount = 0
         while (file.exists() && waitCount < MAX_DELETE_WAIT_COUNT) {

app/src/main/java/com/example/research/common/util/NotificationHelper.kt

@@ -59,13 +59,12 @@ class NotificationHelper(private val context: Context) : NotificationPort {
         val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as? NotificationManager
         manager?.createNotificationChannel(channel)
     }
-    private fun canShowNotification(): Boolean {
+    private fun canShowNotification(): Boolean =
-        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.TIRAMISU) return true
+        android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.TIRAMISU ||
-        return ContextCompat.checkSelfPermission(
+            ContextCompat.checkSelfPermission(
-            context,
+                context,
-            android.Manifest.permission.POST_NOTIFICATIONS
+                android.Manifest.permission.POST_NOTIFICATIONS
-        ) == android.content.pm.PackageManager.PERMISSION_GRANTED
+            ) == android.content.pm.PackageManager.PERMISSION_GRANTED
-    }
     override fun showProgress(percent: Int, titleRes: Int) {
         showUnifiedProgressNotification(
             title = context.getString(titleRes),

app/src/main/java/com/example/research/core/domain/model/DictionarySource.kt

@@ -106,7 +106,7 @@ data class DictionarySource(
             return when {
                 trimmed.isBlank() -> ValidationResult.Error(ValidationError.EMPTY)
                 trimmed.length > 2048 -> ValidationResult.Error(ValidationError.TOO_LONG)
-                !trimmed.startsWith("http://") && !trimmed.startsWith("https://") ->
+                !trimmed.startsWith("https://") ->
                     ValidationResult.Error(ValidationError.INVALID_PROTOCOL)
                 !lowerTemplate.endsWith(".gz") &&
                     !lowerTemplate.endsWith(".dsl") &&

app/src/main/java/com/example/research/data/local/preferences/PreferencesManager.kt

@@ -20,6 +20,7 @@ private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(na
 data class SectionExpansionStates(
     val isThemeExpanded: Boolean,
     val isLanguageExpanded: Boolean,
+    val isSearchBarExpanded: Boolean,
     val isDictionariesExpanded: Boolean,
 )
 
@@ -28,12 +29,19 @@ class PreferencesManager(private val context: Context) {
         val THEME_MODE = stringPreferencesKey("theme_mode")
         val DICTIONARY_SOURCES = stringPreferencesKey("dictionary_sources")
         val LANGUAGE = stringPreferencesKey("language")
+        val SEARCH_BAR_POSITION = stringPreferencesKey("search_bar_position")
         val IS_THEME_EXPANDED = booleanPreferencesKey("is_theme_expanded")
         val IS_LANGUAGE_EXPANDED = booleanPreferencesKey("is_language_expanded")
+        val IS_SEARCH_BAR_EXPANDED = booleanPreferencesKey("is_search_bar_expanded")
         val IS_DICTIONARIES_EXPANDED = booleanPreferencesKey("is_dictionaries_expanded")
         val DISABLED_DICTIONARY_PATHS = stringSetPreferencesKey("disabled_dictionary_paths")
         val HAD_NO_DICTIONARIES = booleanPreferencesKey("had_no_dictionaries")
         val DICTIONARY_STATUS = stringPreferencesKey("dictionary_status")
+        val SEARCH_HISTORY = stringPreferencesKey("search_history")
+    }
+
+    private companion object {
+        const val MAX_SEARCH_HISTORY_ENTRIES = 100
     }
 
     private val json = Json { ignoreUnknownKeys = true }
@@ -57,6 +65,17 @@ class PreferencesManager(private val context: Context) {
         }
     }
 
+    val searchBarPosition: Flow<String> = context.dataStore.data
+        .map { preferences ->
+            preferences[PreferencesKeys.SEARCH_BAR_POSITION] ?: "TOP"
+        }
+
+    suspend fun saveSearchBarPosition(position: String) {
+        context.dataStore.edit { preferences ->
+            preferences[PreferencesKeys.SEARCH_BAR_POSITION] = position
+        }
+    }
+
     val dictionarySources: Flow<List<DictionarySource>> = context.dataStore.data
         .map { preferences ->
             val sourcesJson = preferences[PreferencesKeys.DICTIONARY_SOURCES]
@@ -101,6 +120,7 @@ class PreferencesManager(private val context: Context) {
             SectionExpansionStates(
                 isThemeExpanded = preferences[PreferencesKeys.IS_THEME_EXPANDED] ?: false,
                 isLanguageExpanded = preferences[PreferencesKeys.IS_LANGUAGE_EXPANDED] ?: false,
+                isSearchBarExpanded = preferences[PreferencesKeys.IS_SEARCH_BAR_EXPANDED] ?: false,
                 isDictionariesExpanded = preferences[PreferencesKeys.IS_DICTIONARIES_EXPANDED] ?: true,
             )
         }
@@ -143,6 +163,11 @@ class PreferencesManager(private val context: Context) {
             preferences[PreferencesKeys.IS_LANGUAGE_EXPANDED] ?: false
         }
 
+    val isSearchBarExpanded: Flow<Boolean> = context.dataStore.data
+        .map { preferences ->
+            preferences[PreferencesKeys.IS_SEARCH_BAR_EXPANDED] ?: false
+        }
+
     val isDictionariesExpanded: Flow<Boolean> = context.dataStore.data
         .map { preferences ->
             preferences[PreferencesKeys.IS_DICTIONARIES_EXPANDED] ?: true
@@ -153,6 +178,7 @@ class PreferencesManager(private val context: Context) {
             when (key) {
                 "theme" -> preferences[PreferencesKeys.IS_THEME_EXPANDED] = isExpanded
                 "language" -> preferences[PreferencesKeys.IS_LANGUAGE_EXPANDED] = isExpanded
+                "search_bar" -> preferences[PreferencesKeys.IS_SEARCH_BAR_EXPANDED] = isExpanded
                 "dictionaries" -> preferences[PreferencesKeys.IS_DICTIONARIES_EXPANDED] = isExpanded
             }
         }
@@ -199,6 +225,51 @@ class PreferencesManager(private val context: Context) {
         }
     }
 
+    val searchHistory: Flow<List<String>> = context.dataStore.data
+        .map { preferences ->
+            decodeSearchHistory(preferences[PreferencesKeys.SEARCH_HISTORY])
+        }
+
+    suspend fun addSearchHistoryEntry(query: String) {
+        context.dataStore.edit { preferences ->
+            val current = decodeSearchHistory(preferences[PreferencesKeys.SEARCH_HISTORY])
+                .toMutableList()
+            current.removeAll { it.equals(query, ignoreCase = true) }
+            current.add(0, query)
+            preferences[PreferencesKeys.SEARCH_HISTORY] =
+                json.encodeToString(current.take(MAX_SEARCH_HISTORY_ENTRIES))
+        }
+    }
+
+    suspend fun removeSearchHistoryEntry(query: String) {
+        context.dataStore.edit { preferences ->
+            val current = decodeSearchHistory(preferences[PreferencesKeys.SEARCH_HISTORY])
+                .toMutableList()
+            if (current.removeAll { it == query }) {
+                if (current.isEmpty()) {
+                    preferences.remove(PreferencesKeys.SEARCH_HISTORY)
+                } else {
+                    preferences[PreferencesKeys.SEARCH_HISTORY] = json.encodeToString(current)
+                }
+            }
+        }
+    }
+
+    suspend fun clearSearchHistory() {
+        context.dataStore.edit { preferences ->
+            preferences.remove(PreferencesKeys.SEARCH_HISTORY)
+        }
+    }
+
+    private fun decodeSearchHistory(value: String?): List<String> {
+        if (value == null) return emptyList()
+        return try {
+            json.decodeFromString<List<String>>(value)
+        } catch (_: Exception) {
+            emptyList()
+        }
+    }
+
     suspend fun sanitizeDictionarySources() {
         context.dataStore.edit { preferences ->
             val currentSources = decodeSources(

app/src/main/java/com/example/research/data/parser/IndexSearcher.kt

@@ -454,11 +454,7 @@ class IndexSearcher(private val context: Context) {
         val originalWord = readPooledString(source, source.readUnsignedShort())
         val offset = ArticleOffset(source.readLong())
         val length = ArticleLength(source.readInt())
-        val isAlias = if (metadata.version >= 6) {
+        val isAlias = metadata.version >= 6 && source.readUnsignedByte() and ENTRY_FLAG_ALIAS != 0
-            source.readUnsignedByte() and ENTRY_FLAG_ALIAS != 0
-        } else {
-            false
-        }
         return IndexEntry(word, originalWord, offset, length, isAlias = isAlias)
     }
 
@@ -472,8 +468,11 @@ class IndexSearcher(private val context: Context) {
 
     private fun openSource(pathOrUri: String): RandomAccessSource {
         val file = File(pathOrUri)
-        if (!file.exists()) throw DictionaryError.FileSystemError.NotFound(pathOrUri)
+        return if (file.exists()) {
-        return FileSource(file)
+            FileSource(file)
+        } else {
+            throw DictionaryError.FileSystemError.NotFound(pathOrUri)
+        }
     }
     private fun openInputStream(pathOrUri: String): java.io.InputStream {
         val file = File(pathOrUri)

app/src/main/java/com/example/research/data/repository/KotlinDictionaryEngine.kt

@@ -112,20 +112,20 @@ class KotlinDictionaryEngine(private val context: Context) : ProgressIndexingEng
         maxResults: Int
     ): List<IndexEntry> = withContext(Dispatchers.IO) {
         val allResults = mutableListOf<IndexEntry>()
-        for (dict in dictionaries) {
+        for ((name, path, indexPath, _, _, metadata) in dictionaries) {
             try {
-                val indexPath = resolveIndexPath(dict.indexPath)
+                val resolvedIndexPath = resolveIndexPath(indexPath)
-                val entry = indexSearcher.findFirstEntry(indexPath, query)
+                val entry = indexSearcher.findFirstEntry(resolvedIndexPath, query)
                 if (entry != null) {
-                    allResults.add(entry.withDictionary(dict.metadata.name.ifBlank { dict.name }, dict.path))
+                    allResults.add(entry.withDictionary(metadata.name.ifBlank { name }, path))
                 }
                 if (allResults.size >= maxResults) break
             } catch (e: OutOfMemoryError) {
-                Log.e(TAG, "search() - OOM for ${dict.indexPath}", e)
+                Log.e(TAG, "search() - OOM for $indexPath", e)
                 trimMemory(80)
                 break
             } catch (e: Exception) {
-                Log.w(TAG, "search() - error for ${dict.indexPath}: ${e.message}")
+                Log.w(TAG, "search() - error for $indexPath: ${e.message}")
             }
         }
         allResults

app/src/main/java/com/example/research/data/repository/LocalDictionaryRepository.kt

