feat(send): multi-file shares and receivers polish

Allow selecting multiple files on Android, desktop, and iOS and share them
as one transfer through the core multi-source path. Update the composer UI
for multi-file review, hide unfinished iOS receive methods, and surface
refusal reasons on the receivers list.

shared/src/androidMain/kotlin/com/vnidrop/app/core/FilePicker.android.kt

@@ -16,18 +16,22 @@ import androidx.compose.ui.platform.LocalContext
 
 @Composable
 actual fun rememberShareFilePicker(
-	onFilePicked: (PickedShareFile) -> Unit,
+	onFilesPicked: (List<PickedShareFile>) -> Unit,
 	onError: (String) -> Unit,
 ): ShareFilePicker {
 	val context = LocalContext.current
-	val launcher = rememberLauncherForActivityResult(ActivityResultContracts.OpenDocument()) { uri ->
+	val launcher = rememberLauncherForActivityResult(ActivityResultContracts.OpenMultipleDocuments()) { uris ->
-		if (uri != null) {
+		if (uris.isEmpty()) return@rememberLauncherForActivityResult
-			onFilePicked(context.pickedShareFile(uri))
+		runCatching {
-		}
+			uris.map { uri -> context.pickedShareFile(uri) }
+		}.fold(
+			onSuccess = onFilesPicked,
+			onFailure = { onError(it.message ?: "Could not open the selected files") },
+		)
 	}
 	return remember(launcher) {
 		object : ShareFilePicker {
-			override fun pickFile() {
+			override fun pickFiles() {
 				launcher.launch(arrayOf("*/*"))
 			}
 		}

shared/src/androidMain/kotlin/com/vnidrop/app/core/FileSystemService.android.kt

@@ -63,22 +63,30 @@ private class AndroidFileSystemService(
 			ReceiveFolderKind.IosSecurityScopedUrl -> null
 		}
 
-	override suspend fun sharePickedFile(
+	override suspend fun sharePickedFiles(
 		repository: CoreGateway,
-		file: PickedShareFile,
+		files: List<PickedShareFile>,
 		transferName: String,
 		senderName: String,
 		accessPolicy: ShareAccessPolicy,
 	): Result<Share> = runCatching {
-		context.contentResolver.openFileDescriptor(Uri.parse(file.value), "r").use { descriptor ->
+		require(files.isNotEmpty()) { "Select at least one file to share" }
-			checkNotNull(descriptor) { "Could not open selected file descriptor" }
+		val descriptors = files.map { file ->
-			repository.shareFileDescriptor(
+			context.contentResolver.openFileDescriptor(Uri.parse(file.value), "r")
-				fd = descriptor.fd,
+				?: error("Could not open selected file descriptor for ${file.displayName}")
-				displayName = file.displayName,
+		}
-				transferName = transferName,
+		try {
-				senderName = senderName,
+			val sources = files.zip(descriptors) { file, descriptor ->
-				accessPolicy = accessPolicy,
+				uniffi.vnidrop.ShareSource(
-			).getOrThrow()
+					kind = uniffi.vnidrop.SourceKind.FILE_DESCRIPTOR,
+					value = descriptor.fd.toString(),
+					displayName = file.displayName,
+					isDirectory = false,
+				)
+			}
+			repository.shareSources(sources, transferName, senderName, accessPolicy).getOrThrow()
+		} finally {
+			descriptors.forEach { it.close() }
 		}
 	}
 

shared/src/commonMain/composeResources/values/strings.xml

@@ -10,7 +10,11 @@
     <string name="send_transfers_title">Your transfers</string>
     <string name="send_new_transfer_title">New transfer</string>
     <string name="send_choose_file_title">Choose what to share</string>
-    <string name="send_choose_file_body">Select one file from this device. You can review its details before creating the transfer.</string>
+    <string name="send_choose_file_body">Select one or more files from this device. You can review them before creating the transfer.</string>
+    <string name="send_selected_files_count">%1$d files selected</string>
+    <string name="button_remove_file">Remove file</string>
+    <string name="button_choose_files">Choose files</string>
+    <string name="button_change_files">Change files</string>
     <string name="send_review_title">Review transfer</string>
     <string name="send_access_title">Who can receive it?</string>
     <string name="send_access_approval">Ask before each download</string>
@@ -58,7 +62,7 @@
     <string name="transfer_event_updated">Transfer updated</string>
     <string name="button_choose_file">Choose file</string>
     <string name="button_change_file">Change file</string>
-    <string name="button_share_file">Share file</string>
+    <string name="button_share_file">Share files</string>
     <string name="button_sharing_file">Preparing transfer…</string>
     <string name="button_copy_ticket">Copy transfer link</string>
     <string name="send_new_transfer_description">Create a new transfer</string>

