feat(send): build durable transfer details and sharing flow

androidApp/src/main/AndroidManifest.xml

@@ -4,6 +4,8 @@
 	<uses-permission android:name="android.permission.INTERNET"/>
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 	<uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
+	<uses-permission android:name="android.permission.NFC"/>
+	<uses-feature android:name="android.hardware.nfc" android:required="false"/>
 
 	<application
 		android:allowBackup="true"
@@ -21,6 +23,13 @@
 				<category android:name="android.intent.category.LAUNCHER"/>
 			</intent-filter>
 		</activity>
+		<provider
+			android:name="androidx.core.content.FileProvider"
+			android:authorities="${applicationId}.fileprovider"
+			android:exported="false"
+			android:grantUriPermissions="true">
+			<meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths"/>
+		</provider>
 	</application>
 
 </manifest>

androidApp/src/main/res/xml/file_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+	<cache-path name="transfer_invitations" path="transfer-invitations/"/>
+</paths>

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ android-minSdk = "24"
 android-targetSdk = "36"
 androidx-activity = "1.13.0"
 androidx-appcompat = "1.7.1"
-androidx-core = "1.19.0"
+androidx-core = "1.18.0"
 androidx-espresso = "3.7.0"
 androidx-lifecycle = "2.11.0-beta01"
 androidx-datastore = "1.2.1"
@@ -16,6 +16,7 @@ junit = "4.13.2"
 kotlin = "2.4.0"
 kotlinx-coroutines = "1.11.0"
 material3 = "1.11.0-alpha07"
+qrcode = "4.5.0"
 jna = "5.17.0"
 
 [libraries]
@@ -42,6 +43,7 @@ compose-uiToolingPreview = { module = "org.jetbrains.compose.ui:ui-tooling-previ
 kotlinx-coroutinesCore = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-core", version.ref = "kotlinx-coroutines" }
 kotlinx-coroutinesTest = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-test", version.ref = "kotlinx-coroutines" }
 kotlinx-coroutinesSwing = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-swing", version.ref = "kotlinx-coroutines" }
+qrcode-kotlin = { module = "io.github.g0dkar:qrcode-kotlin", version.ref = "qrcode" }
 jna = { module = "net.java.dev.jna:jna", version.ref = "jna" }
 
 [plugins]

shared/build.gradle.kts

@@ -37,6 +37,7 @@ kotlin {
 	sourceSets {
 		androidMain.dependencies {
 			implementation(libs.androidx.activity.compose)
+			implementation(libs.androidx.core.ktx)
 			implementation(libs.compose.uiToolingPreview)
 		}
 		commonMain.dependencies {
@@ -51,6 +52,7 @@ kotlin {
 			implementation(libs.androidx.datastore)
 			implementation(libs.androidx.datastore.preferences)
 			implementation(libs.kotlinx.coroutinesCore)
+			implementation(libs.qrcode.kotlin)
 		}
 		commonTest.dependencies {
 			implementation(libs.kotlin.test)

shared/src/androidMain/kotlin/com/vnidrop/app/feature/send/PlatformPreviewStore.android.kt

@@ -0,0 +1,22 @@
+package com.vnidrop.app.feature.send
+
+import java.io.File
+
+actual fun createPlatformPreviewStore(appDataDir: String): PlatformPreviewStore = JvmLikePreviewStore(File(appDataDir, "ui/previews"))
+
+private class JvmLikePreviewStore(private val directory: File) : PlatformPreviewStore {
+	override fun list(): List<PreviewFileInfo> = directory.listFiles().orEmpty().mapNotNull { file ->
+		file.name.removeSuffix(".preview").toULongOrNull()?.let { PreviewFileInfo(it, file.length(), file.lastModified()) }
+	}
+	override fun read(transferId: ULong): ByteArray? = runCatching { file(transferId).takeIf(File::isFile)?.readBytes() }.getOrNull()
+	override fun writeAtomically(transferId: ULong, bytes: ByteArray): Boolean = runCatching {
+		directory.mkdirs()
+		val target = file(transferId)
+		if (target.isFile) return@runCatching true
+		val temporary = File(directory, ".${target.name}.tmp")
+		temporary.writeBytes(bytes)
+		temporary.renameTo(target).also { if (!it) temporary.delete() }
+	}.getOrDefault(false)
+	override fun delete(transferId: ULong) { file(transferId).delete() }
+	private fun file(transferId: ULong) = File(directory, "$transferId.preview")
+}

shared/src/androidMain/kotlin/com/vnidrop/app/feature/send/TransferShareActions.android.kt

@@ -0,0 +1,105 @@
+package com.vnidrop.app.feature.send
+
+import android.content.ClipData
+import android.content.Intent
+import android.nfc.NdefMessage
+import android.nfc.NdefRecord
+import android.nfc.NfcAdapter
+import android.nfc.tech.Ndef
+import android.nfc.tech.NdefFormatable
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.platform.LocalContext
+import androidx.core.content.FileProvider
+import java.io.File
+
+@Composable
+actual fun rememberTransferShareActions(): TransferShareActions {
+	val context = LocalContext.current
+	val activity = context as? ComponentActivity
+	val nfcEnabled = activity?.let { NfcAdapter.getDefaultAdapter(it)?.isEnabled == true } == true
+	var pendingExport by remember { mutableStateOf<PendingExport?>(null) }
+	val exporter = rememberLauncherForActivityResult(
+		ActivityResultContracts.CreateDocument(InvitationMimeType),
+	) { uri ->
+		val pending = pendingExport
+		pendingExport = null
+		if (pending != null && uri != null) {
+			pending.callback(runCatching {
+				context.contentResolver.openOutputStream(uri, "wt")?.use { it.write(pending.ticket.encodeToByteArray()) }
+					?: error("The selected destination could not be opened")
+			})
+		}
+	}
+	return remember(activity, exporter, nfcEnabled) {
+		object : TransferShareActions {
+			override val canUseNativeShare = activity != null
+			override val nfcAvailability = when {
+				activity == null -> NfcShareAvailability.Unavailable
+				nfcEnabled -> NfcShareAvailability.Available
+				else -> NfcShareAvailability.Unavailable
+			}
+
+			override fun exportInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit) {
+				pendingExport = PendingExport(ticket, onResult)
+				exporter.launch(invitationFileName(transferName))
+			}
+
+			override fun shareInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit) {
+				onResult(runCatching {
+					val directory = File(context.cacheDir, "transfer-invitations").apply { mkdirs() }
+					val file = File(directory, invitationFileName(transferName)).apply { writeText(ticket) }
+					val uri = FileProvider.getUriForFile(context, "${context.packageName}.fileprovider", file)
+					val intent = Intent(Intent.ACTION_SEND).apply {
+						type = InvitationMimeType
+						putExtra(Intent.EXTRA_STREAM, uri)
+						clipData = ClipData.newRawUri(file.name, uri)
+						addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+					}
+					context.startActivity(Intent.createChooser(intent, null).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+				})
+			}
+
+			override fun writeInvitationToNfc(ticket: String, onResult: (Result<Unit>) -> Unit) {
+				val host = activity ?: return onResult(Result.failure(UnsupportedOperationException("NFC is unavailable")))
+				val adapter = NfcAdapter.getDefaultAdapter(host)
+				if (adapter?.isEnabled != true) return onResult(Result.failure(UnsupportedOperationException("NFC is unavailable")))
+				adapter.enableReaderMode(host, { tag ->
+					val result = runCatching {
+						val message = NdefMessage(arrayOf(NdefRecord.createMime(InvitationMimeType, ticket.encodeToByteArray())))
+						val ndef = Ndef.get(tag)
+						if (ndef != null) {
+							ndef.connect()
+							try {
+								require(ndef.isWritable) { "This NFC tag is read-only" }
+								require(ndef.maxSize >= message.toByteArray().size) { "This NFC tag is too small" }
+								ndef.writeNdefMessage(message)
+							} finally { ndef.close() }
+						} else {
+							val formatable = NdefFormatable.get(tag) ?: error("This NFC tag cannot store an invitation")
+							formatable.connect()
+							try { formatable.format(message) } finally { formatable.close() }
+						}
+					}
+					host.runOnUiThread {
+						adapter.disableReaderMode(host)
+						onResult(result)
+					}
+				}, NfcAdapter.FLAG_READER_NFC_A or NfcAdapter.FLAG_READER_NFC_B or NfcAdapter.FLAG_READER_NFC_F or NfcAdapter.FLAG_READER_NFC_V, null)
+			}
+
+			override fun cancelNfcWrite() {
+				activity?.let { host -> NfcAdapter.getDefaultAdapter(host)?.disableReaderMode(host) }
+			}
+		}
+	}
+}
+
+private data class PendingExport(val ticket: String, val callback: (Result<Unit>) -> Unit)
+private const val InvitationMimeType = "application/vnd.vnidrop.transfer"