@@ -538,12 +538,12 @@ class LocalDictionaryRepository(
             val dictionaries = mutableDictionaries.value
             if (dictionaries.isEmpty()) return@withContext
 
-            for (dict in dictionaries) {
+            for ((_, _, indexPath) in dictionaries) {
                 try {
-                    val indexPath = resolveIndexPath(dict.indexPath)
+                    val resolvedIndexPath = resolveIndexPath(indexPath)
                     val indexSearcher = engine.getIndexSearcher()
-                    if (!indexSearcher.isMetadataLoaded(indexPath)) {
+                    if (!indexSearcher.isMetadataLoaded(resolvedIndexPath)) {
-                        engine.preloadIndexMetadata(indexPath)
+                        engine.preloadIndexMetadata(resolvedIndexPath)
                     }
                     yield()
                 } catch (_: Exception) { /* Ignore preload failure */ }

app/src/main/java/com/example/research/feature/download/repository/DictionaryChecker.kt

@@ -7,6 +7,7 @@ import com.example.research.common.util.FileStorageManager
 import com.example.research.common.util.DocumentFileInfo
 import com.example.research.core.domain.model.DictionarySource
 import com.example.research.feature.download.config.DictionaryConfig
+import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import okhttp3.OkHttpClient
@@ -101,9 +102,11 @@ class DictionaryChecker(
             }
 
             return@withContext !serverCanOfferNewer
+        } catch (e: CancellationException) {
+            throw e
         } catch (e: Exception) {
             Log.e(TAG, "Error checking currency: ${e.message}", e)
-            false
+            true
         }
     }
 

app/src/main/java/com/example/research/feature/download/repository/DictionaryCleaner.kt

@@ -54,17 +54,17 @@ class DictionaryCleaner(
         for ((prefix, items) in parsedByPrefix) {
             val latestDsl = latestDslDateByPrefix[prefix] ?: continue
             val dslDates = dslDatesByPrefix[prefix].orEmpty()
-            for (item in items) {
+            for ((name, _, date, ext) in items) {
-                if (DateUtils.isDateBefore(item.date, latestDsl)) {
+                if (DateUtils.isDateBefore(date, latestDsl)) {
-                    toDelete.add(item.name)
+                    toDelete.add(name)
                     continue
                 }
-                if (item.ext in indexExtensions && item.date != latestDsl) {
+                if (ext in indexExtensions && date != latestDsl) {
-                    toDelete.add(item.name)
+                    toDelete.add(name)
                     continue
                 }
-                if (item.ext in indexExtensions && item.date !in dslDates) {
+                if (ext in indexExtensions && date !in dslDates) {
-                    toDelete.add(item.name)
+                    toDelete.add(name)
                 }
             }
         }

app/src/main/java/com/example/research/feature/download/repository/DictionaryExtractor.kt

@@ -46,14 +46,13 @@ class DictionaryExtractor(
                 reportProgress(processedIndex.toFloat() / totalFiles)
             }
 
-            for (file in gzFiles) {
+            for ((fileName, uri) in gzFiles) {
-                val fileName = file.name
                 val baseName = fileName.dropLast(DictionaryConfig.GZ_EXTENSION.length)
                 val lowerBaseName = baseName.lowercase()
                 if (baseName.isBlank() ||
                     lowerBaseName.endsWith(DictionaryConfig.GZ_EXTENSION) ||
                     lowerBaseName.endsWith(".txt")) {
-                    ArchiveUtils.deleteFile(context, file.uri)
+                    ArchiveUtils.deleteFile(context, uri)
                     markFileProcessed()
                     continue
                 }
@@ -65,19 +64,19 @@ class DictionaryExtractor(
                 val dslFileName = "$dslBaseName${DictionaryConfig.DSL_EXTENSION}"
                 val existingDslFile = fileStorageManager.findFile(folderUri, dslFileName)
                 if (existingDslFile != null && existingDslFile.exists()) {
-                    ArchiveUtils.deleteFile(context, file.uri)
+                    ArchiveUtils.deleteFile(context, uri)
                     markFileProcessed()
                     continue
                 }
                 val dslUri = fileStorageManager.createFileInFolder(folderUri, dslFileName, overwrite = false)
                     ?: continue
-                val extractResult = ArchiveUtils.extractGzWithBom(context, file.uri, dslUri)
+                val extractResult = ArchiveUtils.extractGzWithBom(context, uri, dslUri)
                 if (extractResult.isSuccess) {
                     val extractedFile = fileStorageManager.getDocumentFile(dslUri)
                     if (extractedFile != null && extractedFile.exists()) {
                         if (extractedFile.length() == 0L) {
                             ArchiveUtils.deleteFile(context, dslUri)
-                            ArchiveUtils.deleteFile(context, file.uri)
+                            ArchiveUtils.deleteFile(context, uri)
                             markFileProcessed()
                             continue
                         }
@@ -92,7 +91,7 @@ class DictionaryExtractor(
                             ArchiveUtils.deleteFile(context, dslUri)
                         }
                     }
-                    ArchiveUtils.deleteFile(context, file.uri)
+                    ArchiveUtils.deleteFile(context, uri)
                 } else {
                     Log.e("DictionaryExtractor", "File extraction error: $fileName")
                     ArchiveUtils.deleteFile(context, dslUri)
@@ -100,12 +99,11 @@ class DictionaryExtractor(
                 markFileProcessed()
             }
 
-            for (file in rawDslFiles) {
+            for ((dslFileName, uri) in rawDslFiles) {
-                val dslFileName = file.name
                 val dzFileName = "$dslFileName.dz"
                 val existingDz = fileStorageManager.findFile(folderUri, dzFileName)
                 if (existingDz != null && existingDz.exists()) {
-                    ArchiveUtils.deleteFile(context, file.uri)
+                    ArchiveUtils.deleteFile(context, uri)
                     markFileProcessed()
                     continue
                 }
@@ -113,11 +111,11 @@ class DictionaryExtractor(
                 val fileBaseProgress = processedIndex.toFloat() / totalFiles
                 val fileProgressWeight = 1f / totalFiles
                 reportProgress(fileBaseProgress)
-                val compressResult = ensureDslDictZip(file.uri, dslFileName, folderUri) { compressProgress ->
+                val compressResult = ensureDslDictZip(uri, dslFileName, folderUri) { compressProgress ->
                     reportProgress(fileBaseProgress + (compressProgress * fileProgressWeight))
                 }
                 if (compressResult.isSuccess) {
-                    ArchiveUtils.deleteFile(context, file.uri)
+                    ArchiveUtils.deleteFile(context, uri)
                 }
                 markFileProcessed()
             }
@@ -130,11 +128,10 @@ class DictionaryExtractor(
                     !lowerName.endsWith(DictionaryConfig.DICTZIP_EXTENSION) &&
                     !lowerName.endsWith(".dsl.gz")
             }
-            for (file in remainingRawDslFiles) {
+            for ((dslFileName, uri) in remainingRawDslFiles) {
-                val dslFileName = file.name
+                val compressResult = ensureDslDictZip(uri, dslFileName, folderUri, onProgress = null)
-                val compressResult = ensureDslDictZip(file.uri, dslFileName, folderUri, onProgress = null)
                 if (compressResult.isSuccess) {
-                    ArchiveUtils.deleteFile(context, file.uri)
+                    ArchiveUtils.deleteFile(context, uri)
                 }
             }
 
@@ -152,18 +149,18 @@ class DictionaryExtractor(
         try {
             withContext(Dispatchers.IO + NonCancellable) {
                 val files = fileStorageManager.listFilesInFolder(folderUri)
-                for (file in files) {
+                for ((name, uri) in files) {
-                    val n = file.name.lowercase()
+                    val n = name.lowercase()
                     val isRawDsl = n.endsWith(DictionaryConfig.DSL_EXTENSION) &&
                         !n.endsWith(DictionaryConfig.DICTZIP_EXTENSION) &&
                         !n.endsWith(".dsl.gz")
                     val isBareDz = n.endsWith(".dz") && !n.endsWith(DictionaryConfig.DICTZIP_EXTENSION)
                     when {
-                        isBareDz -> ArchiveUtils.deleteFile(context, file.uri)
+                        isBareDz -> ArchiveUtils.deleteFile(context, uri)
                         isRawDsl -> {
-                            val pair = fileStorageManager.findFile(folderUri, file.name + ".dz")
+                            val pair = fileStorageManager.findFile(folderUri, "$name.dz")
                             if (pair == null || !pair.exists()) {
-                                ArchiveUtils.deleteFile(context, file.uri)
+                                ArchiveUtils.deleteFile(context, uri)
                             }
                         }
                     }

app/src/main/java/com/example/research/feature/download/repository/DictionaryRepository.kt

@@ -144,9 +144,8 @@ class DictionaryRepository(
         if (filesToDelete.isNotEmpty()) {
             var deletedCount = 0
 
-            for (file in filesToDelete) {
+            for ((fileName, uri) in filesToDelete) {
-                val fileName = file.name
+                val docFile = fileStorageManager.getDocumentFile(uri)
-                val docFile = fileStorageManager.getDocumentFile(file.uri)
                 if (docFile != null && docFile.exists()) {
                     val deleted = docFile.delete()
                     if (deleted) {

app/src/main/java/com/example/research/feature/search/SearchViewModel.kt

@@ -10,6 +10,7 @@ import com.example.research.core.util.onError
 import com.example.research.core.util.onSuccess
 import com.example.research.core.util.sanitizeQuery
 import com.example.research.data.paging.IndexEntryPagingSource
+import com.example.research.data.local.preferences.PreferencesManager
 import com.example.research.data.repository.LocalDictionaryRepository
 import com.example.research.ui.article.ArticleState
 import com.example.research.ui.article.ArticleTextWarmUp
@@ -34,6 +35,7 @@ sealed interface SearchAction {
 class SearchViewModel(
     application: Application,
     private val repository: LocalDictionaryRepository,
+    private val preferencesManager: PreferencesManager,
     private val savedStateHandle: SavedStateHandle
 ) : AndroidViewModel(application) {
 