shared/src/commonMain/kotlin/com/vnidrop/app/core/CoreModels.kt

@@ -142,6 +142,13 @@ interface CoreGateway {
 		senderName: String,
 		accessPolicy: ShareAccessPolicy,
 	): Result<Share>
+	/** Multi-source share used by multi-file pickers. */
+	suspend fun shareSources(
+		sources: List<uniffi.vnidrop.ShareSource>,
+		transferName: String,
+		senderName: String,
+		accessPolicy: ShareAccessPolicy,
+	): Result<Share>
 	suspend fun inspectTicket(ticket: String): Result<TicketInspectionModel>
 	suspend fun receive(ticket: String, outputDir: String, receiverName: String): Result<Unit>
 	suspend fun receiveWithOutputSink(ticket: String, outputSink: ReceiveOutputSink, receiverName: String): Result<Unit>

shared/src/commonMain/kotlin/com/vnidrop/app/core/CoreRepository.kt

@@ -197,12 +197,13 @@ class CoreRepository(
 
 	override suspend fun refresh(): Result<Unit> = runCore { refreshSnapshot() }
 
-	private suspend fun shareSources(
+	override suspend fun shareSources(
 		sources: List<ShareSource>,
 		transferName: String,
 		senderName: String,
 		accessPolicy: ShareAccessPolicy,
 	): Result<Share> = runCore {
+		require(sources.isNotEmpty()) { "Select at least one file to share" }
 		withPlatformPathAccess(sources) {
 			requireCore().shareFiles(
 				sources = sources,

shared/src/commonMain/kotlin/com/vnidrop/app/core/FilePicker.kt

@@ -10,7 +10,8 @@ data class PickedShareFile(
 )
 
 interface ShareFilePicker {
-	fun pickFile()
+	/** Opens a platform picker that may return one or more files. */
+	fun pickFiles()
 }
 
 interface ReceiveFolderPicker {
@@ -19,7 +20,7 @@ interface ReceiveFolderPicker {
 
 @Composable
 expect fun rememberShareFilePicker(
-	onFilePicked: (PickedShareFile) -> Unit,
+	onFilesPicked: (List<PickedShareFile>) -> Unit,
 	onError: (String) -> Unit,
 ): ShareFilePicker
 

shared/src/commonMain/kotlin/com/vnidrop/app/core/FileSystemService.kt

@@ -36,6 +36,14 @@ interface FileSystemService {
 		transferName: String,
 		senderName: String,
 		accessPolicy: ShareAccessPolicy,
+	): Result<Share> = sharePickedFiles(repository, listOf(file), transferName, senderName, accessPolicy)
+
+	suspend fun sharePickedFiles(
+		repository: CoreGateway,
+		files: List<PickedShareFile>,
+		transferName: String,
+		senderName: String,
+		accessPolicy: ShareAccessPolicy,
 	): Result<Share>
 }
 

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

@@ -17,13 +17,13 @@ fun SendRoute(
 	val state by viewModel.state.collectAsStateWithLifecycle()
 	val coreState by viewModel.coreState.collectAsStateWithLifecycle()
 	val clipboard = LocalClipboardManager.current
-	val picker = rememberShareFilePicker(viewModel::onFilePicked, viewModel::onFilePickFailed)
+	val picker = rememberShareFilePicker(viewModel::onFilesPicked, viewModel::onFilePickFailed)
 	val shareActions = rememberTransferShareActions()
 
 	LaunchedEffect(viewModel) {
 		viewModel.effectFlow.collect { effect ->
 			when (effect) {
-				SendEffect.OpenFilePicker -> picker.pickFile()
+				SendEffect.OpenFilePicker -> picker.pickFiles()
 				is SendEffect.CopyTicket -> clipboard.setText(AnnotatedString(effect.ticket))
 			}
 		}
@@ -38,6 +38,7 @@ fun SendRoute(
 		onDismissComposer = viewModel::dismissComposer,
 		onSelectFile = viewModel::selectFile,
 		onClearFile = viewModel::clearSelectedSource,
+		onRemoveFile = viewModel::removeSelectedFile,
 		onTransferNameChanged = viewModel::setTransferName,
 		onSenderNameChanged = viewModel::setSenderName,
 		onAccessPolicyChanged = viewModel::setAccessPolicy,

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

@@ -25,6 +25,7 @@ fun SendScreen(
 	onDismissComposer: () -> Unit,
 	onSelectFile: () -> Unit,
 	onClearFile: () -> Unit,
+	onRemoveFile: (String) -> Unit = {},
 	onTransferNameChanged: (String) -> Unit,
 	onSenderNameChanged: (String) -> Unit,
 	onAccessPolicyChanged: (ShareAccessPolicy) -> Unit,
@@ -83,6 +84,7 @@ fun SendScreen(
 				windowClass = windowClass,
 				onSelectFile = onSelectFile,
 				onClearFile = onClearFile,
+				onRemoveFile = onRemoveFile,
 				onTransferNameChanged = onTransferNameChanged,
 				onSenderNameChanged = onSenderNameChanged,
 				onAccessPolicyChanged = onAccessPolicyChanged,