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

@@ -20,6 +20,42 @@
     <string name="send_file_size_unknown">Size unavailable</string>
     <string name="send_transfer_created">Transfer created.</string>
     <string name="send_transfer_details_title">Transfer details</string>
+    <string name="transfer_activity_title">Activity</string>
+    <string name="transfer_activity_description">See important updates for this transfer</string>
+    <string name="transfer_receivers_title">Receivers</string>
+    <string name="transfer_receivers_description">Requests, approvals, and completed deliveries</string>
+    <string name="transfer_share_title">Share</string>
+    <string name="transfer_share_description">QR code, invitation file, and nearby options</string>
+    <string name="transfer_delete_title">Delete transfer?</string>
+    <string name="transfer_delete_description">“%1$s” will stop being shared and its transfer history will be removed from this device.</string>
+    <string name="transfer_deleting">Deleting…</string>
+    <string name="transfer_deleted">Transfer deleted.</string>
+    <string name="transfer_no_activity">There is no activity to show yet.</string>
+    <string name="transfer_no_receivers">Nobody has requested this transfer yet.</string>
+    <string name="transfer_receiver_requested">Waiting for your approval</string>
+    <string name="transfer_receiver_accepted">Approved — waiting for completion</string>
+    <string name="transfer_receiver_refused">Request refused</string>
+    <string name="transfer_receiver_expired">Request expired</string>
+    <string name="transfer_receiver_completed">Received successfully</string>
+    <string name="transfer_receiver_unknown">Status unavailable</string>
+    <string name="transfer_nearby_device">Nearby device</string>
+    <string name="transfer_scan_qr">Scan with VniDrop to receive this transfer</string>
+    <string name="button_write_nfc">Write to NFC tag</string>
+    <string name="button_download_invitation">Save .vnd file</string>
+    <string name="button_native_share">Share invitation</string>
+    <string name="transfer_nfc_unavailable">NFC tag writing is not available on this device.</string>
+    <string name="transfer_nfc_waiting">Hold your device near a writable NFC tag.</string>
+    <string name="transfer_invitation_saved">Invitation saved.</string>
+    <string name="transfer_nfc_written">Invitation written to the NFC tag.</string>
+    <string name="transfer_event_preparing">Preparing the selected files</string>
+    <string name="transfer_event_ready">Transfer ready to share</string>
+    <string name="transfer_event_requested">A receiver requested access</string>
+    <string name="transfer_event_approved">Receiver access approved</string>
+    <string name="transfer_event_refused">Receiver access refused</string>
+    <string name="transfer_event_completed">A receiver completed the transfer</string>
+    <string name="transfer_event_stopped">Sharing stopped</string>
+    <string name="transfer_event_failed">The transfer encountered a problem</string>
+    <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>
@@ -63,6 +99,9 @@
     <string name="button_choose_folder">Choose folder</string>
     <string name="button_reset_default">Reset default</string>
     <string name="button_back">Back</string>
+    <string name="button_close">Close</string>
+    <string name="button_cancel">Cancel</string>
+    <string name="button_delete_transfer">Delete transfer</string>
     <string name="folder_status_writable">Writable</string>
     <string name="folder_status_permission_required">Permission required</string>
     <string name="folder_status_unavailable">Unavailable</string>

shared/src/commonMain/kotlin/com/vnidrop/app/App.kt

@@ -45,7 +45,13 @@ fun App(dependencies: AppDependencies) {
 		AppViewModel(dependencies.environment, graph.coreRepository, graph.preferencesRepository, graph.messages)
 	}
 	val sendViewModel = viewModel {
-		SendViewModel(graph.coreRepository, dependencies.fileSystemService, graph.preferencesRepository, graph.messages)
+		SendViewModel(
+			graph.coreRepository,
+			dependencies.fileSystemService,
+			graph.preferencesRepository,
+			graph.filePreviewRepository,
+			graph.messages,
+		)
 	}
 	val receiveViewModel = viewModel {
 		ReceiveViewModel(graph.coreRepository, dependencies.fileSystemService, graph.preferencesRepository, graph.messages)

shared/src/commonMain/kotlin/com/vnidrop/app/AppGraph.kt

@@ -3,6 +3,8 @@ package com.vnidrop.app
 import com.vnidrop.app.core.CoreGateway
 import com.vnidrop.app.core.CoreRepository
 import com.vnidrop.app.feature.approvals.ApprovalCoordinator
+import com.vnidrop.app.feature.send.AppFilePreviewRepository
+import com.vnidrop.app.feature.send.createPlatformPreviewStore
 import com.vnidrop.app.logging.AppLogger
 import com.vnidrop.app.platform.AppVisibility
 import com.vnidrop.app.preferences.AppPreferencesDefaults
@@ -22,6 +24,9 @@ class AppGraph(
 ) {
 	val visibility = AppVisibility()
 	val messages = UiMessageController()
+	val filePreviewRepository = AppFilePreviewRepository(
+		createPlatformPreviewStore(dependencies.environment.defaultCoreDataDir),
+	)
 	val preferencesRepository = AppPreferencesRepository(
 		dataStore = createAppPreferencesDataStore(dependencies.environment.defaultCoreDataDir),
 		defaults = AppPreferencesDefaults(

