Release v1.3: Fix choppy navigation and language persistence

- Simplify navigation animations (slide-only, 220ms, FastOutSlowInEasing)
- Add soft refresh to prevent shimmer when returning from Settings
- Move language restoration to Application class for reliable persistence
- Fix theme parent to AppCompat.DayNight for proper locale support
- Delay refresh 250ms to complete navigation animation smoothly

README.md

@@ -196,6 +196,10 @@ Contributions are welcome! Here's how you can help:
 - **New**: Localization support for 20 languages (English, Chinese, Spanish, Hindi, Arabic, Portuguese, Bengali, Russian, Japanese, French, German, Korean, Italian, Turkish, Vietnamese, Polish, Ukrainian, Dutch, Thai, Indonesian)
 - **New**: In-app language override using AppCompatDelegate
 - **Improved**: All UI strings now use centralized string resources
+- **Fixed**: Choppy navigation transitions between Settings and List screens
+- **Fixed**: Language preference now persists correctly across app restarts
+- **Improved**: Navigation animations simplified (slide-only, 220ms with FastOutSlowInEasing)
+- **Improved**: Soft refresh prevents shimmer loading when returning from Settings
 
 ### v1.2 (January 2026)
 - **Fixed**: Login crash caused by `ParameterizedType` casting error at runtime

app/build.gradle.kts

@@ -14,8 +14,8 @@ android {
         applicationId = "com.fastmask"
         minSdk = 26
         targetSdk = 34
-        versionCode = 3
+        versionCode = 4
-        versionName = "1.2"
+        versionName = "1.3"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {

app/src/main/java/com/fastmask/FastMaskApplication.kt

@@ -1,7 +1,30 @@
 package com.fastmask
 
 import android.app.Application
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.os.LocaleListCompat
+import com.fastmask.data.local.SettingsDataStore
 import dagger.hilt.android.HiltAndroidApp
 
 @HiltAndroidApp
-class FastMaskApplication : Application()
+class FastMaskApplication : Application() {
+
+    override fun onCreate() {
+        super.onCreate()
+        // Restore saved language after super.onCreate() but before any Activity starts.
+        // We read directly from DataStore here since Hilt injection happens during super.onCreate().
+        restoreSavedLanguage()
+    }
+
+    private fun restoreSavedLanguage() {
+        try {
+            val savedLanguageCode = SettingsDataStore.getLanguageBlocking(this)
+            if (savedLanguageCode != null) {
+                val localeList = LocaleListCompat.forLanguageTags(savedLanguageCode)
+                AppCompatDelegate.setApplicationLocales(localeList)
+            }
+        } catch (e: Exception) {
+            // If reading fails, use system default locale
+        }
+    }
+}

app/src/main/java/com/fastmask/MainActivity.kt

@@ -4,15 +4,12 @@ import android.os.Bundle
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
-import androidx.appcompat.app.AppCompatDelegate
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.ui.Modifier
-import androidx.core.os.LocaleListCompat
 import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
 import androidx.navigation.compose.rememberNavController
-import com.fastmask.data.local.SettingsDataStore
 import com.fastmask.domain.repository.AuthRepository
 import com.fastmask.ui.navigation.FastMaskNavHost
 import com.fastmask.ui.navigation.NavRoutes
@@ -26,15 +23,9 @@ class MainActivity : AppCompatActivity() {
     @Inject
     lateinit var authRepository: AuthRepository
 
-    @Inject
-    lateinit var settingsDataStore: SettingsDataStore
-
     private var isReady = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
-        // Restore saved language before anything else
-        restoreSavedLanguage()
-
         val splashScreen = installSplashScreen()
         super.onCreate(savedInstanceState)
 
@@ -65,12 +56,4 @@ class MainActivity : AppCompatActivity() {
             }
         }
     }
-
-    private fun restoreSavedLanguage() {
-        val savedLanguageCode = settingsDataStore.getLanguageBlocking()
-        if (savedLanguageCode != null) {
-            val localeList = LocaleListCompat.forLanguageTags(savedLanguageCode)
-            AppCompatDelegate.setApplicationLocales(localeList)
-        }
-    }
 }

app/src/main/java/com/fastmask/data/local/SettingsDataStore.kt

@@ -14,7 +14,7 @@ import kotlinx.coroutines.runBlocking
 import javax.inject.Inject
 import javax.inject.Singleton
 
-private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "settings")
+val Context.settingsDataStore: DataStore<Preferences> by preferencesDataStore(name = "settings")
 
 @Singleton
 class SettingsDataStore @Inject constructor(
@@ -22,12 +22,12 @@ class SettingsDataStore @Inject constructor(
 ) {
     private val languageKey = stringPreferencesKey("language_code")
 
-    val languageFlow: Flow<String?> = context.dataStore.data.map { preferences ->
+    val languageFlow: Flow<String?> = context.settingsDataStore.data.map { preferences ->
         preferences[languageKey]
     }
 
     suspend fun setLanguage(languageCode: String?) {
-        context.dataStore.edit { preferences ->
+        context.settingsDataStore.edit { preferences ->
             if (languageCode == null) {
                 preferences.remove(languageKey)
             } else {
@@ -38,7 +38,17 @@ class SettingsDataStore @Inject constructor(
 
     fun getLanguageBlocking(): String? {
         return runBlocking {
-            context.dataStore.data.first()[languageKey]
+            context.settingsDataStore.data.first()[languageKey]
+        }
+    }
+
+    companion object {
+        private val LANGUAGE_KEY = stringPreferencesKey("language_code")
+
+        fun getLanguageBlocking(context: Context): String? {
+            return runBlocking {
+                context.settingsDataStore.data.first()[LANGUAGE_KEY]
+            }
         }
     }
 }

app/src/main/java/com/fastmask/ui/list/MaskedEmailListScreen.kt

@@ -46,6 +46,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
+import kotlinx.coroutines.delay
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.compose.LocalLifecycleOwner
 import androidx.lifecycle.repeatOnLifecycle
@@ -95,10 +96,12 @@ fun MaskedEmailListScreen(
     val createDesc = stringResource(R.string.email_list_create_description)
 