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

@@ -29,7 +29,7 @@ import vnidrop.shared.generated.resources.transfer_nfc_written
 
 data class SendState(
 	val isComposerOpen: Boolean = false,
-	val selectedFile: PickedShareFile? = null,
+	val selectedFiles: List<PickedShareFile> = emptyList(),
 	val transferName: String = "",
 	val senderName: String = "",
 	val accessPolicy: ShareAccessPolicy = ShareAccessPolicy.RequireApproval,
@@ -42,8 +42,12 @@ data class SendState(
 	val isDeleteConfirmationOpen: Boolean = false,
 	val isDeleting: Boolean = false,
 ) {
+	val selectedFile: PickedShareFile? get() = selectedFiles.singleOrNull()
+	val totalSelectedBytes: ULong
+		get() = selectedFiles.fold(0UL) { acc, file -> acc + (file.sizeBytes ?: 0UL) }
+
 	fun canCreateShare(coreInitialized: Boolean): Boolean =
-		coreInitialized && selectedFile != null && transferName.isNotBlank() && !isSharing
+		coreInitialized && selectedFiles.isNotEmpty() && transferName.isNotBlank() && !isSharing
 }
 
 enum class TransferDetailPanel { Activity, Receivers, Share }
@@ -111,7 +115,7 @@ class SendViewModel(
 		_state.update {
 			it.copy(
 				isComposerOpen = true,
-				selectedFile = null,
+				selectedFiles = emptyList(),
 				transferName = "",
 				accessPolicy = ShareAccessPolicy.RequireApproval,
 			)
@@ -123,7 +127,7 @@ class SendViewModel(
 		_state.update {
 			it.copy(
 				isComposerOpen = false,
-				selectedFile = null,
+				selectedFiles = emptyList(),
 				transferName = "",
 				accessPolicy = ShareAccessPolicy.RequireApproval,
 			)
@@ -132,12 +136,13 @@ class SendViewModel(
 
 	fun selectFile() = sendEffect(SendEffect.OpenFilePicker)
 
-	fun onFilePicked(file: PickedShareFile) {
+	fun onFilesPicked(files: List<PickedShareFile>) {
+		if (files.isEmpty()) return
 		_state.update {
 			it.copy(
 				isComposerOpen = true,
-				selectedFile = file,
+				selectedFiles = files,
-				transferName = file.displayName,
+				transferName = defaultTransferName(files),
 			)
 		}
 	}
@@ -145,7 +150,21 @@ class SendViewModel(
 	fun onFilePickFailed(reason: String) = messages.error(IllegalStateException(reason))
 
 	fun clearSelectedSource() {
-		_state.update { it.copy(selectedFile = null, transferName = "") }
+		_state.update { it.copy(selectedFiles = emptyList(), transferName = "") }
+	}
+
+	fun removeSelectedFile(value: String) {
+		_state.update { current ->
+			val remaining = current.selectedFiles.filterNot { it.value == value }
+			current.copy(
+				selectedFiles = remaining,
+				transferName = when {
+					remaining.isEmpty() -> ""
+					current.transferName == defaultTransferName(current.selectedFiles) -> defaultTransferName(remaining)
+					else -> current.transferName
+				},
+			)
+		}
 	}
 
 	fun setTransferName(value: String) = _state.update { it.copy(transferName = value) }
@@ -218,24 +237,25 @@ class SendViewModel(
 
 	fun createShare() {
 		val current = state.value
-		val file = current.selectedFile ?: return
+		if (current.selectedFiles.isEmpty()) return
 		if (!current.canCreateShare(coreState.value.isInitialized)) return
 		viewModelScope.launch {
 			_state.update { it.copy(isSharing = true) }
-			val result = fileSystemService.sharePickedFile(
+			val result = fileSystemService.sharePickedFiles(
 				repository = repository,
-				file = file,
+				files = current.selectedFiles,
 				transferName = current.transferName.trim(),
 				senderName = current.senderName.trim(),
 				accessPolicy = current.accessPolicy,
 			)
 			result.fold(
 				onSuccess = { share ->
-					file.thumbnailBytes?.let { filePreviewRepository.save(share.transferId, it) }
+					current.selectedFiles.firstNotNullOfOrNull { it.thumbnailBytes }
+						?.let { filePreviewRepository.save(share.transferId, it) }
 					_state.update {
 						it.copy(
 							isComposerOpen = false,
-							selectedFile = null,
+							selectedFiles = emptyList(),
 							transferName = "",
 							accessPolicy = ShareAccessPolicy.RequireApproval,
 							isSharing = false,
@@ -251,6 +271,12 @@ class SendViewModel(
 		}
 	}
 
+	private fun defaultTransferName(files: List<PickedShareFile>): String = when (files.size) {
+		0 -> ""
+		1 -> files.first().displayName
+		else -> "${files.size} files"
+	}
+
 	private fun sendEffect(effect: SendEffect) {
 		viewModelScope.launch { effects.send(effect) }
 	}