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

@@ -89,12 +89,22 @@ data class ReceiverRequestModel(
 	val receiverName: String?,
 	val receiverDeviceName: String?,
 	val appVersion: String,
-	val status: String,
+	val status: ReceiverDeliveryStatus,
 	val reason: String?,
 	val requestedAt: Long,
 	val respondedAt: Long?,
+	val completedAt: Long?,
 )
 
+enum class ReceiverDeliveryStatus {
+	Requested,
+	Accepted,
+	Refused,
+	Expired,
+	Completed,
+	Unknown,
+}
+
 data class CoreState(
 	val isInitialized: Boolean = false,
 	val status: CoreStatus? = null,
@@ -106,6 +116,7 @@ data class CoreState(
 
 sealed interface CoreSignal {
 	data class ApprovalChanged(val transferId: ULong) : CoreSignal
+	data class ReceiverHistoryChanged(val transferId: ULong) : CoreSignal
 }
 
 interface CoreGateway {
@@ -134,6 +145,7 @@ interface CoreGateway {
 	suspend fun receiveWithOutputSink(ticket: String, outputSink: ReceiveOutputSink, receiverName: String): Result<Unit>
 	suspend fun receiveIntoSecurityScopedDirectory(ticket: String, outputDirectoryUrl: String, receiverName: String): Result<Unit>
 	suspend fun cancel(transferId: ULong): Result<Unit>
+	suspend fun delete(transferId: ULong): Result<Unit>
 	suspend fun receiverRequests(transferId: ULong): Result<List<ReceiverRequestModel>>
 	suspend fun respondReceiverRequest(requestId: String, accepted: Boolean, reason: String? = null): Result<Unit>
 	suspend fun refresh(): Result<Unit>

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

@@ -49,6 +49,9 @@ class CoreRepository(
 			if (model.phase == "approval" && model.transferId != null) {
 				_signals.tryEmit(CoreSignal.ApprovalChanged(model.transferId))
 			}
+			if (model.phase == "delivery" && model.transferId != null) {
+				_signals.tryEmit(CoreSignal.ReceiverHistoryChanged(model.transferId))
+			}
 		}
 	}
 
@@ -163,6 +166,13 @@ class CoreRepository(
 		refreshSnapshot()
 	}
 
+	override suspend fun delete(transferId: ULong): Result<Unit> = runCore {
+		requireCore().deleteTransfer(transferId)
+		refreshSnapshot()
+		_signals.tryEmit(CoreSignal.ApprovalChanged(transferId))
+		_signals.tryEmit(CoreSignal.ReceiverHistoryChanged(transferId))
+	}
+
 	override suspend fun receiverRequests(transferId: ULong): Result<List<ReceiverRequestModel>> = runCore {
 		requireCore().listReceiverRequests(transferId).map(ReceiverRequest::toModel)
 	}
@@ -328,8 +338,16 @@ private fun ReceiverRequest.toModel(): ReceiverRequestModel = ReceiverRequestMod
 	receiverName = receiverName,
 	receiverDeviceName = receiverDeviceName,
 	appVersion = appVersion,
-	status = status,
+	status = when (status) {
+		"requested" -> ReceiverDeliveryStatus.Requested
+		"accepted" -> ReceiverDeliveryStatus.Accepted
+		"refused" -> ReceiverDeliveryStatus.Refused
+		"expired" -> ReceiverDeliveryStatus.Expired
+		"completed" -> ReceiverDeliveryStatus.Completed
+		else -> ReceiverDeliveryStatus.Unknown
+	},
 	reason = reason,
 	requestedAt = requestedAt,
 	respondedAt = respondedAt,
+	completedAt = completedAt,
 )

shared/src/commonMain/kotlin/com/vnidrop/app/feature/approvals/ApprovalCoordinator.kt

@@ -5,6 +5,7 @@ import com.vnidrop.app.core.CoreSignal
 import com.vnidrop.app.core.TransferDirection
 import com.vnidrop.app.core.TransferStatus
 import com.vnidrop.app.core.ReceiverRequestModel
+import com.vnidrop.app.core.ReceiverDeliveryStatus
 import com.vnidrop.app.notifications.LocalNotification
 import com.vnidrop.app.notifications.LocalNotificationService
 import com.vnidrop.app.notifications.NotificationPermission
@@ -55,6 +56,7 @@ class ApprovalCoordinator(
 			repository.signals.collect { signal ->
 				when (signal) {
 					is CoreSignal.ApprovalChanged -> refresh(signal.transferId)
+					is CoreSignal.ReceiverHistoryChanged -> Unit
 				}
 			}
 		}
@@ -108,7 +110,7 @@ class ApprovalCoordinator(
 	private suspend fun refresh(transferId: ULong) {
 		repository.receiverRequests(transferId).fold(
 			onSuccess = { requests ->
-				val refreshed = requests.filter { it.status == "requested" }.map(ReceiverRequestModel::toPending)
+				val refreshed = requests.filter { it.status == ReceiverDeliveryStatus.Requested }.map(ReceiverRequestModel::toPending)
 				val removed = _state.value.pending.filter { it.transferId == transferId }.map { it.id }.toSet() - refreshed.map { it.id }.toSet()
 				removed.forEach { id ->
 					notifications.cancel(notificationId(id))