@@ -51,6 +53,13 @@ class SearchViewModel(
     private val mutableErrorMessage = MutableStateFlow<String?>(null)
     val errorMessage: StateFlow<String?> = mutableErrorMessage.asStateFlow()
 
+    val searchHistory: StateFlow<List<String>> = preferencesManager.searchHistory
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5000),
+            initialValue = emptyList()
+        )
+
     private val indexSearcher by lazy { repository.getIndexSearcher() }
     private var indexWarmupJob: Job? = null
     private var debounceSaveQueryJob: Job? = null
@@ -61,10 +70,12 @@ class SearchViewModel(
     private val activeDictionaries: StateFlow<List<com.example.research.core.domain.model.Dictionary>> =
         repository.dictionaries.map { dictList ->
             dictList.filter { it.isActive }
+        }.distinctUntilChanged { previous, current ->
+            previous.map { it.indexPath } == current.map { it.indexPath }
         }.stateIn(
             scope = viewModelScope,
             started = SharingStarted.WhileSubscribed(5000),
-            initialValue = emptyList()
+            initialValue = repository.dictionaries.value.filter { it.isActive }
         )
 
     init {
@@ -126,6 +137,7 @@ class SearchViewModel(
             }
             is SearchAction.ArticleClicked -> {
                 articleHistory.clear()
+                recordSearchHistory(action.entry.originalWord)
                 loadArticle(action.entry)
             }
             SearchAction.ClearArticle -> clearArticle()
@@ -159,6 +171,26 @@ class SearchViewModel(
         mutableErrorMessage.value = null
     }
 
+    fun removeSearchHistoryEntry(query: String) {
+        viewModelScope.launch {
+            preferencesManager.removeSearchHistoryEntry(query)
+        }
+    }
+
+    fun clearSearchHistory() {
+        viewModelScope.launch {
+            preferencesManager.clearSearchHistory()
+        }
+    }
+
+    private fun recordSearchHistory(query: String) {
+        val trimmed = query.trim()
+        if (trimmed.isBlank()) return
+        viewModelScope.launch {
+            preferencesManager.addSearchHistoryEntry(trimmed)
+        }
+    }
+
     fun saveScrollPosition(index: Int, offset: Int) {
         mutableScrollPosition.value = index to offset
     }
@@ -281,6 +313,7 @@ class SearchViewModel(
                 }
                 entry?.let {
                     currentArticle?.let(articleHistory::addLast)
+                    recordSearchHistory(sanitizedWord)
                     loadArticle(it)
                 }
             }.onError { message, exception ->
@@ -290,11 +323,7 @@ class SearchViewModel(
     }
 
     fun handleExternalSearch(text: String) {
-        viewModelScope.launch {
+        onSearchQueryChanged(text)
-            val sanitizedText = text.sanitizeQuery()
-            mutableSearchQuery.value = sanitizedText
-            searchAndLoadArticle(sanitizedText)
-        }
     }
 
     companion object {

app/src/main/java/com/example/research/ui/about/AboutLibrariesData.kt

@@ -2,9 +2,11 @@ package com.example.research.ui.about
 
 import android.content.Context
 import androidx.annotation.RawRes
+import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.decodeFromStream
 
 @Serializable
 internal data class AboutLibrariesData(
@@ -74,8 +76,8 @@ internal object AboutLibrariesParser {
         ignoreUnknownKeys = true
     }
 
+    @OptIn(ExperimentalSerializationApi::class)
     fun read(context: Context, @RawRes resourceId: Int): AboutLibrariesData =
         context.resources.openRawResource(resourceId)
-            .bufferedReader()
+            .use { stream -> json.decodeFromStream(stream) }
-            .use { reader -> json.decodeFromString(reader.readText()) }
 }

app/src/main/java/com/example/research/ui/about/AboutScreen.kt

@@ -5,7 +5,6 @@ import androidx.compose.animation.core.animateFloatAsState
 import androidx.compose.animation.core.tween
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.ExperimentalLayoutApi
 import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -21,8 +20,6 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.AlertDialogDefaults
 import androidx.compose.material3.BasicAlertDialog
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Surface
@@ -46,20 +43,20 @@ import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.platform.LocalWindowInfo
 import androidx.compose.ui.platform.testTag
-import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.semantics.testTagsAsResourceId
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.example.research.R
+import com.example.research.common.ui.AppBackButton
 import com.example.research.common.ui.components.OutlinedChoiceButton
 import com.example.research.ui.theme.AppWindowInsets
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.withContext
 
-@OptIn(ExperimentalMaterial3Api::class, ExperimentalLayoutApi::class)
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun AboutScreen(
     onNavigateBack: () -> Unit
@@ -94,12 +91,10 @@ fun AboutScreen(
             TopAppBar(
                 title = { Text(stringResource(R.string.about_app_title)) },
                 navigationIcon = {
-                    IconButton(onClick = onNavigateBack) {
+                    AppBackButton(
-                        Icon(
+                        onClick = onNavigateBack,
-                            painter = painterResource(R.drawable.ic_arrow_back),
+                        modifier = Modifier.padding(start = 6.dp)
-                            contentDescription = stringResource(R.string.action_back)
+                    )
-                        )
-                    }
                 },
                 colors = TopAppBarDefaults.topAppBarColors(
                     containerColor = MaterialTheme.colorScheme.surface
@@ -186,7 +181,6 @@ private fun AboutHeader(versionName: String) {
     }
 }
 
-@OptIn(ExperimentalLayoutApi::class)
 @Composable
 private fun AboutLibraryRow(
     modifier: Modifier = Modifier,

app/src/main/java/com/example/research/ui/article/ArticleLinkText.kt

@@ -196,9 +196,7 @@ private suspend fun PointerInputScope.detectReferenceTaps(
             if (change == null) {
                 break
             }
-            if (change.isConsumed ||
+            if ((change.position - downPosition).getDistance() > viewConfiguration.touchSlop) {
-                (change.position - downPosition).getDistance() > viewConfiguration.touchSlop
-            ) {
                 canceled = true
             }
             if (!change.pressed) {

app/src/main/java/com/example/research/ui/article/ArticleScreen.kt

@@ -2,33 +2,58 @@ package com.example.research.ui.article
 
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.interaction.MutableInteractionSource
-import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.text.selection.SelectionContainer
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+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.offset
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
-import androidx.compose.material3.*
+import androidx.compose.foundation.text.selection.SelectionContainer
-import androidx.compose.runtime.*
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.key
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberUpdatedState
 import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.runtime.snapshotFlow
+import androidx.compose.runtime.withFrameNanos
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.luminance
 import androidx.compose.ui.layout.onSizeChanged
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.platform.testTag
-import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.semantics.testTagsAsResourceId
-import androidx.compose.ui.unit.dp
 import androidx.compose.ui.text.AnnotatedString
-import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.style.LineHeightStyle
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.IntSize
+import androidx.compose.ui.unit.dp
 import com.example.research.R
+import com.example.research.common.ui.AppBackButton
 import com.example.research.common.ui.theme.dictionaryTitleLarge
-import com.example.research.ui.theme.Spacing
 import com.example.research.ui.theme.AppWindowInsets
+import com.example.research.ui.theme.Spacing
 
 private const val MERGED_BLOCK_MAX_CHARS = 1500
 private const val MERGED_BLOCK_MAX_ITEMS = 12
@@ -92,13 +117,17 @@ fun ArticleContent(
         }
         is ArticleState.Success -> {
             val articleSaveKey = "${articleState.dictionaryPath}:${articleState.title}"
-            val baseTextStyle = MaterialTheme.typography.bodyLarge.copy(
+            val colorScheme = MaterialTheme.colorScheme
-                color = MaterialTheme.colorScheme.onSurface,
+            val typography = MaterialTheme.typography
-                lineHeightStyle = LineHeightStyle(
+            val baseTextStyle = remember(colorScheme, typography) {
-                    alignment = LineHeightStyle.Alignment.Proportional,
+                typography.bodyLarge.copy(
-                    trim = LineHeightStyle.Trim.Both,
+                    color = colorScheme.onSurface,
-                ),
+                    lineHeightStyle = LineHeightStyle(
-            )
+                        alignment = LineHeightStyle.Alignment.Proportional,
+                        trim = LineHeightStyle.Trim.Both,
+                    ),
+                )
+            }
             val indentStep = 16.dp
 
             // Use scroll position from ArticleState if available (for back navigation)
@@ -263,7 +292,14 @@ fun ArticleTitleBar(
         null -> ""
     }
 
-    val backIcon = painterResource(R.drawable.ic_arrow_back)
+    val backButtonOffset = if (compact) {
+        val titleLineHeight = with(LocalDensity.current) {
+            MaterialTheme.typography.dictionaryTitleLarge.lineHeight.toDp()
+        }
+        Modifier.offset(y = (titleLineHeight - 48.dp) / 2)
+    } else {
+        Modifier
+    }
 
     Surface(
         color = MaterialTheme.colorScheme.surface,
@@ -282,22 +318,15 @@ fun ArticleTitleBar(
                             .height(Spacing.topBarHeight)
                     }
                 ),
-            verticalAlignment = Alignment.CenterVertically
+            verticalAlignment = if (compact) Alignment.Top else Alignment.CenterVertically
         ) {
             if (showBackButton) {
-                Box(
+                AppBackButton(
+                    onClick = onNavigateBack,
                     modifier = Modifier
-                        .padding(start = Spacing.iconStart)
+                        .padding(start = 10.dp)
-                        .size(24.dp)
+                        .then(backButtonOffset)
-                        .clickable(onClick = onNavigateBack),
+                )
-                    contentAlignment = Alignment.Center
-                ) {
-                    Icon(
-                        painter = backIcon,
-                        contentDescription = stringResource(R.string.action_back),
-                        modifier = Modifier.size(24.dp)
-                    )
-                }
             }
 
             key(selectionReset) {
@@ -309,7 +338,7 @@ fun ArticleTitleBar(
                         maxLines = 1,
                         overflow = TextOverflow.Ellipsis,
                         modifier = Modifier
-                            .padding(start = if (showBackButton) Spacing.searchTextStart - Spacing.iconStart - 24.dp else 16.dp)
+                            .padding(start = if (showBackButton) 0.dp else 16.dp)
                             .testTag("article_title")
                             .semantics { testTagsAsResourceId = true }
                     )
@@ -319,7 +348,6 @@ fun ArticleTitleBar(
     }
 }
 