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

@@ -16,6 +16,7 @@ import androidx.compose.foundation.selection.selectable
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.RadioButton
 import androidx.compose.material3.Surface
@@ -39,9 +40,10 @@ import com.vnidrop.app.ui.state.formatBytes
 import com.vnidrop.app.ui.theme.LocalVniDropColors
 import org.jetbrains.compose.resources.stringResource
 import vnidrop.shared.generated.resources.Res
-import vnidrop.shared.generated.resources.button_change_file
+import vnidrop.shared.generated.resources.button_change_files
-import vnidrop.shared.generated.resources.button_choose_file
+import vnidrop.shared.generated.resources.button_choose_files
 import vnidrop.shared.generated.resources.button_clear
+import vnidrop.shared.generated.resources.button_remove_file
 import vnidrop.shared.generated.resources.button_share_file
 import vnidrop.shared.generated.resources.button_sharing_file
 import vnidrop.shared.generated.resources.field_sender_name
@@ -55,6 +57,7 @@ import vnidrop.shared.generated.resources.send_choose_file_body
 import vnidrop.shared.generated.resources.send_choose_file_title
 import vnidrop.shared.generated.resources.send_file_size_unknown
 import vnidrop.shared.generated.resources.send_review_title
+import vnidrop.shared.generated.resources.send_selected_files_count
 
 @Composable
 internal fun TransferComposer(
@@ -63,6 +66,7 @@ internal fun TransferComposer(
 	windowClass: WindowClass,
 	onSelectFile: () -> Unit,
 	onClearFile: () -> Unit,
+	onRemoveFile: (String) -> Unit,
 	onTransferNameChanged: (String) -> Unit,
 	onSenderNameChanged: (String) -> Unit,
 	onAccessPolicyChanged: (ShareAccessPolicy) -> Unit,
@@ -72,16 +76,15 @@ internal fun TransferComposer(
 		modifier = Modifier.fillMaxWidth().verticalScroll(rememberScrollState()).padding(horizontal = 20.dp, vertical = 12.dp),
 		verticalArrangement = Arrangement.spacedBy(16.dp),
 	) {
-		val file = state.selectedFile
+		if (state.selectedFiles.isEmpty()) {
-		if (file == null) {
 			ChooseFileStep(onSelectFile)
 		} else {
 			ReviewFileStep(
-				file = file,
 				state = state,
 				windowClass = windowClass,
 				onSelectFile = onSelectFile,
 				onClearFile = onClearFile,
+				onRemoveFile = onRemoveFile,
 				onTransferNameChanged = onTransferNameChanged,
 				onSenderNameChanged = onSenderNameChanged,
 				onAccessPolicyChanged = onAccessPolicyChanged,
@@ -107,18 +110,18 @@ private fun ChooseFileStep(onSelectFile: () -> Unit) {
 			verticalArrangement = Arrangement.spacedBy(14.dp),
 		) {
 			Icon(SendIcons.File, contentDescription = null, tint = LocalVniDropColors.current.brandLink, modifier = Modifier.size(32.dp))
-			PrimaryButton(stringResource(Res.string.button_choose_file), onClick = onSelectFile)
+			PrimaryButton(stringResource(Res.string.button_choose_files), onClick = onSelectFile)
 		}
 	}
 }
 
 @Composable
 private fun ReviewFileStep(
-	file: PickedShareFile,
 	state: SendState,
 	windowClass: WindowClass,
 	onSelectFile: () -> Unit,
 	onClearFile: () -> Unit,
+	onRemoveFile: (String) -> Unit,
 	onTransferNameChanged: (String) -> Unit,
 	onSenderNameChanged: (String) -> Unit,
 	onAccessPolicyChanged: (ShareAccessPolicy) -> Unit,
@@ -126,7 +129,20 @@ private fun ReviewFileStep(
 	coreInitialized: Boolean,
 ) {
 	Text(stringResource(Res.string.send_review_title), style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.SemiBold)
-	SelectedFileCard(file)
+	if (state.selectedFiles.size > 1) {
+		Text(
+			stringResource(Res.string.send_selected_files_count, state.selectedFiles.size),
+			color = LocalVniDropColors.current.foregroundLighter,
+			style = MaterialTheme.typography.bodyMedium,
+		)
+	}
+	state.selectedFiles.forEach { file ->
+		SelectedFileCard(
+			file = file,
+			canRemove = state.selectedFiles.size > 1 && !state.isSharing,
+			onRemove = { onRemoveFile(file.value) },
+		)
+	}
 	Field(state.transferName, onTransferNameChanged, stringResource(Res.string.field_transfer_name))
 	Field(state.senderName, onSenderNameChanged, stringResource(Res.string.field_sender_name))
 	Text(stringResource(Res.string.send_access_title), style = MaterialTheme.typography.titleMedium, fontWeight = FontWeight.SemiBold)
@@ -147,12 +163,12 @@ private fun ReviewFileStep(
 	if (windowClass == WindowClass.Phone) {
 		Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
 			ShareButton(state, coreInitialized, onCreateShare, Modifier.fillMaxWidth())
-			QuietButton(stringResource(Res.string.button_change_file), onClick = onSelectFile, modifier = Modifier.fillMaxWidth(), enabled = !state.isSharing)
+			QuietButton(stringResource(Res.string.button_change_files), onClick = onSelectFile, modifier = Modifier.fillMaxWidth(), enabled = !state.isSharing)
 		}
 	} else {
 		Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
 			ShareButton(state, coreInitialized, onCreateShare)
-			QuietButton(stringResource(Res.string.button_change_file), onClick = onSelectFile, enabled = !state.isSharing)
+			QuietButton(stringResource(Res.string.button_change_files), onClick = onSelectFile, enabled = !state.isSharing)
 			QuietButton(stringResource(Res.string.button_clear), onClick = onClearFile, enabled = !state.isSharing)
 		}
 	}
@@ -169,7 +185,11 @@ private fun ShareButton(state: SendState, coreInitialized: Boolean, onCreateShar
 }
 
