Refactor and cleanup UI and storage components

Refactored TokenStorage to lazily initialize EncryptedSharedPreferences, improving initialization safety. Removed unused variables and imports from MaskedEmailCard and CreateMaskedEmailScreen. Simplified error display logic in MaskedEmailDetailScreen. Updated MaskedEmailListScreen to use AutoMirrored Logout icon for better RTL support.

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

@@ -12,17 +12,19 @@ import javax.inject.Singleton
 class TokenStorage @Inject constructor(
     @ApplicationContext private val context: Context
 ) {
-    private val masterKey = MasterKey.Builder(context)
+    private val sharedPreferences: SharedPreferences by lazy {
+        val masterKey = MasterKey.Builder(context)
             .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
             .build()
 
-    private val sharedPreferences: SharedPreferences = EncryptedSharedPreferences.create(
+        EncryptedSharedPreferences.create(
             context,
             PREFS_FILE_NAME,
             masterKey,
             EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
             EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
         )
+    }
 
     fun saveToken(token: String) {
         sharedPreferences.edit().putString(KEY_API_TOKEN, token).apply()

app/src/main/java/com/fastmask/ui/components/MaskedEmailCard.kt

@@ -49,7 +49,6 @@ fun MaskedEmailCard(
     modifier: Modifier = Modifier
 ) {
     val haptic = LocalHapticFeedback.current
-    val statusColors = FastMaskStatusColors.current
 
     val stateDescription = when (maskedEmail.state) {
         EmailState.ENABLED -> "Enabled"

app/src/main/java/com/fastmask/ui/create/CreateMaskedEmailScreen.kt

@@ -36,7 +36,6 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.hapticfeedback.HapticFeedbackType
@@ -48,7 +47,6 @@ import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import com.fastmask.domain.model.EmailState
 import kotlinx.coroutines.flow.collectLatest
-import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -59,7 +57,6 @@ fun CreateMaskedEmailScreen(
     val uiState by viewModel.uiState.collectAsState()
     val context = LocalContext.current
     val snackbarHostState = remember { SnackbarHostState() }
-    val scope = rememberCoroutineScope()
     val haptic = LocalHapticFeedback.current
 
     LaunchedEffect(Unit) {

app/src/main/java/com/fastmask/ui/detail/MaskedEmailDetailScreen.kt

@@ -475,10 +475,10 @@ private fun EmailDetailContent(
                 enabled = !uiState.isUpdating
             )
 
-            if (uiState.error != null) {
+            uiState.error?.let { error ->
                 Spacer(modifier = Modifier.height(16.dp))
                 Text(
-                    text = uiState.error!!,
+                    text = error,
                     color = MaterialTheme.colorScheme.error,
                     style = MaterialTheme.typography.bodyMedium
                 )

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

@@ -21,7 +21,7 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.Close
 import androidx.compose.material.icons.filled.FilterList
-import androidx.compose.material.icons.filled.Logout
+import androidx.compose.material.icons.automirrored.filled.Logout
 import androidx.compose.material.icons.filled.Search
 import androidx.compose.material3.DropdownMenu
 import androidx.compose.material3.DropdownMenuItem
@@ -140,7 +140,7 @@ fun MaskedEmailListScreen(
                         }
                     ) {
                         Icon(
-                            imageVector = Icons.Default.Logout,
+                            imageVector = Icons.AutoMirrored.Filled.Logout,
                             contentDescription = null
                         )
                     }