     // Refresh the list when the screen resumes (e.g., after creating a new email)
+    // Delay refresh to allow navigation animation to complete smoothly
     val lifecycleOwner = LocalLifecycleOwner.current
     LaunchedEffect(lifecycleOwner) {
         lifecycleOwner.lifecycle.repeatOnLifecycle(Lifecycle.State.RESUMED) {
-            viewModel.loadMaskedEmails()
+            delay(250L)
+            viewModel.refreshMaskedEmails()
         }
     }
 

app/src/main/java/com/fastmask/ui/list/MaskedEmailListViewModel.kt

@@ -63,6 +63,44 @@ class MaskedEmailListViewModel @Inject constructor(
         }
     }
 
+    fun refreshMaskedEmails() {
+        viewModelScope.launch {
+            // Don't show loading if we already have data (soft refresh)
+            if (_uiState.value.emails.isEmpty()) {
+                _uiState.update { it.copy(isLoading = true, error = null) }
+            }
+
+            getMaskedEmailsUseCase().fold(
+                onSuccess = { emails ->
+                    _uiState.update {
+                        it.copy(
+                            isLoading = false,
+                            emails = emails.sortedByDescending { email -> email.createdAt },
+                            filteredEmails = filterEmails(
+                                emails,
+                                it.searchQuery,
+                                it.selectedFilter
+                            )
+                        )
+                    }
+                },
+                onFailure = { error ->
+                    // Only show error if we have no data
+                    if (_uiState.value.emails.isEmpty()) {
+                        _uiState.update {
+                            it.copy(
+                                isLoading = false,
+                                error = error.message ?: "Failed to load emails"
+                            )
+                        }
+                    } else {
+                        _uiState.update { it.copy(isLoading = false) }
+                    }
+                }
+            )
+        }
+    }
+
     fun onSearchQueryChange(query: String) {
         _uiState.update {
             it.copy(

app/src/main/java/com/fastmask/ui/navigation/FastMaskNavHost.kt

@@ -3,6 +3,7 @@ package com.fastmask.ui.navigation
 import androidx.compose.animation.AnimatedContentTransitionScope
 import androidx.compose.animation.ExperimentalSharedTransitionApi
 import androidx.compose.animation.SharedTransitionLayout
+import androidx.compose.animation.core.FastOutSlowInEasing
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
@@ -19,7 +20,7 @@ import com.fastmask.ui.detail.MaskedEmailDetailScreen
 import com.fastmask.ui.list.MaskedEmailListScreen
 import com.fastmask.ui.settings.SettingsScreen
 
-private const val TRANSITION_DURATION_MS = 300
+private const val TRANSITION_DURATION_MS = 220
 
 @OptIn(ExperimentalSharedTransitionApi::class)
 @Composable
@@ -36,26 +37,26 @@ fun FastMaskNavHost(
             enterTransition = {
                 slideIntoContainer(
                     towards = AnimatedContentTransitionScope.SlideDirection.Start,
-                    animationSpec = tween(TRANSITION_DURATION_MS)
+                    animationSpec = tween(TRANSITION_DURATION_MS, easing = FastOutSlowInEasing)
-                ) + fadeIn(animationSpec = tween(TRANSITION_DURATION_MS))
+                )
             },
             exitTransition = {
                 slideOutOfContainer(
                     towards = AnimatedContentTransitionScope.SlideDirection.Start,
-                    animationSpec = tween(TRANSITION_DURATION_MS)
+                    animationSpec = tween(TRANSITION_DURATION_MS, easing = FastOutSlowInEasing)
-                ) + fadeOut(animationSpec = tween(TRANSITION_DURATION_MS))
+                )
             },
             popEnterTransition = {
                 slideIntoContainer(
                     towards = AnimatedContentTransitionScope.SlideDirection.End,
-                    animationSpec = tween(TRANSITION_DURATION_MS)
+                    animationSpec = tween(TRANSITION_DURATION_MS, easing = FastOutSlowInEasing)
-                ) + fadeIn(animationSpec = tween(TRANSITION_DURATION_MS))
+                )
             },
             popExitTransition = {
                 slideOutOfContainer(
                     towards = AnimatedContentTransitionScope.SlideDirection.End,
-                    animationSpec = tween(TRANSITION_DURATION_MS)
+                    animationSpec = tween(TRANSITION_DURATION_MS, easing = FastOutSlowInEasing)
-                ) + fadeOut(animationSpec = tween(TRANSITION_DURATION_MS))
+                )
             }
         ) {
             composable(

app/src/main/res/values-v31/themes.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="Theme.FastMask" parent="android:Theme.Material.Light.NoActionBar">
+    <style name="Theme.FastMask" parent="Theme.AppCompat.DayNight.NoActionBar">
         <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:navigationBarColor">@android:color/transparent</item>
         <item name="android:windowLightStatusBar">true</item>

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="Theme.FastMask" parent="android:Theme.Material.Light.NoActionBar">
+    <style name="Theme.FastMask" parent="Theme.AppCompat.DayNight.NoActionBar">
         <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:navigationBarColor">@android:color/transparent</item>
         <item name="android:windowLightStatusBar">true</item>