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

@@ -0,0 +1,111 @@
+package com.vnidrop.app.feature.send
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.withContext
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+
+data class PreviewFileInfo(
+	val transferId: ULong,
+	val byteSize: Long,
+	val modifiedAtMillis: Long,
+)
+
+interface PlatformPreviewStore {
+	fun list(): List<PreviewFileInfo>
+	fun read(transferId: ULong): ByteArray?
+	fun writeAtomically(transferId: ULong, bytes: ByteArray): Boolean
+	fun delete(transferId: ULong)
+}
+
+expect fun createPlatformPreviewStore(appDataDir: String): PlatformPreviewStore
+
+interface FilePreviewRepository {
+	val previews: StateFlow<Map<ULong, ByteArray>>
+	suspend fun restore(activeTransferIds: Set<ULong>)
+	suspend fun save(transferId: ULong, bytes: ByteArray)
+	suspend fun remove(transferId: ULong)
+}
+
+data class PreviewStoragePolicy(
+	val maxEntryBytes: Int = 512 * 1024,
+	val maxTotalBytes: Long = 20L * 1024L * 1024L,
+) {
+	init {
+		require(maxEntryBytes > 0)
+		require(maxTotalBytes >= maxEntryBytes)
+	}
+}
+
+class AppFilePreviewRepository(
+	private val store: PlatformPreviewStore,
+	private val policy: PreviewStoragePolicy = PreviewStoragePolicy(),
+) : FilePreviewRepository {
+	private val mutex = Mutex()
+	private val _previews = MutableStateFlow<Map<ULong, ByteArray>>(emptyMap())
+	override val previews: StateFlow<Map<ULong, ByteArray>> = _previews.asStateFlow()
+
+	override suspend fun restore(activeTransferIds: Set<ULong>) = withContext(Dispatchers.Default) {
+		mutex.withLock {
+			val files = store.list()
+			for (file in files) {
+				if (file.transferId !in activeTransferIds || file.byteSize !in 1..policy.maxEntryBytes.toLong()) {
+					store.delete(file.transferId)
+				}
+			}
+			enforceQuota()
+			_previews.value = store.list()
+				.filter { it.transferId in activeTransferIds }
+				.mapNotNull { file ->
+					store.read(file.transferId)
+						?.takeIf { it.isSupportedPreview() && it.size <= policy.maxEntryBytes }
+						?.let { file.transferId to it }
+						?: run {
+							store.delete(file.transferId)
+							null
+						}
+				}
+				.toMap()
+		}
+	}
+
+	override suspend fun save(transferId: ULong, bytes: ByteArray) = withContext(Dispatchers.Default) {
+		mutex.withLock {
+			if (bytes.size !in 1..policy.maxEntryBytes || !bytes.isSupportedPreview()) return@withLock
+			if (!store.writeAtomically(transferId, bytes)) return@withLock
+			enforceQuota(protectedTransferId = transferId)
+			if (store.read(transferId) != null) {
+				_previews.value = _previews.value + (transferId to bytes.copyOf())
+			}
+		}
+	}
+
+	override suspend fun remove(transferId: ULong) = withContext(Dispatchers.Default) {
+		mutex.withLock {
+			store.delete(transferId)
+			_previews.value = _previews.value - transferId
+		}
+	}
+
+	private fun enforceQuota(protectedTransferId: ULong? = null) {
+		val files = store.list().sortedBy { it.modifiedAtMillis }
+		var total = files.sumOf(PreviewFileInfo::byteSize)
+		for (file in files) {
+			if (total <= policy.maxTotalBytes) break
+			if (file.transferId == protectedTransferId) continue
+			store.delete(file.transferId)
+			total -= file.byteSize
+			_previews.value = _previews.value - file.transferId
+		}
+	}
+}
+
+private fun ByteArray.isSupportedPreview(): Boolean {
+	val png = size >= 8 && this[0] == 0x89.toByte() && decodeToString(1, 4) == "PNG"
+	val jpeg = size >= 3 && this[0] == 0xff.toByte() && this[1] == 0xd8.toByte() && this[2] == 0xff.toByte()
+	val webp = size >= 12 && decodeToString(0, 4) == "RIFF" && decodeToString(8, 12) == "WEBP"
+	return png || jpeg || webp
+}

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

@@ -170,13 +170,18 @@ private fun TransferListItem(transfer: Transfer, thumbnailBytes: ByteArray?, onC
 			}
 			Spacer(Modifier.width(12.dp))
 			Column(Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(4.dp)) {
+				Row(Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
 					Text(
 						transfer.transferName ?: stringResource(Res.string.send_new_transfer_title),
+						modifier = Modifier.weight(1f, fill = false),
 						style = MaterialTheme.typography.bodyLarge,
 						fontWeight = FontWeight.SemiBold,
 						maxLines = 1,
 						overflow = TextOverflow.Ellipsis,
 					)
+					Spacer(Modifier.width(8.dp))
+					StatusPill(displayNameForStatus(transfer.status), tone = transfer.status.pillTone())
+				}
 				Text(
 					"${formatBytes(transfer.totalSize)} · ${accessPolicyLabel(transfer.accessPolicy)}",
 					color = colors.foregroundLighter,
@@ -185,7 +190,6 @@ private fun TransferListItem(transfer: Transfer, thumbnailBytes: ByteArray?, onC
 					overflow = TextOverflow.Ellipsis,
 				)
 			}
-			StatusPill(displayNameForStatus(transfer.status), tone = transfer.status.pillTone())
 			Spacer(Modifier.width(8.dp))
 			Icon(SendIcons.ChevronRight, contentDescription = null, tint = colors.foregroundLighter, modifier = Modifier.size(18.dp))
 		}

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

@@ -35,6 +35,13 @@ internal object SendIcons {
 		lineTo(5f, 12f)
 		lineTo(12f, 5f)
 	}
+	val Delete = lineIcon("Delete") {
+		moveTo(4f, 7f); lineTo(20f, 7f)
+		moveTo(9f, 7f); lineTo(9f, 4f); lineTo(15f, 4f); lineTo(15f, 7f)
+		moveTo(6f, 7f); lineTo(7f, 21f); lineTo(17f, 21f); lineTo(18f, 7f)
+		moveTo(10f, 11f); lineTo(10f, 17f)
+		moveTo(14f, 11f); lineTo(14f, 17f)
+	}
 	val ChevronRight = lineIcon("ChevronRight") {
 		moveTo(9f, 18f)
 		lineTo(15f, 12f)

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

@@ -18,6 +18,7 @@ fun SendRoute(
 	val coreState by viewModel.coreState.collectAsStateWithLifecycle()
 	val clipboard = LocalClipboardManager.current
 	val picker = rememberShareFilePicker(viewModel::onFilePicked, viewModel::onFilePickFailed)
+	val shareActions = rememberTransferShareActions()
 
 	LaunchedEffect(viewModel) {
 		viewModel.effectFlow.collect { effect ->
@@ -32,6 +33,7 @@ fun SendRoute(
 		coreState = coreState,
 		state = state,
 		windowClass = windowClass,
+		shareActions = shareActions,
 		onOpenComposer = viewModel::openComposer,
 		onDismissComposer = viewModel::dismissComposer,
 		onSelectFile = viewModel::selectFile,
@@ -43,5 +45,13 @@ fun SendRoute(
 		onTransferSelected = viewModel::openTransfer,
 		onCloseTransferDetails = viewModel::closeTransferDetails,
 		onCopyTicket = viewModel::copyTicket,
+		onActivity = viewModel::openActivity,
+		onReceivers = viewModel::openReceivers,
+		onShare = viewModel::openShare,
+		onCloseDetailPanel = viewModel::closeDetailPanel,
+		onInvitationResult = viewModel::onInvitationResult,
+		onRequestDelete = viewModel::requestDeleteTransfer,
+		onDismissDelete = viewModel::dismissDeleteTransfer,
+		onConfirmDelete = viewModel::confirmDeleteTransfer,
 	)
 }

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

@@ -3,7 +3,11 @@ package com.vnidrop.app.feature.send
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.mutableStateMapOf
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.ImageBitmap
 import com.vnidrop.app.core.CoreState
 import com.vnidrop.app.core.ShareAccessPolicy
 import com.vnidrop.app.core.TransferDirection
@@ -15,6 +19,7 @@ fun SendScreen(
 	coreState: CoreState,
 	state: SendState,
 	windowClass: WindowClass,
+	shareActions: TransferShareActions = UnavailableTransferShareActions,
 	onOpenComposer: () -> Unit,
 	onDismissComposer: () -> Unit,
 	onSelectFile: () -> Unit,
@@ -26,13 +31,34 @@ fun SendScreen(
 	onTransferSelected: (ULong) -> Unit,
 	onCloseTransferDetails: () -> Unit,
 	onCopyTicket: (String) -> Unit,
+	onActivity: () -> Unit = {},
+	onReceivers: () -> Unit = {},
+	onShare: () -> Unit = {},
+	onCloseDetailPanel: () -> Unit = {},
+	onInvitationResult: (InvitationAction, Result<Unit>) -> Unit = { _, _ -> },
+	onRequestDelete: () -> Unit = {},
+	onDismissDelete: () -> Unit = {},
+	onConfirmDelete: () -> Unit = {},
 ) {
 	val outgoingTransfers = coreState.transfers.filter { it.direction == TransferDirection.Send }
 	val selectedTransfer = state.selectedTransferId?.let { id -> outgoingTransfers.firstOrNull { it.transferId == id } }
+	val qrCache = remember { mutableStateMapOf<String, ImageBitmap>() }
+	LaunchedEffect(outgoingTransfers.mapNotNull { it.ticket }) {
+		qrCache.keys.retainAll(outgoingTransfers.mapNotNull { it.ticket }.toSet())
+	}
 
