fix(ui): drop redundant stop-sharing UI and fix username field

Remove the transfer-details progress bar and Stop sharing control now that
delete already revokes a share. Fix preferences username typing by keeping
local draft state and debouncing DataStore writes so trim/races no longer
fight the caret.

shared/src/commonMain/kotlin/com/vnidrop/app/feature/send/SendRoute.kt

@@ -53,6 +53,5 @@ fun SendRoute(
 		onRequestDelete = viewModel::requestDeleteTransfer,
 		onDismissDelete = viewModel::dismissDeleteTransfer,
 		onConfirmDelete = viewModel::confirmDeleteTransfer,
-		onCancelTransfer = viewModel::cancelSelectedTransfer,
 	)
 }

shared/src/commonMain/kotlin/com/vnidrop/app/feature/send/SendScreen.kt

@@ -14,8 +14,6 @@ import com.vnidrop.app.core.ShareAccessPolicy
 import com.vnidrop.app.core.TransferDirection
 import com.vnidrop.app.ui.components.AdaptiveDrawer
 import com.vnidrop.app.ui.state.WindowClass
-import com.vnidrop.app.ui.state.canCancelTransfer
-import com.vnidrop.app.ui.state.progressForTransfer
 
 @Composable
 fun SendScreen(
@@ -42,7 +40,6 @@ fun SendScreen(
 	onRequestDelete: () -> Unit = {},
 	onDismissDelete: () -> Unit = {},
 	onConfirmDelete: () -> Unit = {},
-	onCancelTransfer: () -> Unit = {},
 ) {
 	val outgoingTransfers = coreState.transfers.filter { it.direction == TransferDirection.Send }
 	val selectedTransfer = state.selectedTransferId?.let { id -> outgoingTransfers.firstOrNull { it.transferId == id } }
@@ -56,18 +53,15 @@ fun SendScreen(
 			TransferDetails(
 				transfer = selectedTransfer,
 				events = coreState.events,
-				progress = progressForTransfer(coreState.events, selectedTransfer.transferId),
 				pendingReceivers = state.receiverHistory.count {
 					it.status == ReceiverDeliveryStatus.Requested || it.status == ReceiverDeliveryStatus.Accepted
 				},
 				completedReceivers = state.receiverHistory.count { it.status == ReceiverDeliveryStatus.Completed },
-				canCancel = selectedTransfer.canCancelTransfer(),
 				onBack = onCloseTransferDetails,
 				onActivity = onActivity,
 				onReceivers = onReceivers,
 				onShare = onShare,
 				onDelete = onRequestDelete,
-				onCancel = onCancelTransfer,
 			)
 		} else {
 			TransferCatalog(

shared/src/commonMain/kotlin/com/vnidrop/app/feature/send/SendViewModel.kt

@@ -25,7 +25,6 @@ import kotlinx.coroutines.launch
 import vnidrop.shared.generated.resources.Res
 import vnidrop.shared.generated.resources.send_transfer_created
 import vnidrop.shared.generated.resources.transfer_deleted
-import vnidrop.shared.generated.resources.transfer_event_stopped
 import vnidrop.shared.generated.resources.transfer_nfc_written
 
 data class SendState(
@@ -252,21 +251,6 @@ class SendViewModel(
 		}
 	}
 
-	fun cancelSelectedTransfer() {
-		val transferId = _state.value.selectedTransferId ?: return
-		viewModelScope.launch {
-			repository.cancel(transferId).fold(
-				onSuccess = {
-					repository.refresh()
-					messages.tryShow(
-						UiMessage(UiText.Resource(Res.string.transfer_event_stopped), UiMessageTone.Info),
-					)
-				},
-				onFailure = messages::error,
-			)
-		}
-	}
-
 	private fun sendEffect(effect: SendEffect) {
 		viewModelScope.launch { effects.send(effect) }
 	}