 @Composable
-private fun SelectedFileCard(file: PickedShareFile) {
+private fun SelectedFileCard(
+	file: PickedShareFile,
+	canRemove: Boolean,
+	onRemove: () -> Unit,
+) {
 	Surface(shape = RoundedCornerShape(14.dp), color = LocalVniDropColors.current.backgroundSurface200) {
 		Row(modifier = Modifier.fillMaxWidth().padding(14.dp), verticalAlignment = Alignment.CenterVertically) {
 			Box(Modifier.size(44.dp).background(LocalVniDropColors.current.backgroundSurface300, RoundedCornerShape(11.dp))) {
@@ -184,6 +204,11 @@ private fun SelectedFileCard(file: PickedShareFile) {
 					style = MaterialTheme.typography.bodySmall,
 				)
 			}
+			if (canRemove) {
+				IconButton(onClick = onRemove) {
+					Icon(SendIcons.Delete, stringResource(Res.string.button_remove_file), tint = LocalVniDropColors.current.destructiveDefault)
+				}
+			}
 		}
 	}
 }

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

@@ -181,6 +181,9 @@ private fun ReceiverRow(receiver: ReceiverRequestModel) {
 			Text(it, color = LocalVniDropColors.current.foregroundLighter, style = MaterialTheme.typography.bodySmall)
 		}
 		Text(receiverStatusText(receiver.status), color = receiverStatusColor(receiver.status), style = MaterialTheme.typography.bodySmall, fontWeight = FontWeight.Medium)
+		receiver.reason?.takeIf { it.isNotBlank() }?.let { reason ->
+			Text(reason, color = LocalVniDropColors.current.foregroundLighter, style = MaterialTheme.typography.bodySmall)
+		}
 	}
 }
 

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

@@ -174,7 +174,7 @@ class ViewModelsTest {
 		Dispatchers.setMain(StandardTestDispatcher(testScheduler))
 		val viewModel = SendViewModel(FakeCoreGateway(), FakeFileSystemService(folder), preferences(), FakeFilePreviewRepository(), UiMessageController())
 		viewModel.openComposer()
-		viewModel.onFilePicked(com.vnidrop.app.core.PickedShareFile("/tmp/photo.jpg", "photo.jpg", 42UL))
+		viewModel.onFilesPicked(listOf(com.vnidrop.app.core.PickedShareFile("/tmp/photo.jpg", "photo.jpg", 42UL)))
 		assertEquals("photo.jpg", viewModel.state.value.transferName)
 		assertEquals(42UL, viewModel.state.value.selectedFile?.sizeBytes)
 		viewModel.clearSelectedSource()
@@ -195,7 +195,7 @@ class ViewModelsTest {
 		val thumbnail = ByteArray(12).also {
 			it[0] = 0x89.toByte(); it[1] = 'P'.code.toByte(); it[2] = 'N'.code.toByte(); it[3] = 'G'.code.toByte()
 		}
-		viewModel.onFilePicked(com.vnidrop.app.core.PickedShareFile("/tmp/photo.jpg", "photo.jpg", 42UL, thumbnail))
+		viewModel.onFilesPicked(listOf(com.vnidrop.app.core.PickedShareFile("/tmp/photo.jpg", "photo.jpg", 42UL, thumbnail)))
 		viewModel.setAccessPolicy(ShareAccessPolicy.AnyoneWithTransfer)
 		viewModel.createShare()
 		advanceUntilIdle()
@@ -214,7 +214,7 @@ class ViewModelsTest {
 		val viewModel = SendViewModel(core, FakeFileSystemService(folder), preferences(), FakeFilePreviewRepository(), UiMessageController())
 		advanceUntilIdle()
 		viewModel.openComposer()
-		viewModel.onFilePicked(com.vnidrop.app.core.PickedShareFile("/tmp/photo.jpg", "photo.jpg", 42UL))
+		viewModel.onFilesPicked(listOf(com.vnidrop.app.core.PickedShareFile("/tmp/photo.jpg", "photo.jpg", 42UL)))
 		viewModel.createShare()
 		advanceUntilIdle()
 
@@ -223,6 +223,29 @@ class ViewModelsTest {
 		assertFalse(viewModel.state.value.isSharing)
 	}
 
+	@Test
+	fun sendViewModelSupportsMultipleFilesAndDefaultName() = runTest {
+		Dispatchers.setMain(StandardTestDispatcher(testScheduler))
+		val core = FakeCoreGateway().apply {
+			mutableState.value = CoreState(isInitialized = true)
+			shareResult = Result.success(Share(9UL, "ticket", "2 files", "hash", 2UL, 84UL))
+		}
+		val viewModel = SendViewModel(core, FakeFileSystemService(folder), preferences(), FakeFilePreviewRepository(), UiMessageController())
+		advanceUntilIdle()
+		viewModel.onFilesPicked(
+			listOf(
+				com.vnidrop.app.core.PickedShareFile("/tmp/a.jpg", "a.jpg", 40UL),
+				com.vnidrop.app.core.PickedShareFile("/tmp/b.jpg", "b.jpg", 44UL),
+			),
+		)
+		assertEquals("2 files", viewModel.state.value.transferName)
+		assertEquals(2, viewModel.state.value.selectedFiles.size)
+		viewModel.createShare()
+		advanceUntilIdle()
+		assertEquals(2, core.lastShareSourceCount)
+		assertTrue(viewModel.state.value.selectedFiles.isEmpty())
+	}
+
 	@Test
 	fun sendDeletionRemovesCoreTransferAndOwnedPreview() = runTest {
 		Dispatchers.setMain(StandardTestDispatcher(testScheduler))