 	Box(Modifier.fillMaxSize()) {
 		if (selectedTransfer != null) {
-			TransferDetails(selectedTransfer, onCloseTransferDetails, onCopyTicket)
+			TransferDetails(
+				transfer = selectedTransfer,
+				events = coreState.events,
+				completedReceivers = state.receiverHistory.count { it.status == com.vnidrop.app.core.ReceiverDeliveryStatus.Completed },
+				onBack = onCloseTransferDetails,
+				onActivity = onActivity,
+				onReceivers = onReceivers,
+				onShare = onShare,
+				onDelete = onRequestDelete,
+			)
 		} else {
 			TransferCatalog(
 				transfers = outgoingTransfers,
@@ -59,4 +85,31 @@ fun SendScreen(
 			)
 		}
 	}
+
+	if (selectedTransfer != null && state.detailPanel != null) {
+		AdaptiveDrawer(windowClass = windowClass, onDismissRequest = onCloseDetailPanel) {
+			when (state.detailPanel) {
+				TransferDetailPanel.Activity -> TransferActivityPanel(coreState.events, selectedTransfer.transferId)
+				TransferDetailPanel.Receivers -> ReceiverHistoryPanel(state.receiverHistory, state.isLoadingReceivers)
+				TransferDetailPanel.Share -> TransferSharePanel(
+					selectedTransfer,
+					shareActions,
+					qrBitmap = selectedTransfer.ticket?.let(qrCache::get),
+					onQrRendered = { ticket, bitmap -> qrCache[ticket] = bitmap },
+					onResult = onInvitationResult,
+				)
+			}
+		}
+	}
+
+	if (selectedTransfer != null && state.isDeleteConfirmationOpen) {
+		AdaptiveDrawer(windowClass = windowClass, onDismissRequest = onDismissDelete) {
+			DeleteTransferPanel(
+				transferName = selectedTransfer.transferName,
+				isDeleting = state.isDeleting,
+				onCancel = onDismissDelete,
+				onConfirm = onConfirmDelete,
+			)
+		}
+	}
 }

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

@@ -3,9 +3,11 @@ package com.vnidrop.app.feature.send
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.vnidrop.app.core.CoreGateway
+import com.vnidrop.app.core.CoreSignal
 import com.vnidrop.app.core.FileSystemService
 import com.vnidrop.app.core.PickedShareFile
 import com.vnidrop.app.core.ShareAccessPolicy
+import com.vnidrop.app.core.ReceiverRequestModel
 import com.vnidrop.app.preferences.PreferencesRepository
 import com.vnidrop.app.ui.feedback.UiMessage
 import com.vnidrop.app.ui.feedback.UiMessageController
@@ -17,9 +19,13 @@ import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.receiveAsFlow
 import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
 import vnidrop.shared.generated.resources.Res
 import vnidrop.shared.generated.resources.send_transfer_created
+import vnidrop.shared.generated.resources.transfer_nfc_written
+import vnidrop.shared.generated.resources.transfer_deleted
 
 data class SendState(
 	val isComposerOpen: Boolean = false,
@@ -30,11 +36,18 @@ data class SendState(
 	val isSharing: Boolean = false,
 	val selectedTransferId: ULong? = null,
 	val transferThumbnails: Map<ULong, ByteArray> = emptyMap(),
+	val detailPanel: TransferDetailPanel? = null,
+	val receiverHistory: List<ReceiverRequestModel> = emptyList(),
+	val isLoadingReceivers: Boolean = false,
+	val isDeleteConfirmationOpen: Boolean = false,
+	val isDeleting: Boolean = false,
 ) {
 	fun canCreateShare(coreInitialized: Boolean): Boolean =
 		coreInitialized && selectedFile != null && transferName.isNotBlank() && !isSharing
 }
 
+enum class TransferDetailPanel { Activity, Receivers, Share }
+
 sealed interface SendEffect {
 	data object OpenFilePicker : SendEffect
 	data class CopyTicket(val ticket: String) : SendEffect
@@ -44,6 +57,7 @@ class SendViewModel(
 	private val repository: CoreGateway,
 	private val fileSystemService: FileSystemService,
 	preferencesRepository: PreferencesRepository,
+	private val filePreviewRepository: FilePreviewRepository,
 	private val messages: UiMessageController,
 ) : ViewModel() {
 	private val _state = MutableStateFlow(SendState())
@@ -54,6 +68,29 @@ class SendViewModel(
 	val effectFlow = effects.receiveAsFlow()
 