shared/src/commonMain/kotlin/com/vnidrop/app/feature/send/TransferDetails.kt

@@ -50,9 +50,7 @@ import com.vnidrop.app.core.Transfer
 import com.vnidrop.app.ui.components.AppCard
 import com.vnidrop.app.ui.components.DestructiveButton
 import com.vnidrop.app.ui.components.PrimaryButton
-import com.vnidrop.app.ui.components.ProgressRow
 import com.vnidrop.app.ui.components.SecondaryButton
-import com.vnidrop.app.ui.state.TransferProgress
 import com.vnidrop.app.ui.state.displayNameForStatus
 import com.vnidrop.app.ui.state.formatBytes
 import com.vnidrop.app.ui.theme.LocalVniDropColors
@@ -69,16 +67,13 @@ enum class InvitationAction { Export, Share, Nfc }
 internal fun TransferDetails(
 	transfer: Transfer,
 	events: List<CoreEventModel>,
-	progress: TransferProgress? = null,
 	pendingReceivers: Int = 0,
 	completedReceivers: Int,
-	canCancel: Boolean = false,
 	onBack: () -> Unit,
 	onActivity: () -> Unit,
 	onReceivers: () -> Unit,
 	onShare: () -> Unit,
 	onDelete: () -> Unit,
-	onCancel: () -> Unit = {},
 ) {
 	LazyColumn(
 		modifier = Modifier.fillMaxSize().statusBarsPadding(),
@@ -106,24 +101,6 @@ internal fun TransferDetails(
 				DetailValue(stringResource(Res.string.metadata_size), formatBytes(transfer.totalSize))
 				HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
 				DetailValue(stringResource(Res.string.send_access_title), accessPolicyLabel(transfer.accessPolicy))
-				if (progress != null && transfer.status.isLiveProgressStatus()) {
-					HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
-					ProgressRow(
-						label = progress.label,
-						progress = progress.progress,
-						detail = progress.detail,
-						modifier = Modifier.padding(top = 8.dp),
-					)
-				}
-			}
-		}
-		if (canCancel) {
-			item {
-				SecondaryButton(
-					stringResource(Res.string.button_stop_sharing),
-					onClick = onCancel,
-					modifier = Modifier.fillMaxWidth(),
-				)
 			}
 		}
 		item {
@@ -163,11 +140,6 @@ private fun receiversDescription(pending: Int, completed: Int): String = when {
 	else -> stringResource(Res.string.transfer_receivers_description)
 }
 
-private fun com.vnidrop.app.core.TransferStatus.isLiveProgressStatus(): Boolean =
-	this == com.vnidrop.app.core.TransferStatus.Importing ||
-		this == com.vnidrop.app.core.TransferStatus.Sharing ||
-		this == com.vnidrop.app.core.TransferStatus.Receiving
-
 @Composable
 private fun DetailDestination(title: String, description: String, count: Int? = null, onClick: () -> Unit) {
 	Row(

shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/SettingsViewModel.kt

@@ -16,8 +16,10 @@ import com.vnidrop.app.ui.feedback.UiMessageController
 import com.vnidrop.app.ui.feedback.UiMessageTone
 import com.vnidrop.app.ui.feedback.UiText
 import com.vnidrop.app.ui.theme.ThemeMode
+import kotlinx.coroutines.Job
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
@@ -71,21 +73,28 @@ class SettingsViewModel(
 	private val effects = Channel<SettingsEffect>(Channel.BUFFERED)
 	val effectFlow = effects.receiveAsFlow()
 	private var enableNotificationsAfterSettings = false
+	private var usernamePersistJob: Job? = null
 