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

@@ -67,8 +67,43 @@ class FakeCoreGateway : CoreGateway {
 		return Result.success(Unit)
 	}
 	override fun shutdown() = Unit
-	override suspend fun sharePath(path: String, transferName: String, senderName: String, accessPolicy: ShareAccessPolicy): Result<Share> {
+	var lastShareSourceCount: Int = 0
+	override suspend fun sharePath(path: String, transferName: String, senderName: String, accessPolicy: ShareAccessPolicy): Result<Share> =
+		shareSources(
+			sources = listOf(
+				uniffi.vnidrop.ShareSource(
+					kind = uniffi.vnidrop.SourceKind.PATH,
+					value = path,
+					displayName = path.substringAfterLast('/'),
+					isDirectory = false,
+				),
+			),
+			transferName = transferName,
+			senderName = senderName,
+			accessPolicy = accessPolicy,
+		)
+	override suspend fun shareFileDescriptor(
+		fd: Int,
+		displayName: String,
+		transferName: String,
+		senderName: String,
+		accessPolicy: ShareAccessPolicy,
+	) = Result.failure<Share>(UnsupportedOperationException())
+	override suspend fun shareSecurityScopedFileUrl(
+		fileUrl: String,
+		displayName: String,
+		transferName: String,
+		senderName: String,
+		accessPolicy: ShareAccessPolicy,
+	) = Result.failure<Share>(UnsupportedOperationException())
+	override suspend fun shareSources(
+		sources: List<uniffi.vnidrop.ShareSource>,
+		transferName: String,
+		senderName: String,
+		accessPolicy: ShareAccessPolicy,
+	): Result<Share> {
 		lastShareAccessPolicy = accessPolicy
+		lastShareSourceCount = sources.size
 		shareResult.onSuccess { share ->
 			mutableState.value = mutableState.value.copy(
 				transfers = listOf(
@@ -92,20 +127,6 @@ class FakeCoreGateway : CoreGateway {
 		}
 		return shareResult
 	}
-	override suspend fun shareFileDescriptor(
-		fd: Int,
-		displayName: String,
-		transferName: String,
-		senderName: String,
-		accessPolicy: ShareAccessPolicy,
-	) = Result.failure<Share>(UnsupportedOperationException())
-	override suspend fun shareSecurityScopedFileUrl(
-		fileUrl: String,
-		displayName: String,
-		transferName: String,
-		senderName: String,
-		accessPolicy: ShareAccessPolicy,
-	) = Result.failure<Share>(UnsupportedOperationException())
 	override suspend fun inspectTicket(ticket: String) = inspectionResult
 	override suspend fun receive(ticket: String, outputDir: String, receiverName: String): Result<Unit> {
 		receiveCount += 1
@@ -202,13 +223,23 @@ class FakeFileSystemService(
 	override fun defaultReceiveFolder() = folder
 	override suspend fun validateReceiveFolder(folder: ReceiveFolder) = FolderAccessStatus.Writable
 	override fun createReceiveOutputSink(folder: ReceiveFolder): ReceiveOutputSink? = null
-	override suspend fun sharePickedFile(
+	override suspend fun sharePickedFiles(
 		repository: CoreGateway,
-		file: PickedShareFile,
+		files: List<PickedShareFile>,
 		transferName: String,
 		senderName: String,
 		accessPolicy: ShareAccessPolicy,
-	) = repository.sharePath(file.value, transferName, senderName, accessPolicy)
+	): Result<Share> {
+		val sources = files.map { file ->
+			uniffi.vnidrop.ShareSource(
+				kind = uniffi.vnidrop.SourceKind.PATH,
+				value = file.value,
+				displayName = file.displayName,
+				isDirectory = false,
+			)
+		}
+		return repository.shareSources(sources, transferName, senderName, accessPolicy)
+	}
 }
 
 class FakeFilePreviewRepository : FilePreviewRepository {

shared/src/commonTest/kotlin/com/vnidrop/app/ui/state/AppUiModelsTest.kt

@@ -47,7 +47,7 @@ class AppUiModelsTest {
 	@Test
 	fun sendStateExposesShareEligibility() {
 		val ready = SendState(
-			selectedFile = PickedShareFile("/tmp/payload.txt", "payload.txt", 128UL),
+			selectedFiles = listOf(PickedShareFile("/tmp/payload.txt", "payload.txt", 128UL)),
 			transferName = "payload.txt",
 		)
 

shared/src/iosMain/kotlin/com/vnidrop/app/core/FilePicker.ios.kt

@@ -23,12 +23,12 @@ private var retainedPickerDelegate: DocumentPickerDelegate? = null
 