-@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 internal fun ArticleScreen(
     articleState: ArticleState?,

app/src/main/java/com/example/research/ui/main/AdaptiveMainScreen.kt

@@ -23,9 +23,11 @@ fun AdaptiveMainScreen(
     searchState: TextFieldState,
     canSearch: Boolean,
     isLandscape: Boolean,
+    isSearchBarAtBottom: Boolean,
     results: LazyPagingItems<IndexEntry>,
     errorMessage: String?,
     showDictionaryName: Boolean,
+    searchHistory: List<String>,
     articleState: ArticleState?,
     scrollPosition: Pair<Int, Int>,
     onAction: (MainAction) -> Unit,
@@ -46,21 +48,41 @@ fun AdaptiveMainScreen(
         )
     }
 
-    val isQueryEmpty = searchState.text.isEmpty()
     val isShowingDetail = scaffoldState.targetState.primary == PaneAdaptedValue.Expanded
     val isTwoPane =
         scaffoldState.targetState.primary == PaneAdaptedValue.Expanded &&
             scaffoldState.targetState.secondary == PaneAdaptedValue.Expanded
     val listEndPadding = if (isTwoPane) 8.dp else 16.dp
 
-    Column(modifier = Modifier.fillMaxSize()) {
+    val searchBar: @Composable () -> Unit = {
         MainTopBar(
             searchState = searchState,
             enabled = canSearch,
+            isSearchBarAtBottom = isSearchBarAtBottom,
             onQueryChange = { onAction(MainAction.QueryChanged(it)) },
             onClearQuery = { onAction(MainAction.ClearQuery) },
+            searchHistory = searchHistory,
+            onHistoryEntryClick = { onAction(MainAction.HistoryEntryClicked(it)) },
+            onHistoryEntryRemove = { onAction(MainAction.RemoveHistoryEntry(it)) },
+            onClearHistory = { onAction(MainAction.ClearHistory) },
             onNavigateToSettings = onNavigateToSettings
         )
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .then(
+                if (isSearchBarAtBottom) {
+                    Modifier.windowInsetsPadding(WindowInsets.statusBars.union(WindowInsets.ime))
+                } else {
+                    Modifier
+                }
+            )
+    ) {
+        if (!isSearchBarAtBottom) {
+            searchBar()
+        }
 
         ListDetailPaneScaffold(
             directive = PaneScaffoldDirective.Default.copy(
@@ -120,26 +142,21 @@ fun AdaptiveMainScreen(
                 }
             },
         )
+
+        if (isSearchBarAtBottom) {
+            searchBar()
+        }
     }
 
-    LaunchedEffect(articleState, isQueryEmpty, isLandscape) {
+    LaunchedEffect(articleState) {
-        val targetValue = when {
+        val targetValue = if (articleState == null) {
-            isLandscape -> ThreePaneScaffoldValue(
+            ThreePaneScaffoldValue(
-                primary = PaneAdaptedValue.Expanded,
-                secondary = PaneAdaptedValue.Expanded,
-                tertiary = PaneAdaptedValue.Hidden,
-            )
-            articleState == null -> ThreePaneScaffoldValue(
                 primary = PaneAdaptedValue.Hidden,
                 secondary = PaneAdaptedValue.Expanded,
                 tertiary = PaneAdaptedValue.Hidden,
             )
-            isQueryEmpty -> ThreePaneScaffoldValue(
+        } else {
-                primary = PaneAdaptedValue.Expanded,
+            ThreePaneScaffoldValue(
-                secondary = PaneAdaptedValue.Hidden,
-                tertiary = PaneAdaptedValue.Hidden,
-            )
-            else -> ThreePaneScaffoldValue(
                 primary = PaneAdaptedValue.Expanded,
                 secondary = PaneAdaptedValue.Expanded,
                 tertiary = PaneAdaptedValue.Hidden,

app/src/main/java/com/example/research/ui/main/MainAction.kt

@@ -5,4 +5,7 @@ sealed interface MainAction {
     data object ClearQuery : MainAction
     data object ClearError : MainAction
     data class SaveScrollPosition(val index: Int, val offset: Int) : MainAction
+    data class HistoryEntryClicked(val query: String) : MainAction
+    data class RemoveHistoryEntry(val query: String) : MainAction
+    data object ClearHistory : MainAction
 }

app/src/main/java/com/example/research/ui/main/MainScreen.kt

@@ -1,7 +1,14 @@
 package com.example.research.ui.main
 
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.ime
+import androidx.compose.foundation.layout.statusBars
+import androidx.compose.foundation.layout.union
 import androidx.compose.foundation.layout.consumeWindowInsets
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.windowInsetsPadding
@@ -37,9 +44,15 @@ fun MainRoute(
     val results = searchViewModel.searchResults.collectAsLazyPagingItems()
     val errorMessage by searchViewModel.errorMessage.collectAsStateWithLifecycle()
     val articleState by searchViewModel.selectedArticle.collectAsStateWithLifecycle()
+    val searchHistory by searchViewModel.searchHistory.collectAsStateWithLifecycle()
 
     val settingsState by settingsViewModel.uiState.collectAsStateWithLifecycle()
     val searchQuery by searchViewModel.searchQuery.collectAsStateWithLifecycle()
+    if (!settingsState.hasLoadedPreferences) {
+        Box(modifier = Modifier.fillMaxSize())
+        return
+    }
+    val isSearchBarAtBottom = settingsState.searchBarPosition == "BOTTOM"
 
     val scrollPosition = remember(searchViewModel) {
         searchViewModel.scrollPosition.value
@@ -47,17 +60,6 @@ fun MainRoute(
     val searchState = remember(searchViewModel) {
         TextFieldState(initialText = searchViewModel.searchQuery.value)
     }
-    val onMainAction = remember(searchViewModel) {
-        { action: MainAction ->
-            when (action) {
-                is MainAction.QueryChanged -> searchViewModel.onSearchQueryChanged(action.query)
-                MainAction.ClearQuery -> searchViewModel.onAction(SearchAction.ClearQuery)
-                MainAction.ClearError -> searchViewModel.clearError()
-                is MainAction.SaveScrollPosition ->
-                    searchViewModel.saveScrollPosition(action.index, action.offset)
-            }
-        }
-    }
 
     LaunchedEffect(searchState, searchQuery) {
         if (searchState.text.toString() != searchQuery) {
@@ -79,13 +81,9 @@ fun MainRoute(
 
     val showDictionaryName = remember(settingsState) {
         val activeDictionaries = settingsState.dictionaries.filter { it.isActive }
-        if (activeDictionaries.isEmpty()) {
+        activeDictionaries.any { dict ->
-            false
+            val fileName = dict.path.substringAfterLast("/")
-        } else {
+            !DictionaryConfig.isDabkrsDictionary(fileName)
-            activeDictionaries.any { dict ->
-                val fileName = dict.path.substringAfterLast("/")
-                !DictionaryConfig.isDabkrsDictionary(fileName)
-            }
         }
     }
 
@@ -93,14 +91,37 @@ fun MainRoute(
         val isWide = maxWidth >= 600.dp
         val isLandscape = maxWidth > maxHeight
 
+        val onMainAction = remember(searchViewModel, isWide) {
+            { action: MainAction ->
+                when (action) {
+                    is MainAction.QueryChanged -> searchViewModel.onSearchQueryChanged(action.query)
+                    MainAction.ClearQuery -> searchViewModel.onAction(SearchAction.ClearQuery)
+                    MainAction.ClearError -> searchViewModel.clearError()
+                    is MainAction.SaveScrollPosition ->
+                        searchViewModel.saveScrollPosition(action.index, action.offset)
+                    is MainAction.HistoryEntryClicked ->
+                        if (isWide) {
+                            searchViewModel.onAction(SearchAction.SearchAndLoadArticle(action.query))
+                        } else {
+                            searchViewModel.onSearchQueryChanged(action.query)
+                        }
+                    is MainAction.RemoveHistoryEntry ->
+                        searchViewModel.removeSearchHistoryEntry(action.query)
+                    MainAction.ClearHistory -> searchViewModel.clearSearchHistory()
+                }
+            }
+        }
+
         if (isWide) {
             AdaptiveMainScreen(
                 searchState = searchState,
                 canSearch = canSearch,
                 isLandscape = isLandscape,
+                isSearchBarAtBottom = isSearchBarAtBottom,
                 results = results,
                 errorMessage = errorMessage,
                 showDictionaryName = showDictionaryName,
+                searchHistory = searchHistory,
                 articleState = articleState,
                 scrollPosition = scrollPosition,
                 onAction = onMainAction,
@@ -121,9 +142,11 @@ fun MainRoute(
             MainScreen(
                 searchState = searchState,
                 canSearch = canSearch,
+                isSearchBarAtBottom = isSearchBarAtBottom,
                 results = results,
                 errorMessage = errorMessage,
                 showDictionaryName = showDictionaryName,
+                searchHistory = searchHistory,
                 scrollPosition = scrollPosition,
                 onAction = onMainAction,
                 onArticleClick = onArticleClick,
@@ -137,24 +160,58 @@ fun MainRoute(
 internal fun MainScreen(
     searchState: TextFieldState,
     canSearch: Boolean,
+    isSearchBarAtBottom: Boolean,
     results: LazyPagingItems<IndexEntry>,
     errorMessage: String?,
     showDictionaryName: Boolean,
+    searchHistory: List<String>,
     scrollPosition: Pair<Int, Int>,
     onAction: (MainAction) -> Unit,
     onArticleClick: (IndexEntry) -> Unit,
     onNavigateToSettings: () -> Unit
 ) {
-    Scaffold(
+    val searchBar: @Composable () -> Unit = {
-        topBar = {
+        MainTopBar(
-            MainTopBar(
+            searchState = searchState,
+            enabled = canSearch,
+            isSearchBarAtBottom = isSearchBarAtBottom,
+            onQueryChange = { onAction(MainAction.QueryChanged(it)) },
+            onClearQuery = { onAction(MainAction.ClearQuery) },
+            searchHistory = searchHistory,
+            onHistoryEntryClick = { onAction(MainAction.HistoryEntryClicked(it)) },
+            onHistoryEntryRemove = { onAction(MainAction.RemoveHistoryEntry(it)) },
+            onClearHistory = { onAction(MainAction.ClearHistory) },
+            onNavigateToSettings = onNavigateToSettings
+        )
+    }
+
+    if (isSearchBarAtBottom) {
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .windowInsetsPadding(WindowInsets.statusBars.union(WindowInsets.ime))
+        ) {
+            SearchResultsPane(
                 searchState = searchState,
-                enabled = canSearch,
+                results = results,
-                onQueryChange = { onAction(MainAction.QueryChanged(it)) },
+                errorMessage = errorMessage,
-                onClearQuery = { onAction(MainAction.ClearQuery) },
+                showDictionaryName = showDictionaryName,
-                onNavigateToSettings = onNavigateToSettings
+                scrollPosition = scrollPosition,
+                onAction = onAction,
+                onArticleClick = onArticleClick,
+                modifier = Modifier
+                    .weight(1f)
+                    .fillMaxWidth()
+                    .windowInsetsPadding(AppWindowInsets.horizontalSafeDrawing)
+                    .padding(start = Spacing.contentStart, end = 16.dp),
             )
-        },
+            searchBar()
+        }
+        return
+    }
+
+    Scaffold(
+        topBar = { searchBar() },
         contentWindowInsets = AppWindowInsets.navigationOnly
     ) { paddingValues ->
         SearchResultsPane(