 	init {
+		viewModelScope.launch {
+			repository.signals.collect { signal ->
+				val transferId = when (signal) {
+					is CoreSignal.ReceiverHistoryChanged -> signal.transferId
+					is CoreSignal.ApprovalChanged -> signal.transferId
+				}
+				if (transferId == _state.value.selectedTransferId &&
+					_state.value.detailPanel == TransferDetailPanel.Receivers
+				) refreshReceivers(transferId)
+			}
+		}
+		viewModelScope.launch {
+			filePreviewRepository.previews.collect { previews ->
+				_state.update { it.copy(transferThumbnails = previews) }
+			}
+		}
+		viewModelScope.launch {
+			coreState.map { core ->
+				core.takeIf { it.isInitialized }?.transfers?.map { it.transferId }?.toSet()
+			}.distinctUntilChanged().collect { activeIds ->
+				if (activeIds != null) filePreviewRepository.restore(activeIds)
+			}
+		}
 		viewModelScope.launch {
 			preferencesRepository.preferences.collect { preferences ->
 				_state.update { current ->
@@ -108,9 +145,70 @@ class SendViewModel(
 	fun setTransferName(value: String) = _state.update { it.copy(transferName = value) }
 	fun setSenderName(value: String) = _state.update { it.copy(senderName = value) }
 	fun setAccessPolicy(value: ShareAccessPolicy) = _state.update { it.copy(accessPolicy = value) }
-	fun openTransfer(transferId: ULong) = _state.update { it.copy(selectedTransferId = transferId) }
+	fun openTransfer(transferId: ULong) {
-	fun closeTransferDetails() = _state.update { it.copy(selectedTransferId = null) }
+		_state.update { it.copy(selectedTransferId = transferId, detailPanel = null) }
+		refreshReceivers(transferId)
+	}
+	fun closeTransferDetails() = _state.update {
+		it.copy(
+			selectedTransferId = null,
+			detailPanel = null,
+			receiverHistory = emptyList(),
+			isDeleteConfirmationOpen = false,
+		)
+	}
+	fun openActivity() = _state.update { it.copy(detailPanel = TransferDetailPanel.Activity) }
+	fun openShare() = _state.update { it.copy(detailPanel = TransferDetailPanel.Share) }
+	fun openReceivers() {
+		val transferId = _state.value.selectedTransferId ?: return
+		_state.update { it.copy(detailPanel = TransferDetailPanel.Receivers) }
+		refreshReceivers(transferId)
+	}
+	fun closeDetailPanel() = _state.update { it.copy(detailPanel = null) }
+	fun requestDeleteTransfer() = _state.update { it.copy(isDeleteConfirmationOpen = true) }
+	fun dismissDeleteTransfer() {
+		if (!_state.value.isDeleting) _state.update { it.copy(isDeleteConfirmationOpen = false) }
+	}
+	fun confirmDeleteTransfer() {
+		val transferId = _state.value.selectedTransferId ?: return
+		if (_state.value.isDeleting) return
+		viewModelScope.launch {
+			_state.update { it.copy(isDeleting = true) }
+			repository.delete(transferId).fold(
+				onSuccess = {
+					filePreviewRepository.remove(transferId)
+					_state.update {
+						it.copy(
+							selectedTransferId = null,
+							detailPanel = null,
+							receiverHistory = emptyList(),
+							isDeleteConfirmationOpen = false,
+							isDeleting = false,
+						)
+					}
+					messages.tryShow(UiMessage(UiText.Resource(Res.string.transfer_deleted), UiMessageTone.Success))
+				},
+				onFailure = { error ->
+					_state.update { it.copy(isDeleting = false) }
+					messages.error(error)
+				},
+			)
+		}
+	}
 	fun copyTicket(ticket: String) = sendEffect(SendEffect.CopyTicket(ticket))
+	fun onInvitationResult(action: InvitationAction, result: Result<Unit>) {
+		result.fold(
+			onSuccess = {
+				val message = when (action) {
+					InvitationAction.Export -> null
+					InvitationAction.Nfc -> Res.string.transfer_nfc_written
+					InvitationAction.Share -> null
+				}
+				message?.let { messages.tryShow(UiMessage(UiText.Resource(it), UiMessageTone.Success)) }
+			},
+			onFailure = messages::error,
+		)
+	}
 
 	fun createShare() {
 		val current = state.value
@@ -127,6 +225,7 @@ class SendViewModel(
 			)
 			result.fold(
 				onSuccess = { share ->
+					file.thumbnailBytes?.let { filePreviewRepository.save(share.transferId, it) }
 					_state.update {
 						it.copy(
 							isComposerOpen = false,
@@ -134,9 +233,6 @@ class SendViewModel(
 							transferName = "",
 							accessPolicy = ShareAccessPolicy.RequireApproval,
 							isSharing = false,
-							transferThumbnails = file.thumbnailBytes?.let { bytes ->
-								it.transferThumbnails + (share.transferId to bytes)
-							} ?: it.transferThumbnails,
 						)
 					}
 					messages.show(UiMessage(UiText.Resource(Res.string.send_transfer_created), UiMessageTone.Success))
@@ -152,4 +248,17 @@ class SendViewModel(
 	private fun sendEffect(effect: SendEffect) {
 		viewModelScope.launch { effects.send(effect) }
 	}
+
+	private fun refreshReceivers(transferId: ULong) {
+		viewModelScope.launch {
+			_state.update { it.copy(isLoadingReceivers = true) }
+			repository.receiverRequests(transferId).fold(
+				onSuccess = { requests -> _state.update { it.copy(receiverHistory = requests, isLoadingReceivers = false) } },
+				onFailure = { error ->
+					_state.update { it.copy(isLoadingReceivers = false) }
+					messages.error(error)
+				},
+			)
+		}
+	}
 }

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

@@ -54,7 +54,6 @@ import vnidrop.shared.generated.resources.send_access_title
 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_new_transfer_title
 import vnidrop.shared.generated.resources.send_review_title
 
 @Composable
@@ -73,7 +72,6 @@ internal fun TransferComposer(
 		modifier = Modifier.fillMaxWidth().verticalScroll(rememberScrollState()).padding(horizontal = 20.dp, vertical = 12.dp),
 		verticalArrangement = Arrangement.spacedBy(16.dp),
 	) {
-		Text(stringResource(Res.string.send_new_transfer_title), style = MaterialTheme.typography.headlineSmall, fontWeight = FontWeight.Bold)
 		val file = state.selectedFile
 		if (file == null) {
 			ChooseFileStep(onSelectFile)

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

@@ -1,45 +1,79 @@
 package com.vnidrop.app.feature.send
 
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ColumnScope
 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.padding
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.statusBarsPadding
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.produceState
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
+import com.vnidrop.app.core.CoreEventModel
+import com.vnidrop.app.core.ReceiverDeliveryStatus
+import com.vnidrop.app.core.ReceiverRequestModel
 import com.vnidrop.app.core.ShareAccessPolicy
 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.screens.TicketText
+import com.vnidrop.app.ui.components.SecondaryButton
 import com.vnidrop.app.ui.state.displayNameForStatus
 import com.vnidrop.app.ui.state.formatBytes
 import com.vnidrop.app.ui.theme.LocalVniDropColors
+import org.jetbrains.compose.resources.decodeToImageBitmap
 import org.jetbrains.compose.resources.stringResource
-import vnidrop.shared.generated.resources.Res
+import qrcode.QRCode
-import vnidrop.shared.generated.resources.button_back
+import kotlinx.coroutines.Dispatchers
-import vnidrop.shared.generated.resources.button_copy_ticket
+import kotlinx.coroutines.withContext
-import vnidrop.shared.generated.resources.metadata_files
+import vnidrop.shared.generated.resources.*
-import vnidrop.shared.generated.resources.metadata_size
+
-import vnidrop.shared.generated.resources.metadata_status
+enum class InvitationAction { Export, Share, Nfc }
-import vnidrop.shared.generated.resources.send_access_anyone
-import vnidrop.shared.generated.resources.send_access_approval
-import vnidrop.shared.generated.resources.send_access_title
-import vnidrop.shared.generated.resources.send_new_transfer_title
-import vnidrop.shared.generated.resources.send_transfer_details_title
 