 @Composable
 actual fun rememberShareFilePicker(
-	onFilePicked: (PickedShareFile) -> Unit,
+	onFilesPicked: (List<PickedShareFile>) -> Unit,
 	onError: (String) -> Unit,
-): ShareFilePicker = remember(onFilePicked, onError) {
+): ShareFilePicker = remember(onFilesPicked, onError) {
 	object : ShareFilePicker {
 		@OptIn(ExperimentalForeignApi::class)
-		override fun pickFile() {
+		override fun pickFiles() {
 			val presenter = UIApplication.sharedApplication.keyWindow?.rootViewController
 			if (presenter == null) {
 				onError("Could not find an iOS view controller for the document picker")
@@ -36,7 +36,11 @@ actual fun rememberShareFilePicker(
 			}
 
 			val picker = UIDocumentPickerViewController(forOpeningContentTypes = listOf(UTTypeItem), asCopy = false)
-			val delegate = DocumentPickerDelegate(onFilePicked, onError)
+			picker.allowsMultipleSelection = true
+			val delegate = DocumentPickerDelegate(
+				onFilesPicked = onFilesPicked,
+				onError = onError,
+			)
 			retainedPickerDelegate = delegate
 			picker.delegate = delegate
 			picker.modalPresentationStyle = UIModalPresentationFormSheet
@@ -61,7 +65,8 @@ actual fun rememberReceiveFolderPicker(
 
 			val picker = UIDocumentPickerViewController(forOpeningContentTypes = listOf(UTTypeFolder), asCopy = false)
 			val delegate = DocumentPickerDelegate(
-				onFilePicked = { folder ->
+				onFilesPicked = { folders ->
+					val folder = folders.firstOrNull() ?: return@DocumentPickerDelegate
 					onFolderPicked(
 						ReceiveFolder(
 							kind = ReceiveFolderKind.IosSecurityScopedUrl,
@@ -81,14 +86,12 @@ actual fun rememberReceiveFolderPicker(
 }
 
 private class DocumentPickerDelegate(
-	private val onFilePicked: (PickedShareFile) -> Unit,
+	private val onFilesPicked: (List<PickedShareFile>) -> Unit,
 	private val onError: (String) -> Unit,
 ) : NSObject(), UIDocumentPickerDelegateProtocol {
 	override fun documentPicker(controller: UIDocumentPickerViewController, didPickDocumentsAtURLs: List<*>) {
-		val url = didPickDocumentsAtURLs.firstOrNull() as? NSURL
+		val files = didPickDocumentsAtURLs.mapNotNull { raw ->
-		if (url == null) {
+			val url = raw as? NSURL ?: return@mapNotNull null
-			onError("The selected iOS document URL was invalid")
-		} else {
 			val displayName = url.lastPathComponent ?: "transfer"
 			val didStartAccess = url.startAccessingSecurityScopedResource()
 			val sizeBytes = try {
@@ -97,15 +100,18 @@ private class DocumentPickerDelegate(
 			} finally {
 				if (didStartAccess) url.stopAccessingSecurityScopedResource()
 			}
-			onFilePicked(
+			PickedShareFile(
-				PickedShareFile(
+				url.absoluteString ?: url.path.orEmpty(),
-					url.absoluteString ?: url.path.orEmpty(),
+				displayName,
-					displayName,
+				sizeBytes,
-					sizeBytes,
+				nativeFileIcon(url),
-					nativeFileIcon(url),
-				),
 			)
 		}
+		if (files.isEmpty()) {
+			onError("The selected iOS document URL was invalid")
+		} else {
+			onFilesPicked(files)
+		}
 		retainedPickerDelegate = null
 	}
 

shared/src/iosMain/kotlin/com/vnidrop/app/core/FileSystemService.ios.kt

@@ -43,19 +43,24 @@ private class IosFileSystemService : FileSystemService {
 
 	override fun createReceiveOutputSink(folder: ReceiveFolder): ReceiveOutputSink? = null
 
-	override suspend fun sharePickedFile(
+	override suspend fun sharePickedFiles(
 		repository: CoreGateway,
-		file: PickedShareFile,
+		files: List<PickedShareFile>,
 		transferName: String,
 		senderName: String,
 		accessPolicy: ShareAccessPolicy,
-	): Result<Share> = repository.shareSecurityScopedFileUrl(
+	): Result<Share> {
-		file.value,
+		require(files.isNotEmpty()) { "Select at least one file to share" }
-		file.displayName,
+		val sources = files.map { file ->
-		transferName,
+			uniffi.vnidrop.ShareSource(
-		senderName,
+				kind = uniffi.vnidrop.SourceKind.IOS_SECURITY_SCOPED_URL,
-		accessPolicy,
+				value = file.value,
-	)
+				displayName = file.displayName,
+				isDirectory = false,
+			)
+		}
+		return repository.shareSources(sources, transferName, senderName, accessPolicy)
+	}
 
 	private fun validateSecurityScopedUrl(value: String): FolderAccessStatus {
 		val url = NSURL.URLWithString(value) ?: NSURL.fileURLWithPath(value)

shared/src/iosMain/kotlin/com/vnidrop/app/feature/receive/ReceiveInvitationActions.ios.kt