app/src/main/java/com/example/research/ui/main/components/MainTopBar.kt

@@ -1,9 +1,18 @@
 package com.example.research.ui.main.components
 
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.WindowInsetsSides
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.ime
+import androidx.compose.foundation.layout.navigationBars
+import androidx.compose.foundation.layout.only
 import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
@@ -17,55 +26,112 @@ import androidx.compose.material3.FilledIconButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.IconButtonDefaults
+import androidx.compose.material3.LocalContentColor
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.Surface
 import androidx.compose.material3.TextField
 import androidx.compose.material3.TextFieldDefaults
+import androidx.compose.material3.rememberModalBottomSheetState
+import androidx.compose.material3.ripple
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.rememberUpdatedState
+import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
-import com.example.research.ui.theme.AppWindowInsets
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.layout.boundsInWindow
+import androidx.compose.ui.layout.onGloballyPositioned
+import androidx.compose.ui.platform.LocalConfiguration
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.semantics.testTagsAsResourceId
 import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import com.example.research.R
 import com.example.research.common.ui.theme.dictionaryTitleLarge
-import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.withTimeoutOrNull
+import com.example.research.ui.theme.AppWindowInsets
 import com.example.research.ui.theme.Spacing
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.launch
+import kotlin.math.roundToInt
+import kotlin.time.Duration.Companion.milliseconds
 
 private val TopBarHeight = Spacing.topBarHeight
 private val TopBarShape = RoundedCornerShape(28.dp)
+private val HistorySheetChrome = 64.dp
+private val HistorySheetMinHeight = 300.dp
 
 @Composable
 fun MainTopBar(
     searchState: TextFieldState,
     enabled: Boolean,
+    isSearchBarAtBottom: Boolean = false,
     onQueryChange: (String) -> Unit,
     onClearQuery: () -> Unit,
+    searchHistory: List<String>,
+    onHistoryEntryClick: (String) -> Unit,
+    onHistoryEntryRemove: (String) -> Unit,
+    onClearHistory: () -> Unit,
     onNavigateToSettings: () -> Unit
 ) {
-    val searchIcon = painterResource(R.drawable.ic_search)
     val closeIcon = painterResource(R.drawable.ic_close)
+    val historyIcon = painterResource(R.drawable.ic_manage_search)
     val settingsIcon = painterResource(R.drawable.ic_settings)
     val clearLabel = stringResource(R.string.clear_search)
+    val historyLabel = stringResource(R.string.recent_searches)
+    val focusManager = LocalFocusManager.current
+
+    var showHistorySheet by remember { mutableStateOf(false) }
+    var topBarBottomPx by remember { mutableIntStateOf(0) }
+    val coroutineScope = rememberCoroutineScope()
+    val density = LocalDensity.current
+    val imeInsets = WindowInsets.ime
+
+    LaunchedEffect(searchHistory.isEmpty()) {
+        if (searchHistory.isEmpty()) showHistorySheet = false
+    }
 
     Surface(
         color = MaterialTheme.colorScheme.surface,
-        modifier = Modifier.fillMaxWidth()
+        modifier = Modifier
+            .fillMaxWidth()
+            .onGloballyPositioned { topBarBottomPx = it.boundsInWindow().bottom.roundToInt() }
     ) {
         Row(
             modifier = Modifier
                 .fillMaxWidth()
-                .windowInsetsPadding(AppWindowInsets.topAndHorizontalSafeDrawing)
+                .windowInsetsPadding(
+                    if (isSearchBarAtBottom) {
+                        AppWindowInsets.horizontalSafeDrawing
+                    } else {
+                        AppWindowInsets.topAndHorizontalSafeDrawing
+                    }
+                )
+                .then(
+                    if (isSearchBarAtBottom) {
+                        Modifier.windowInsetsPadding(
+                            WindowInsets.navigationBars.only(WindowInsetsSides.Bottom)
+                        )
+                    } else {
+                        Modifier
+                    }
+                )
                 .padding(start = 16.dp, top = 8.dp, bottom = 8.dp, end = 16.dp),
             horizontalArrangement = Arrangement.spacedBy(8.dp),
             verticalAlignment = Alignment.CenterVertically
@@ -75,9 +141,21 @@ fun MainTopBar(
                 enabled = enabled,
                 onQueryChange = onQueryChange,
                 onClearQuery = onClearQuery,
-                searchIcon = searchIcon,
                 closeIcon = closeIcon,
                 clearLabel = clearLabel,
+                historyIcon = historyIcon,
+                historyLabel = historyLabel,
+                historyEnabled = searchHistory.isNotEmpty(),
+                onShowHistory = {
+                    focusManager.clearFocus(force = true)
+                    coroutineScope.launch {
+                        withTimeoutOrNull(350.milliseconds) {
+                            snapshotFlow { imeInsets.getBottom(density) > 0 }
+                                .first { visible -> !visible }
+                        }
+                        showHistorySheet = !showHistorySheet
+                    }
+                },
                 modifier = Modifier.weight(1f)
             )
 
@@ -100,18 +178,39 @@ fun MainTopBar(
             }
         }
     }
+
+    if (showHistorySheet) {
+        SearchHistorySheet(
+            history = searchHistory,
+            isSearchBarAtBottom = isSearchBarAtBottom,
+            topBarBottomPx = topBarBottomPx,
+            onDismiss = { showHistorySheet = false },
+            onEntryClick = { entry ->
+                focusManager.clearFocus(force = true)
+                showHistorySheet = false
+                onHistoryEntryClick(entry)
+            },
+            onEntryRemove = onHistoryEntryRemove,
+            onClearAll = {
+                showHistorySheet = false
+                onClearHistory()
+            }
+        )
+    }
 }
 
 @Composable
-@OptIn(ExperimentalMaterial3Api::class)
 private fun SearchField(
     searchState: TextFieldState,
     enabled: Boolean,
     onQueryChange: (String) -> Unit,
     onClearQuery: () -> Unit,
-    searchIcon: androidx.compose.ui.graphics.painter.Painter,
+    closeIcon: Painter,
-    closeIcon: androidx.compose.ui.graphics.painter.Painter,
     clearLabel: String,
+    historyIcon: Painter,
+    historyLabel: String,
+    historyEnabled: Boolean,
+    onShowHistory: () -> Unit,
     modifier: Modifier = Modifier
 ) {
     val containerColor = MaterialTheme.colorScheme.surfaceContainerHighest
@@ -134,11 +233,21 @@ private fun SearchField(
         lineLimits = TextFieldLineLimits.SingleLine,
         leadingIcon = {
             Icon(
-                painter = searchIcon,
+                painter = historyIcon,
-                contentDescription = null,
+                contentDescription = historyLabel,
+                tint = LocalContentColor.current.copy(
+                    alpha = if (historyEnabled) 1f else 0.38f
+                ),
                 modifier = Modifier
                     .offset(x = 4.dp)
-                    .size(24.dp)
+                    .size(28.dp)
+                    .testTag("history_button")
+                    .semantics { testTagsAsResourceId = true }
+                    .clickable(
+                        interactionSource = remember { MutableInteractionSource() },
+                        indication = ripple(bounded = false, radius = 20.dp),
+                        enabled = historyEnabled
+                    ) { onShowHistory() }
             )
         },
         trailingIcon = if (searchState.text.isNotEmpty()) {
@@ -183,3 +292,48 @@ private fun SearchField(
             .semantics { testTagsAsResourceId = true }
     )
 }
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun SearchHistorySheet(
+    history: List<String>,
+    isSearchBarAtBottom: Boolean,
+    topBarBottomPx: Int,
+    onDismiss: () -> Unit,
+    onEntryClick: (String) -> Unit,
+    onEntryRemove: (String) -> Unit,
+    onClearAll: () -> Unit
+) {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    val density = LocalDensity.current
+    val screenHeight = LocalConfiguration.current.screenHeightDp.dp
+    var frozenHeight by remember { mutableStateOf<Dp?>(null) }
+    if (frozenHeight == null) {
+        frozenHeight = if (isSearchBarAtBottom) {
+            screenHeight - HistorySheetChrome - with(density) {
+                WindowInsets.navigationBars.getBottom(this).toDp()
+            }
+        } else {
+            screenHeight - with(density) { topBarBottomPx.toDp() }
+        }
+    }
+    val maxContentHeight = frozenHeight!!
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = sheetState,
+        contentWindowInsets = { WindowInsets(0, 0, 0, 0) },
+        modifier = Modifier.testTag("search_history_sheet")
+    ) {
+        SearchHistoryList(
+            history = history,
+            onEntryClick = onEntryClick,
+            onEntryRemove = onEntryRemove,
+            onClearAll = onClearAll,
+            modifier = Modifier
+                .fillMaxWidth()
+                .heightIn(min = HistorySheetMinHeight, max = maxContentHeight)
+                .padding(horizontal = 24.dp)
+        )
+    }
+}