 @Composable
-internal fun TransferDetails(transfer: Transfer, onBack: () -> Unit, onCopyTicket: (String) -> Unit) {
+internal fun TransferDetails(
+	transfer: Transfer,
+	events: List<CoreEventModel>,
+	completedReceivers: Int,
+	onBack: () -> Unit,
+	onActivity: () -> Unit,
+	onReceivers: () -> Unit,
+	onShare: () -> Unit,
+	onDelete: () -> Unit,
+) {
 	LazyColumn(
 		modifier = Modifier.fillMaxSize().statusBarsPadding(),
 		contentPadding = PaddingValues(16.dp),
@@ -47,14 +81,16 @@ internal fun TransferDetails(transfer: Transfer, onBack: () -> Unit, onCopyTicke
 	) {
 		item {
 			Row(verticalAlignment = Alignment.CenterVertically) {
-				IconButton(onClick = onBack) {
+				IconButton(onClick = onBack) { Icon(SendIcons.Back, stringResource(Res.string.button_back)) }
-					Icon(SendIcons.Back, contentDescription = stringResource(Res.string.button_back))
-				}
 				Text(
 					stringResource(Res.string.send_transfer_details_title),
+					modifier = Modifier.weight(1f),
 					style = MaterialTheme.typography.headlineSmall,
 					fontWeight = FontWeight.Bold,
 				)
+				IconButton(onClick = onDelete) {
+					Icon(SendIcons.Delete, stringResource(Res.string.button_delete_transfer), tint = LocalVniDropColors.current.destructiveDefault)
+				}
 			}
 		}
 		item {
@@ -63,25 +99,242 @@ internal fun TransferDetails(transfer: Transfer, onBack: () -> Unit, onCopyTicke
 				HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
 				DetailValue(stringResource(Res.string.metadata_size), formatBytes(transfer.totalSize))
 				HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
-				DetailValue(stringResource(Res.string.metadata_files), transfer.fileCount.toString())
-				HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
 				DetailValue(stringResource(Res.string.send_access_title), accessPolicyLabel(transfer.accessPolicy))
 			}
 		}
-		transfer.ticket?.let { ticket ->
 		item {
-				AppCard(title = stringResource(Res.string.button_copy_ticket)) {
+			Surface(shape = RoundedCornerShape(16.dp), color = LocalVniDropColors.current.backgroundSurface200) {
-					TicketText(ticket)
+				Column {
-					PrimaryButton(stringResource(Res.string.button_copy_ticket), onClick = { onCopyTicket(ticket) })
+					DetailDestination(
+						title = stringResource(Res.string.transfer_activity_title),
+						description = stringResource(Res.string.transfer_activity_description),
+						count = events.count { it.transferId == transfer.transferId && it.isMeaningfulActivity() },
+						onClick = onActivity,
+					)
+					HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
+					DetailDestination(
+						title = stringResource(Res.string.transfer_receivers_title),
+						description = stringResource(Res.string.transfer_receivers_description),
+						count = completedReceivers,
+						onClick = onReceivers,
+					)
+					HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
+					DetailDestination(
+						title = stringResource(Res.string.transfer_share_title),
+						description = stringResource(Res.string.transfer_share_description),
+						onClick = onShare,
+					)
 				}
 			}
 		}
 	}
 }
 