@@ -19,8 +19,9 @@ private var retainedInvitationDelegate: InvitationDocumentDelegate? = null
 actual fun rememberReceiveInvitationActions(): ReceiveInvitationActions = remember {
 	object : ReceiveInvitationActions {
 		override val fileAvailability = ReceiveMethodAvailability.Available
-		override val qrAvailability = ReceiveMethodAvailability.Unavailable
+		// Hide unfinished iOS methods so the method list only shows what works.
-		override val nfcAvailability = ReceiveMethodAvailability.Unavailable
+		override val qrAvailability = ReceiveMethodAvailability.Hidden
+		override val nfcAvailability = ReceiveMethodAvailability.Hidden
 
 		@OptIn(ExperimentalForeignApi::class)
 		override fun pickInvitation(onResult: (Result<String>) -> Unit) {

shared/src/jvmMain/kotlin/com/vnidrop/app/core/FilePicker.jvm.kt

@@ -15,13 +15,14 @@ import javax.swing.filechooser.FileSystemView
 
 @Composable
 actual fun rememberShareFilePicker(
-	onFilePicked: (PickedShareFile) -> Unit,
+	onFilesPicked: (List<PickedShareFile>) -> Unit,
 	onError: (String) -> Unit,
-): ShareFilePicker = remember(onFilePicked, onError) {
+): ShareFilePicker = remember(onFilesPicked, onError) {
 	object : ShareFilePicker {
-		override fun pickFile() {
+		override fun pickFiles() {
 			openPicker(onError) {
-				pickShareFile()?.let(onFilePicked)
+				val selected = pickShareFiles()
+				if (selected.isNotEmpty()) onFilesPicked(selected)
 			}
 		}
 	}
@@ -71,22 +72,24 @@ private fun activeFrame(): Frame? {
 		?: Frame.getFrames().firstOrNull { it.isVisible }
 }
 
-private fun pickShareFile(): PickedShareFile? {
+private fun pickShareFiles(): List<PickedShareFile> {
-	val dialog = nativeFileDialog("Select file to share")
+	val dialog = nativeFileDialog("Select files to share").apply {
+		isMultipleMode = true
+	}
 	return try {
 		dialog.isVisible = true
-		val directory = dialog.directory
+		val directory = dialog.directory ?: return emptyList()
-		val file = dialog.file
+		val names = dialog.files?.map { it.name }.orEmpty().ifEmpty {
-		if (directory != null && file != null) {
+			dialog.file?.let { listOf(it) }.orEmpty()
-			val selected = File(directory, file)
+		}
+		names.map { name ->
+			val selected = File(directory, name)
 			PickedShareFile(
 				selected.absolutePath,
 				selected.name,
 				selected.length().takeIf { it >= 0L }?.toULong(),
 				selected.systemIconPng(),
 			)
-		} else {
-			null
 		}
 	} finally {
 		dialog.dispose()

shared/src/jvmMain/kotlin/com/vnidrop/app/core/FileSystemService.jvm.kt

@@ -28,11 +28,22 @@ private class JvmFileSystemService : FileSystemService {
 
 	override fun createReceiveOutputSink(folder: ReceiveFolder): ReceiveOutputSink? = null
 
-	override suspend fun sharePickedFile(
+	override suspend fun sharePickedFiles(
 		repository: CoreGateway,
-		file: PickedShareFile,
+		files: List<PickedShareFile>,
 		transferName: String,
 		senderName: String,
 		accessPolicy: ShareAccessPolicy,
-	): Result<Share> = repository.sharePath(file.value, transferName, senderName, accessPolicy)
+	): Result<Share> {
+		require(files.isNotEmpty()) { "Select at least one file to share" }
+		val sources = files.map { file ->
+			uniffi.vnidrop.ShareSource(
+				kind = uniffi.vnidrop.SourceKind.PATH,
+				value = file.value,
+				displayName = file.displayName,
+				isDirectory = false,
+			)
+		}
+		return repository.shareSources(sources, transferName, senderName, accessPolicy)
+	}
 }

shared/src/jvmTest/kotlin/com/vnidrop/app/ui/FoundationComposeTest.kt

@@ -227,7 +227,7 @@ class FoundationComposeTest {
 
 		onNodeWithText("New transfer").performClick()
 		onNodeWithText("Choose what to share").assertIsDisplayed()
-		onNodeWithText("Choose file").assertIsDisplayed()
+		onNodeWithText("Choose files").assertIsDisplayed()
 	}
 
 	@Test
@@ -239,7 +239,7 @@ class FoundationComposeTest {
 					coreState = CoreState(isInitialized = true),
 					state = SendState(
 						isComposerOpen = true,
-						selectedFile = PickedShareFile("/tmp/photos.zip", "photos.zip", 1536UL),
+						selectedFiles = listOf(PickedShareFile("/tmp/photos.zip", "photos.zip", 1536UL)),
 						transferName = "photos.zip",
 						senderName = "Sender",
 					),