app/src/main/java/com/example/research/ui/main/components/SearchHistoryList.kt

@@ -0,0 +1,149 @@
+package com.example.research.ui.main.components
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListState
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.ripple
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.semantics.testTagsAsResourceId
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import com.example.research.R
+import com.example.research.common.ui.theme.dictionaryTitleLarge
+import com.example.research.ui.theme.Spacing
+
+@Composable
+fun SearchHistoryList(
+    history: List<String>,
+    onEntryClick: (String) -> Unit,
+    onEntryRemove: (String) -> Unit,
+    onClearAll: () -> Unit,
+    modifier: Modifier = Modifier,
+    listState: LazyListState = rememberLazyListState(),
+    contentPadding: PaddingValues = PaddingValues(),
+) {
+    LazyColumn(
+        modifier = modifier
+            .testTag("search_history")
+            .semantics { testTagsAsResourceId = true },
+        state = listState,
+        contentPadding = contentPadding,
+        verticalArrangement = Arrangement.spacedBy(4.dp)
+    ) {
+        item(key = "history_header", contentType = "history_header") {
+            Row(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(vertical = Spacing.listItemVertical),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(
+                    text = stringResource(R.string.recent_searches),
+                    style = MaterialTheme.typography.titleSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.weight(1f)
+                )
+                Text(
+                    text = stringResource(R.string.clear_search_history),
+                    style = MaterialTheme.typography.titleSmall,
+                    color = MaterialTheme.colorScheme.primary,
+                    softWrap = false,
+                    modifier = Modifier
+                        .padding(end = 18.dp)
+                        .clip(CircleShape)
+                        .background(MaterialTheme.colorScheme.surfaceContainerHighest)
+                        .testTag("clear_history")
+                        .semantics { testTagsAsResourceId = true }
+                        .clickable { onClearAll() }
+                        .padding(horizontal = 12.dp, vertical = 6.dp)
+                )
+            }
+        }
+        items(
+            items = history,
+            key = { it },
+            contentType = { "history_entry" }
+        ) { entry ->
+            SearchHistoryItem(
+                entry = entry,
+                onEntryClick = onEntryClick,
+                onEntryRemove = onEntryRemove
+            )
+        }
+    }
+}
+
+@Composable
+private fun SearchHistoryItem(
+    entry: String,
+    onEntryClick: (String) -> Unit,
+    onEntryRemove: (String) -> Unit
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .testTag("search_history_entry")
+            .semantics { testTagsAsResourceId = true }
+            .clickable { onEntryClick(entry) }
+            .padding(vertical = Spacing.listItemVertical),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Icon(
+            painter = painterResource(R.drawable.ic_history),
+            contentDescription = null,
+            tint = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier
+                .padding(end = 16.dp)
+                .size(20.dp)
+        )
+        Text(
+            text = entry,
+            style = MaterialTheme.typography.dictionaryTitleLarge,
+            maxLines = 1,
+            overflow = TextOverflow.Ellipsis,
+            modifier = Modifier.weight(1f)
+        )
+        Box(
+            contentAlignment = Alignment.Center,
+            modifier = Modifier.width(Spacing.topBarHeight)
+        ) {
+            Icon(
+                painter = painterResource(R.drawable.ic_close),
+                contentDescription = stringResource(R.string.remove_search_history_entry),
+                tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier
+                    .testTag("remove_history_entry")
+                    .semantics { testTagsAsResourceId = true }
+                    .clickable(
+                        interactionSource = remember { MutableInteractionSource() },
+                        indication = ripple(bounded = false, radius = 20.dp)
+                    ) { onEntryRemove(entry) }
+                    .size(20.dp)
+            )
+        }
+    }
+}

app/src/main/java/com/example/research/ui/main/components/SearchResultsList.kt

@@ -1,6 +1,5 @@
 package com.example.research.ui.main.components
 
-import androidx.compose.animation.core.tween
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.*
@@ -56,20 +55,12 @@ fun SearchResultsList(
             val entry = if (showStale) staleEntries.getOrNull(index)
             else if (index in 0 until results.itemCount) results.peek(index) else null
             if (entry != null) {
-                Box(
+                SearchResultItem(
-                    modifier = Modifier.animateItem(
+                    entry = entry,
-                        fadeInSpec = if (index < 8) tween(150) else null,
+                    resultIndex = index,
-                        placementSpec = null,
+                    onArticleClick = onArticleClick,
-                        fadeOutSpec = null
+                    showDictionaryName = showDictionaryName
-                    )
+                )
-                ) {
-                    SearchResultItem(
-                        entry = entry,
-                        resultIndex = index,
-                        onArticleClick = onArticleClick,
-                        showDictionaryName = showDictionaryName
-                    )
-                }
             }
         }
 

app/src/main/java/com/example/research/ui/navigation/AppNavigation.kt

@@ -13,7 +13,6 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
-import androidx.compose.material3.adaptive.ExperimentalMaterial3AdaptiveApi
 import androidx.compose.material3.adaptive.currentWindowAdaptiveInfoV2
 import androidx.compose.runtime.*
 import androidx.compose.runtime.saveable.*
@@ -39,7 +38,6 @@ enum class Screen {
     Home, Settings, Article, About
 }
 
-@OptIn(ExperimentalMaterial3AdaptiveApi::class)
 @Composable
 fun AppNavigation(
     searchViewModel: SearchViewModel,

app/src/main/java/com/example/research/ui/settings/SettingsScreen.kt

@@ -21,7 +21,6 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.SnackbarHost
@@ -46,17 +45,18 @@ import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.repeatOnLifecycle
 import com.example.research.R
+import com.example.research.common.ui.AppBackButton
 import com.example.research.common.ui.appTestTag
 import com.example.research.common.ui.components.CollapsibleHeader
 import com.example.research.common.ui.components.SectionCard
 import com.example.research.ui.settings.components.DictionaryManagement
 import com.example.research.ui.settings.components.LanguageSelectionSection
+import com.example.research.ui.settings.components.SearchBarPositionSection
 import com.example.research.ui.settings.components.ThemeSelectionSection
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 
-@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun SettingsRoute(
     viewModel: SettingsViewModel,
@@ -126,12 +126,10 @@ fun SettingsScreen(
                 title = { Text(stringResource(R.string.settings_title)) },
                 navigationIcon = {
                     if (showBackButton) {
-                        IconButton(onClick = onNavigateBack) {
+                        AppBackButton(
-                            Icon(
+                            onClick = onNavigateBack,
-                                painter = painterResource(R.drawable.ic_arrow_back),
+                            modifier = Modifier.padding(start = 6.dp)
-                                contentDescription = stringResource(R.string.action_back)
+                        )
-                            )
-                        }
                     }
                 },
                 colors = TopAppBarDefaults.topAppBarColors(
@@ -240,6 +238,24 @@ fun SettingsScreen(
             }
             }
 
+            item(key = "search_bar", contentType = "settings-section") {
+                CollapsibleSettingsSection(
+                title = stringResource(R.string.search_bar_position),
+                iconRes = R.drawable.ic_search,
+                testTag = "search_bar_section",
+                isExpanded = uiState.isSearchBarExpanded,
+                onToggleExpanded = { onEvent(SettingsUiEvent.SectionToggled("search_bar", !uiState.isSearchBarExpanded)) },
+            ) {
+                SearchBarPositionSection(
+                    currentPosition = uiState.searchBarPosition,
+                    onPositionChanged = { position ->
+                        haptic.performHapticFeedback(HapticFeedbackType.TextHandleMove)
+                        onEvent(SettingsUiEvent.SearchBarPositionChanged(position))
+                    }
+                )
+            }
+            }
+
             item(key = "bottom-spacer", contentType = "spacer") {
                 Spacer(modifier = Modifier.height(32.dp))
             }

app/src/main/java/com/example/research/ui/settings/SettingsUiState.kt

@@ -13,8 +13,10 @@ import com.example.research.feature.download.model.DownloadState
 data class SettingsUiState(
     val theme: AppTheme = AppTheme.SYSTEM,
     val language: String = "system",
+    val searchBarPosition: String = "TOP",
     val isThemeExpanded: Boolean = false,
     val isLanguageExpanded: Boolean = false,
+    val isSearchBarExpanded: Boolean = false,
     val isDictionariesExpanded: Boolean = true,
     val dictionaries: List<Dictionary> = emptyList(),
     val dictionaryStatus: DictionaryStatus = DictionaryStatus.Unknown,
@@ -23,6 +25,7 @@ data class SettingsUiState(
     val importState: ImportState = ImportState.Idle,
     val dictionarySources: List<DictionarySource> = emptyList(),
     val hasCompletedStartupScan: Boolean = false,
+    val hasLoadedPreferences: Boolean = false,
     val pipelineIdle: Boolean = true,
     val appVersion: String = "1.0",
 )
@@ -30,6 +33,7 @@ data class SettingsUiState(
 sealed interface SettingsUiEvent {
     data class ThemeChanged(val theme: AppTheme) : SettingsUiEvent
     data class LanguageChanged(val language: String) : SettingsUiEvent
+    data class SearchBarPositionChanged(val position: String) : SettingsUiEvent
     data class SectionToggled(val key: String, val isExpanded: Boolean) : SettingsUiEvent
     data class DictionaryToggled(val path: String) : SettingsUiEvent
     data class DictionaryDeleted(val dictionary: Dictionary) : SettingsUiEvent

app/src/main/java/com/example/research/ui/settings/SettingsViewModel.kt

@@ -46,12 +46,15 @@ private data class DictionaryStateInputs(
 private data class OperationStateInputs(
     val downloadState: DownloadState,
     val language: String,
+    val searchBarPosition: String,
     val importState: ImportState,
     val dictionaryStatus: DictionaryStatus,
     val hasCompletedStartupScan: Boolean,
     val isThemeExpanded: Boolean,
     val isLanguageExpanded: Boolean,
+    val isSearchBarExpanded: Boolean,
     val isDictionariesExpanded: Boolean,
+    val hasLoadedPreferences: Boolean,
 )
 
 class SettingsViewModel(
@@ -89,7 +92,9 @@ class SettingsViewModel(
 
     private val dictionaryStatus = MutableStateFlow<DictionaryStatus>(DictionaryStatus.Unknown)
     private val language = MutableStateFlow("system")
+    private val searchBarPosition = MutableStateFlow("TOP")
     private val hasCompletedStartupScan = MutableStateFlow(false)
+    private val hasLoadedPreferences = MutableStateFlow(false)
 
     private val pendingSourceUrls = ConcurrentHashMap.newKeySet<String>()
     private var isDownloadInProgress = false
@@ -133,8 +138,6 @@ class SettingsViewModel(
 