 	init {
 		viewModelScope.launch {
 			preferencesRepository.preferences.collect { preferences ->
-				_state.update {
+				val previousFolder = _state.value.receiveFolder
-					it.copy(
+				// While the user is typing, keep the in-progress value. DataStore
-						username = preferences.username,
+				// echoes can race keystrokes and trim trailing spaces mid-edit.
+				val editingUsername = usernamePersistJob?.isActive == true
+				_state.update { current ->
+					current.copy(
+						username = if (editingUsername) current.username else preferences.username,
 						receiveFolder = preferences.receiveFolder,
 						themeMode = preferences.themeMode,
 						notificationsEnabled = preferences.notificationsEnabled,
 					)
 				}
+				if (preferences.receiveFolder != previousFolder) {
 					validateFolder(preferences.receiveFolder)
 				}
 			}
+		}
 		refreshNotificationPermission()
 		loadDeviceInfo()
 	}
@@ -96,7 +105,12 @@ class SettingsViewModel(
 	}
 
 	fun setUsername(value: String) {
-		viewModelScope.launch { preferencesRepository.setUsername(value) }
+		_state.update { it.copy(username = value) }
+		usernamePersistJob?.cancel()
+		usernamePersistJob = viewModelScope.launch {
+			delay(UsernamePersistDebounceMs)
+			preferencesRepository.setUsername(value)
+		}
 	}
 
 	fun setThemeMode(mode: ThemeMode) {
@@ -203,4 +217,8 @@ class SettingsViewModel(
 		val status = fileSystemService.validateReceiveFolder(folder)
 		_state.update { it.copy(folderAccessStatus = status, isValidatingFolder = false) }
 	}
+
+	private companion object {
+		const val UsernamePersistDebounceMs = 350L
+	}
 }

shared/src/commonTest/kotlin/com/vnidrop/app/feature/ViewModelsTest.kt

@@ -80,6 +80,31 @@ class ViewModelsTest {
 		assertEquals(1, notifications.cancelAllCount)
 	}
 
+	@Test
+	fun settingsUsernameKeepsSpacesWhileTypingAndPersistsAfterDebounce() = runTest {
+		Dispatchers.setMain(StandardTestDispatcher(testScheduler))
+		val preferences = preferences()
+		val viewModel = SettingsViewModel(
+			environment(),
+			{ DeviceInfo("Device", null, "OS", null, null) },
+			FakeFileSystemService(folder),
+			preferences,
+			FakeNotificationService(),
+			UiMessageController(),
+		)
+		advanceUntilIdle()
+
+		viewModel.setUsername("Ada ")
+		// Immediate local state must keep the trailing space so multi-word names can be typed.
+		assertEquals("Ada ", viewModel.state.value.username)
+		assertEquals("Receiver", preferences.mutablePreferences.value.username)
+
+		testScheduler.advanceTimeBy(400)
+		advanceUntilIdle()
+		assertEquals("Ada", preferences.mutablePreferences.value.username)
+		assertEquals("Ada", viewModel.state.value.username)
+	}
+
 	@Test
 	fun settingsKeepsNotificationsDisabledWhenPermissionIsDenied() = runTest {
 		Dispatchers.setMain(StandardTestDispatcher(testScheduler))

shared/src/commonTest/kotlin/com/vnidrop/app/support/Fakes.kt

@@ -169,7 +169,9 @@ class FakePreferencesRepository(
 ) : PreferencesRepository {
 	val mutablePreferences = MutableStateFlow(initial)
 	override val preferences = mutablePreferences
-	override suspend fun setUsername(username: String) { mutablePreferences.value = mutablePreferences.value.copy(username = username) }
+	override suspend fun setUsername(username: String) {
+		mutablePreferences.value = mutablePreferences.value.copy(username = username.trim())
+	}
 	override suspend fun setReceiveFolder(folder: ReceiveFolder) { mutablePreferences.value = mutablePreferences.value.copy(receiveFolder = folder) }
 	override suspend fun resetReceiveFolder() = Unit
 	override suspend fun setThemeMode(mode: ThemeMode) { mutablePreferences.value = mutablePreferences.value.copy(themeMode = mode) }