     private fun setupStateObservation() {
         viewModelScope.launch {
-            var wasIndexing = false
-
             val dictionaryStateInputs = combine(
                 preferencesManager.themeMode.map { mode ->
                     try { AppTheme.valueOf(mode) } catch (_: Exception) { AppTheme.SYSTEM }
@@ -153,39 +156,34 @@ class SettingsViewModel(
             val operationStateInputs = combine(
                 downloadManager.downloadState,
                 language,
+                searchBarPosition,
                 dictionaryImportManager.importState,
                 dictionaryStatus,
                 hasCompletedStartupScan,
                 preferencesManager.isThemeExpanded,
                 preferencesManager.isLanguageExpanded,
+                preferencesManager.isSearchBarExpanded,
                 preferencesManager.isDictionariesExpanded,
+                hasLoadedPreferences,
             ) { params: Array<Any> ->
                 @Suppress("UNCHECKED_CAST")
                 OperationStateInputs(
                     downloadState = params[0] as DownloadState,
                     language = params[1] as String,
-                    importState = params[2] as ImportState,
+                    searchBarPosition = params[2] as String,
-                    dictionaryStatus = params[3] as DictionaryStatus,
+                    importState = params[3] as ImportState,
-                    hasCompletedStartupScan = params[4] as Boolean,
+                    dictionaryStatus = params[4] as DictionaryStatus,
-                    isThemeExpanded = params[5] as Boolean,
+                    hasCompletedStartupScan = params[5] as Boolean,
-                    isLanguageExpanded = params[6] as Boolean,
+                    isThemeExpanded = params[6] as Boolean,
-                    isDictionariesExpanded = params[7] as Boolean,
+                    isLanguageExpanded = params[7] as Boolean,
+                    isSearchBarExpanded = params[8] as Boolean,
+                    isDictionariesExpanded = params[9] as Boolean,
+                    hasLoadedPreferences = params[10] as Boolean,
                 )
             }
 
             combine(dictionaryStateInputs, operationStateInputs) { dictionaryState, operationState ->
-                // Handle indexing completion side effect
                 val isIndexing = dictionaryState.indexingProgress.isIndexing
-                if (wasIndexing && !isIndexing) {
-                    if (isDownloadInProgress) {
-                        isDownloadInProgress = false
-                        dictionaryStatus.value = withContext(Dispatchers.IO) {
-                            evaluateDictionaryStatus()
-                        }
-                    }
-                }
-                wasIndexing = isIndexing
-
                 when (operationState.downloadState) {
                     is DownloadState.Loading, is DownloadState.Extracting -> {
                         isDownloadInProgress = true
@@ -194,6 +192,10 @@ class SettingsViewModel(
                     }
                     is DownloadState.Success -> {
                         pendingSourceUrls.clear()
+                        isDownloadInProgress = false
+                        dictionaryStatus.value = withContext(Dispatchers.IO) {
+                            evaluateDictionaryStatus()
+                        }
                     }
                     is DownloadState.Error -> {
                         isDownloadInProgress = false
@@ -251,14 +253,17 @@ class SettingsViewModel(
                     indexingProgress = IndexingProgress(isIndexing = isIndexing),
                     downloadState = operationState.downloadState,
                     language = operationState.language,
+                    searchBarPosition = operationState.searchBarPosition,
                     importState = operationState.importState,
                     dictionaryStatus = operationState.dictionaryStatus,
                     hasCompletedStartupScan = operationState.hasCompletedStartupScan,
+                    hasLoadedPreferences = operationState.hasLoadedPreferences,
                     pipelineIdle = !isIndexing &&
                         !operationState.downloadState.isActive &&
                         !operationState.importState.isActive,
                     isThemeExpanded = operationState.isThemeExpanded,
                     isLanguageExpanded = operationState.isLanguageExpanded,
+                    isSearchBarExpanded = operationState.isSearchBarExpanded,
                     isDictionariesExpanded = operationState.isDictionariesExpanded,
                     appVersion = _uiState.value.appVersion,
                 )
@@ -269,9 +274,15 @@ class SettingsViewModel(
     }
 
     private fun initialize() {
+        var scanCompleted = false
         viewModelScope.launch {
             try {
-                scanDirectoryInternal(preferencesManager.dictionaryPath)
+                scanCompleted = if (localDictionaryRepository.dictionaries.value.isEmpty()) {
+                    scanDirectoryInternal(preferencesManager.dictionaryPath) is OperationResult.Success
+                } else {
+                    dictionaryStatus.value = DictionaryStatus.UpToDate
+                    false
+                }
             } catch (e: Exception) {
                 android.util.Log.e("SettingsViewModel", "Initial scan failed", e)
                 dictionaryStatus.value = if (localDictionaryRepository.dictionaries.value.isEmpty()) {
@@ -287,10 +298,18 @@ class SettingsViewModel(
                 } catch (e: Exception) {
                     android.util.Log.w("SettingsViewModel", "Failed to load language preference: ${e.message}")
                 }
+                try {
+                    searchBarPosition.value = preferencesManager.searchBarPosition.first()
+                } catch (e: Exception) {
+                    android.util.Log.w("SettingsViewModel", "Failed to load search bar position: ${e.message}")
+                }
+                hasLoadedPreferences.value = true
                 hasCompletedStartupScan.value = true
-                preferencesManager.setHadNoDictionaries(
+                if (scanCompleted) {
-                    localDictionaryRepository.dictionaries.value.isEmpty()
+                    preferencesManager.setHadNoDictionaries(
-                )
+                        localDictionaryRepository.dictionaries.value.isEmpty()
+                    )
+                }
             }
         }
     }
@@ -299,6 +318,7 @@ class SettingsViewModel(
         when (event) {
             is SettingsUiEvent.ThemeChanged -> setTheme(event.theme)
             is SettingsUiEvent.LanguageChanged -> saveLanguage(event.language)
+            is SettingsUiEvent.SearchBarPositionChanged -> saveSearchBarPosition(event.position)
             is SettingsUiEvent.SectionToggled -> saveSectionExpanded(event.key, event.isExpanded)
             is SettingsUiEvent.DictionaryToggled -> toggleDictionaryActive(event.path)
             is SettingsUiEvent.DictionaryDeleted -> deleteDictionary(event.dictionary)
@@ -371,6 +391,13 @@ class SettingsViewModel(
         }
     }
 
+    private fun saveSearchBarPosition(position: String) {
+        viewModelScope.launch {
+            preferencesManager.saveSearchBarPosition(position)
+            searchBarPosition.value = position
+        }
+    }
+
     private fun saveLanguage(languageCode: String) {
         viewModelScope.launch {
             preferencesManager.saveLanguage(languageCode)
@@ -528,6 +555,25 @@ class SettingsViewModel(
     ): List<DictionarySource> =
         DictionarySourceFileMatcher.installedSources(sources, dictionaries)
 
+    private suspend fun installedDictionariesAreCurrent(): Boolean {
+        val sources = preferencesManager.dictionarySources.first()
+        val dictionaries = localDictionaryRepository.dictionaries.first()
+        val datedEnabledSources = installedEnabledSources(sources, dictionaries)
+            .filter { DictionarySource.hasDatePlaceholder(it.urlTemplate) }
+        if (datedEnabledSources.isEmpty()) return true
+        val fileNames = localDictionaryRepository.listDictionaryPayloadFileNames(
+            preferencesManager.dictionaryPath
+        ) ?: return true
+        val today = DateUtils.getCurrentDateString()
+        return datedEnabledSources.all { source ->
+            val baseName = DictionarySource.extractFileName(source.urlTemplate, today)
+                .removeSuffix(".gz")
+                .removeSuffix(".dsl")
+                .removeSuffix(".dz")
+            fileNames.any { it.startsWith(baseName) }
+        }
+    }
+
     private fun cancelDownload() {
         // Cancel the ViewModel-side scan job so no further status recomputes
         localDictionaryRepository.cancelIndexing()
@@ -588,7 +634,10 @@ class SettingsViewModel(
                         "NeedsUpdate" -> DictionaryStatus.NeedsUpdate
                         else -> null
                     }
-                    if (restoredStatus != null && savedStatusDate == DateUtils.getCurrentDateString()) {
+                    if (restoredStatus != null &&
+                        savedStatusDate == DateUtils.getCurrentDateString() &&
+                        withContext(Dispatchers.IO) { installedDictionariesAreCurrent() }
+                    ) {
                         dictionaryStatus.value = restoredStatus
                     } else {
                         dictionaryStatus.value = DictionaryStatus.Checking

app/src/main/java/com/example/research/ui/settings/components/DictionaryManagement.kt

@@ -10,6 +10,8 @@ import androidx.compose.animation.shrinkVertically
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.statusBars
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -218,7 +220,8 @@ fun DictionaryManagement(
                 focusManager.clearFocus(force = true)
                 setShowUrlBottomSheet(false)
             },
-            sheetState = sheetState
+            sheetState = sheetState,
+            contentWindowInsets = { WindowInsets.statusBars }
         ) {
             DictionaryUrlInputContent(
                 existingSources = sources,

app/src/main/java/com/example/research/ui/settings/components/DictionaryUrlInputContent.kt

@@ -3,6 +3,9 @@ package com.example.research.ui.settings.components
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.text.input.InputTransformation
+import androidx.compose.foundation.text.input.TextFieldLineLimits
+import androidx.compose.foundation.text.input.TextFieldState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.ui.res.painterResource
 import androidx.compose.material3.*
@@ -16,7 +19,6 @@ import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.semantics.testTagsAsResourceId
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardType
-import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.unit.dp
 import com.example.research.R
 import com.example.research.core.domain.model.DictionarySource
@@ -64,6 +66,20 @@ private fun validateDictionaryUrl(context: UrlValidationContext): String? {
     }
 }
 
+private val urlInputTransformation = InputTransformation {
+    val text = toString()
+    val filtered = text
+        .take(2048)
+        .filter { char ->
+            !char.isISOControl() &&
+                char != '\u0000' &&
+                char.code !in 128..<160
+        }
+    if (filtered != text) {
+        replace(0, length, filtered)
+    }
+}
+
 @Composable
 fun DictionaryUrlInputContent(
     existingSources: List<DictionarySource>,
@@ -71,7 +87,7 @@ fun DictionaryUrlInputContent(
     onCancel: () -> Unit,
     modifier: Modifier = Modifier
 ) {
-    val urls = remember { mutableStateListOf(TextFieldValue("")) }
+    val urls = remember { mutableStateListOf(TextFieldState("")) }
     val validationErrors = remember { mutableStateMapOf<Int, String>() }
     val scrollState = rememberScrollState()
     val focusManager = LocalFocusManager.current
@@ -96,8 +112,8 @@ fun DictionaryUrlInputContent(
     // Cache prefixes for all input URLs to avoid repeated extraction during recomposition
     val inputUrlPrefixes = remember {
         derivedStateOf {
-            urls.associate { urlValue ->
+            urls.associate { urlState ->
-                val urlString = urlValue.text.trim()
+                val urlString = urlState.text.trim().toString()
                 urlString to if (urlString.isNotEmpty()) {
                     DictionarySource.extractPrefix(urlString)
                 } else null
@@ -119,10 +135,10 @@ fun DictionaryUrlInputContent(
             style = MaterialTheme.typography.headlineSmall
         )
 
-        urls.forEachIndexed { index, urlValue ->
+        urls.forEachIndexed { index, urlState ->
             val isLastItem = index == urls.lastIndex
 
-            val urlString = urlValue.text.trim()
+            val urlString = urlState.text.trim().toString()
             val cachedPrefix = inputUrlPrefixes.value[urlString]
             val realtimeError = remember(urlString, existingPrefixes, urls.size, cachedPrefix) {
                 validateDictionaryUrl(
@@ -130,7 +146,7 @@ fun DictionaryUrlInputContent(
                         url = urlString,
                         existingSources = existingSources,
                         existingPrefixes = existingPrefixes,
-                        urlsInForm = urls.map { it.text.trim() },
+                        urlsInForm = urls.map { it.text.trim().toString() },
                         urlPrefix = cachedPrefix,
                         errorMessages = errorMessages
                     )
@@ -140,20 +156,8 @@ fun DictionaryUrlInputContent(
             val displayError = validationErrors[index] ?: realtimeError
 
             OutlinedTextField(
-                value = urlValue,
+                state = urlState,
-                onValueChange = { newValue ->
+                inputTransformation = urlInputTransformation,
-                    val filtered = newValue.copy(
-                        text = newValue.text
-                            .take(2048)
-                            .filter { char -> 
-                                !char.isISOControl() && 
-                                char != '\u0000' &&
-                                        char.code !in 128..<160
-                            }
-                    )
-                    urls[index] = filtered
-                    validationErrors.remove(index)
-                },
                 label = { Text(if (index == 0) stringResource(R.string.dictionary_source_url_hint) else "URL ${index + 1}") },
                 isError = displayError != null,
                 supportingText = displayError?.let { { Text(it) } },
@@ -168,7 +172,7 @@ fun DictionaryUrlInputContent(
                             Modifier
                         }
                     ),
-                singleLine = true,
+                lineLimits = TextFieldLineLimits.SingleLine,
                 keyboardOptions = KeyboardOptions(
                     keyboardType = KeyboardType.Uri,
                     imeAction = if (isLastItem) ImeAction.Done else ImeAction.Next
@@ -188,7 +192,7 @@ fun DictionaryUrlInputContent(
 
         TextButton(
             onClick = {
-                urls.add(TextFieldValue(""))
+                urls.add(TextFieldState(""))
             },
             modifier = Modifier
                 .align(Alignment.Start)
@@ -224,8 +228,8 @@ fun DictionaryUrlInputContent(
                     val validUrls = mutableListOf<String>()
                     val seenUrls = mutableSetOf<String>()
 
-                    urls.forEachIndexed { index, urlValue ->
+                    urls.forEachIndexed { index, urlState ->
-                        val urlString = urlValue.text.trim()
+                        val urlString = urlState.text.trim().toString()
                         if (urlString.isBlank()) {
                             if (urls.size == 1) {
                                 validationErrors[index] = errorMessages.empty
@@ -263,9 +267,9 @@ fun DictionaryUrlInputContent(
                     .weight(1f)
                     .testTag("add_confirm_button")
                     .semantics { testTagsAsResourceId = true },
-                enabled = urls.any { it.text.trim().isNotBlank() } &&
+                enabled = urls.any { it.text.trim().toString().isNotBlank() } &&
-                         urls.none { urlValue ->
+                         urls.none { urlState ->
-                             val urlString = urlValue.text.trim()
+                             val urlString = urlState.text.trim().toString()
                              if (urlString.isEmpty()) {
                                  false
                              } else {
@@ -275,7 +279,7 @@ fun DictionaryUrlInputContent(
                                          url = urlString,
                                          existingSources = existingSources,
                                          existingPrefixes = existingPrefixes,
-                                         urlsInForm = urls.map { it.text.trim() },
+                                         urlsInForm = urls.map { it.text.trim().toString() },
                                          urlPrefix = urlPrefix,
                                          errorMessages = errorMessages
                                      )

app/src/main/java/com/example/research/ui/settings/components/SearchBarPositionSection.kt

@@ -0,0 +1,41 @@
+package com.example.research.ui.settings.components
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.unit.dp
+import com.example.research.R
+import com.example.research.common.ui.components.OutlinedChoiceButton
+
+@Composable
+fun SearchBarPositionSection(
+    currentPosition: String,
+    onPositionChanged: (String) -> Unit,
+    modifier: Modifier = Modifier
+) {
+    val positions = listOf(
+        "TOP" to stringResource(R.string.search_bar_position_top),
+        "BOTTOM" to stringResource(R.string.search_bar_position_bottom)
+    )
+
+    Row(
+        modifier = modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.spacedBy(4.dp)
+    ) {
+        positions.forEach { (code, label) ->
+            val isSelected = currentPosition == code
+            OutlinedChoiceButton(
+                text = label,
+                onClick = { onPositionChanged(code) },
+                modifier = Modifier
+                    .weight(1f)
+                    .testTag("search_bar_$code"),
+                selected = isSelected
+            )
+        }
+    }
+}

app/src/main/java/com/example/research/ui/theme/Spacing.kt

@@ -6,8 +6,6 @@ object Spacing {
     // Semantic spacing constants for specific UI elements
     val topBarPadding = 8.dp
     val topBarHeight = 56.dp
-    val iconStart = 32.dp
-    val searchTextStart = 68.dp
     val listItemVertical = 8.dp
 
     val contentStart = 32.dp

app/src/main/res/drawable/ic_history.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M13,3A9,9 0 0,0 4,12H1L4.89,15.89L4.96,16.03L9,12H6A7,7 0 0,1 13,5A7,7 0 0,1 20,12A7,7 0 0,1 13,19C11.07,19 9.32,18.21 8.06,16.94L6.64,18.36C8.27,19.99 10.51,21 13,21A9,9 0 0,0 22,12A9,9 0 0,0 13,3M12,8V13L16.28,15.54L17,14.33L13.5,12.25V8H12Z" />
+</vector>

app/src/main/res/drawable/ic_manage_search.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M7,9H2V7h5v2zM7,12H2v2h5v-2zM20.59,19l-3.83,-3.83c-0.8,0.52 -1.74,0.83 -2.76,0.83 -2.76,0 -5,-2.24 -5,-5s2.24,-5 5,-5 5,2.24 5,5c0,1.02 -0.31,1.96 -0.83,2.75L22,17.59 20.59,19zM17,11c0,-1.65 -1.35,-3 -3,-3s-3,1.35 -3,3 1.35,3 3,3 3,-1.35 3,-3zM2,19h10v-2H2v2z" />
+</vector>

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

@@ -12,7 +12,13 @@
     <string name="language_english">Английский</string>
     <string name="language_russian">Русский</string>
     <string name="language_system">Системный</string>
+    <string name="search_bar_position">Строка поиска</string>
+    <string name="search_bar_position_top">Наверху</string>
+    <string name="search_bar_position_bottom">Внизу</string>
     <string name="clear_search">Очистить поиск</string>
+    <string name="recent_searches">История поиска</string>
+    <string name="clear_search_history">Очистить</string>
+    <string name="remove_search_history_entry">Удалить из истории</string>
     <string name="article_return_to_search">Вернуться к поиску</string>
     <string name="error_checking_dictionaries">Не удалось проверить статус словарей</string>
     <string name="error_loading_article">Ошибка загрузки: %1$s</string>
@@ -76,7 +82,7 @@
     <string name="dictionary_source_duplicate_in_form">Дублирующийся URL в форме</string>
     <string name="dictionary_source_duplicate_prefix">Этот словарь уже существует (одинаковый префикс)</string>
     <string name="dictionary_source_url_empty">URL не может быть пустым</string>
-    <string name="dictionary_source_invalid_protocol">Должен начинаться с http:// или https://</string>
+    <string name="dictionary_source_invalid_protocol">Должен начинаться с https://</string>
     <string name="dictionary_source_invalid_extension">Должен заканчиваться на .gz, .dsl или .dsl.dz</string>
     <string name="dictionary_source_too_long">URL слишком длинный (максимум 2048 символов)</string>
     <string name="dictionary_source_invalid_url">Неверный формат URL</string>

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

@@ -12,7 +12,13 @@
     <string name="language_english">English</string>
     <string name="language_russian">Russian</string>
     <string name="language_system">System</string>
+    <string name="search_bar_position">Search bar</string>
+    <string name="search_bar_position_top">Top</string>
+    <string name="search_bar_position_bottom">Bottom</string>
     <string name="clear_search">Clear search</string>
+    <string name="recent_searches">Search history</string>
+    <string name="clear_search_history">Clear</string>
+    <string name="remove_search_history_entry">Remove from history</string>
     <string name="article_return_to_search">Return to search</string>
     <string name="error_checking_dictionaries">Failed to check dictionary status</string>
     <string name="error_loading_article">Loading error: %1$s</string>
@@ -74,7 +80,7 @@
     <string name="dictionary_source_duplicate_in_form">Duplicate URL in the form</string>
     <string name="dictionary_source_duplicate_prefix">This dictionary already exists</string>
     <string name="dictionary_source_url_empty">URL cannot be empty</string>
-    <string name="dictionary_source_invalid_protocol">Must start with http:// or https://</string>
+    <string name="dictionary_source_invalid_protocol">Must start with https://</string>
     <string name="dictionary_source_invalid_extension">Must end with .gz, .dsl, or .dsl.dz</string>
     <string name="dictionary_source_too_long">URL is too long (max 2048 characters)</string>
     <string name="dictionary_source_invalid_url">Invalid URL format</string>