+@Composable
+private fun DetailDestination(title: String, description: String, count: Int? = null, onClick: () -> Unit) {
+	Row(
+		Modifier.fillMaxWidth().clickable(onClick = onClick).padding(16.dp),
+		verticalAlignment = Alignment.CenterVertically,
+	) {
+		Column(Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(3.dp)) {
+			Text(title, fontWeight = FontWeight.SemiBold)
+			Text(description, color = LocalVniDropColors.current.foregroundLighter, style = MaterialTheme.typography.bodySmall)
+		}
+		if (count != null && count > 0) {
+			Text(count.toString(), modifier = Modifier.background(LocalVniDropColors.current.backgroundSelection, RoundedCornerShape(20.dp)).padding(horizontal = 9.dp, vertical = 3.dp))
+			Spacer(Modifier.width(8.dp))
+		}
+		Icon(SendIcons.ChevronRight, null, tint = LocalVniDropColors.current.foregroundLighter, modifier = Modifier.size(18.dp))
+	}
+}
+
+@Composable
+internal fun ReceiverHistoryPanel(receivers: List<ReceiverRequestModel>, loading: Boolean) {
+	PanelContainer(stringResource(Res.string.transfer_receivers_title)) {
+		when {
+			loading -> Box(Modifier.fillMaxWidth().padding(40.dp), contentAlignment = Alignment.Center) { CircularProgressIndicator() }
+			receivers.isEmpty() -> Text(stringResource(Res.string.transfer_no_receivers), color = LocalVniDropColors.current.foregroundLighter)
+			else -> receivers.forEachIndexed { index, receiver ->
+				if (index > 0) HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
+				ReceiverRow(receiver)
+			}
+		}
+	}
+}
+
+@Composable
+private fun ReceiverRow(receiver: ReceiverRequestModel) {
+	val name = receiver.receiverName ?: receiver.receiverDeviceName ?: stringResource(Res.string.transfer_nearby_device)
+	Column(Modifier.fillMaxWidth().padding(vertical = 13.dp), verticalArrangement = Arrangement.spacedBy(4.dp)) {
+		Text(name, fontWeight = FontWeight.SemiBold, maxLines = 1, overflow = TextOverflow.Ellipsis)
+		receiver.receiverDeviceName?.takeIf { it != name }?.let {
+			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)
+	}
+}
+
+@Composable
+internal fun TransferActivityPanel(events: List<CoreEventModel>, transferId: ULong) {
+	val visible = events.filter { it.transferId == transferId && it.isMeaningfulActivity() }.sortedByDescending(CoreEventModel::timestamp)
+	PanelContainer(stringResource(Res.string.transfer_activity_title)) {
+		if (visible.isEmpty()) Text(stringResource(Res.string.transfer_no_activity), color = LocalVniDropColors.current.foregroundLighter)
+		else visible.forEachIndexed { index, event ->
+			if (index > 0) HorizontalDivider(color = LocalVniDropColors.current.borderDefault)
+			Text(eventTitle(event), modifier = Modifier.padding(vertical = 14.dp), fontWeight = FontWeight.Medium)
+		}
+	}
+}
+
+@Composable
+internal fun TransferSharePanel(
+	transfer: Transfer,
+	actions: TransferShareActions,
+	qrBitmap: androidx.compose.ui.graphics.ImageBitmap?,
+	onQrRendered: (String, androidx.compose.ui.graphics.ImageBitmap) -> Unit,
+	onResult: (InvitationAction, Result<Unit>) -> Unit,
+) {
+	DisposableEffect(actions) { onDispose(actions::cancelNfcWrite) }
+	val ticket = transfer.ticket
+	PanelContainer(stringResource(Res.string.transfer_share_title)) {
+		if (ticket == null) {
+			Text(stringResource(Res.string.transfer_event_preparing), color = LocalVniDropColors.current.foregroundLighter)
+			return@PanelContainer
+		}
+		val renderedBitmap by produceState(qrBitmap, ticket, qrBitmap) {
+			if (value == null) {
+				value = withContext(Dispatchers.Default) {
+					runCatching { QRCode.ofSquares().withSize(8).build(ticket).renderToBytes().decodeToImageBitmap() }.getOrNull()
+				}
+				value?.let { onQrRendered(ticket, it) }
+			}
+		}
+		val renderedQr = renderedBitmap
+		Surface(
+			modifier = Modifier.align(Alignment.CenterHorizontally).size(268.dp),
+			shape = RoundedCornerShape(18.dp),
+			color = Color.White,
+		) {
+			if (renderedQr != null) {
+				Image(renderedQr, null, Modifier.padding(14.dp).fillMaxSize().clip(RoundedCornerShape(8.dp)))
+			} else {
+				Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) { CircularProgressIndicator() }
+			}
+		}
+		Text(
+			stringResource(Res.string.transfer_scan_qr),
+			modifier = Modifier.align(Alignment.CenterHorizontally),
+			color = LocalVniDropColors.current.foregroundLighter,
+			style = MaterialTheme.typography.bodySmall,
+		)
+		if (actions.nfcAvailability != NfcShareAvailability.Hidden) {
+			var writingNfc by remember(ticket) { mutableStateOf(false) }
+			SecondaryButton(
+				if (writingNfc) stringResource(Res.string.transfer_nfc_waiting) else stringResource(Res.string.button_write_nfc),
+				onClick = {
+					writingNfc = true
+					actions.writeInvitationToNfc(ticket) {
+						writingNfc = false
+						onResult(InvitationAction.Nfc, it)
+					}
+				},
+				modifier = Modifier.fillMaxWidth(),
+				enabled = actions.nfcAvailability == NfcShareAvailability.Available && !writingNfc,
+			)
+			if (actions.nfcAvailability == NfcShareAvailability.Unavailable) {
+				Text(stringResource(Res.string.transfer_nfc_unavailable), color = LocalVniDropColors.current.foregroundLighter, style = MaterialTheme.typography.bodySmall)
+			}
+		}
+		SecondaryButton(
+			stringResource(Res.string.button_download_invitation),
+			onClick = { actions.exportInvitation(ticket, transfer.transferName.orEmpty()) { onResult(InvitationAction.Export, it) } },
+			modifier = Modifier.fillMaxWidth(),
+		)
+		PrimaryButton(
+			stringResource(Res.string.button_native_share),
+			onClick = { actions.shareInvitation(ticket, transfer.transferName.orEmpty()) { onResult(InvitationAction.Share, it) } },
+			modifier = Modifier.fillMaxWidth(),
+			enabled = actions.canUseNativeShare,
+		)
+	}
+}
+
+@Composable
+internal fun DeleteTransferPanel(
+	transferName: String?,
+	isDeleting: Boolean,
+	onCancel: () -> Unit,
+	onConfirm: () -> Unit,
+) {
+	PanelContainer(stringResource(Res.string.transfer_delete_title)) {
+		Text(
+			stringResource(Res.string.transfer_delete_description, transferName ?: stringResource(Res.string.send_new_transfer_title)),
+			color = LocalVniDropColors.current.foregroundLighter,
+			style = MaterialTheme.typography.bodyMedium,
+		)
+		Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(10.dp, Alignment.End)) {
+			SecondaryButton(stringResource(Res.string.button_cancel), onClick = onCancel, enabled = !isDeleting)
+			DestructiveButton(
+				if (isDeleting) stringResource(Res.string.transfer_deleting) else stringResource(Res.string.button_delete_transfer),
+				onClick = onConfirm,
+				enabled = !isDeleting,
+			)
+		}
+	}
+}
+
+@Composable
+private fun PanelContainer(title: String, content: @Composable ColumnScope.() -> Unit) {
+	Column(
+		Modifier.fillMaxWidth().verticalScroll(rememberScrollState()).padding(horizontal = 20.dp, vertical = 14.dp),
+		verticalArrangement = Arrangement.spacedBy(14.dp),
+	) {
+		Text(title, style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.Bold)
+		content()
+	}
+}
+
+@Composable
+private fun receiverStatusText(status: ReceiverDeliveryStatus) = stringResource(when (status) {
+	ReceiverDeliveryStatus.Requested -> Res.string.transfer_receiver_requested
+	ReceiverDeliveryStatus.Accepted -> Res.string.transfer_receiver_accepted
+	ReceiverDeliveryStatus.Refused -> Res.string.transfer_receiver_refused
+	ReceiverDeliveryStatus.Expired -> Res.string.transfer_receiver_expired
+	ReceiverDeliveryStatus.Completed -> Res.string.transfer_receiver_completed
+	ReceiverDeliveryStatus.Unknown -> Res.string.transfer_receiver_unknown
+})
+
+@Composable
+private fun receiverStatusColor(status: ReceiverDeliveryStatus) = when (status) {
+	ReceiverDeliveryStatus.Completed -> LocalVniDropColors.current.brandDefault
+	ReceiverDeliveryStatus.Refused, ReceiverDeliveryStatus.Expired -> LocalVniDropColors.current.destructiveDefault
+	else -> LocalVniDropColors.current.foregroundLighter
+}
+
+private fun CoreEventModel.isMeaningfulActivity() =
+	(phase == "import" && kind == "started") ||
+		(phase == "ticket" && kind == "created") ||
+		kind in setOf(
+			"receiver-requested", "receiver-accepted", "receiver-auto-approved",
+			"receiver-refused", "receiver-completed", "share-stopped", "failed",
+		)
+
+@Composable
+private fun eventTitle(event: CoreEventModel) = stringResource(when {
+	event.phase == "import" && event.kind == "started" -> Res.string.transfer_event_preparing
+	event.phase == "ticket" && event.kind == "created" -> Res.string.transfer_event_ready
+	event.kind == "receiver-requested" -> Res.string.transfer_event_requested
+	event.kind == "receiver-accepted" || event.kind == "receiver-auto-approved" -> Res.string.transfer_event_approved
+	event.kind == "receiver-refused" -> Res.string.transfer_event_refused
+	event.kind == "receiver-completed" -> Res.string.transfer_event_completed
+	event.kind == "share-stopped" -> Res.string.transfer_event_stopped
+	event.kind == "failed" -> Res.string.transfer_event_failed
+	else -> Res.string.transfer_event_updated
+})
+
 @Composable
 private fun DetailValue(label: String, value: String) {
-	Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
+	Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
 		Text(label, color = LocalVniDropColors.current.foregroundLighter, style = MaterialTheme.typography.bodySmall)
 		Text(value, fontWeight = FontWeight.Medium, style = MaterialTheme.typography.bodyMedium)
 	}

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

@@ -0,0 +1,38 @@
+package com.vnidrop.app.feature.send
+
+import androidx.compose.runtime.Composable
+
+enum class NfcShareAvailability { Available, Unavailable, Hidden }
+
+interface TransferShareActions {
+	val canUseNativeShare: Boolean
+	val nfcAvailability: NfcShareAvailability
+	fun exportInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit)
+	fun shareInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit)
+	fun writeInvitationToNfc(ticket: String, onResult: (Result<Unit>) -> Unit)
+	fun cancelNfcWrite()
+}
+
+object UnavailableTransferShareActions : TransferShareActions {
+	override val canUseNativeShare = false
+	override val nfcAvailability = NfcShareAvailability.Hidden
+	override fun exportInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit) =
+		onResult(Result.failure(UnsupportedOperationException("Invitation export is unavailable")))
+	override fun shareInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit) =
+		onResult(Result.failure(UnsupportedOperationException("System sharing is unavailable")))
+	override fun writeInvitationToNfc(ticket: String, onResult: (Result<Unit>) -> Unit) =
+		onResult(Result.failure(UnsupportedOperationException("NFC is unavailable")))
+	override fun cancelNfcWrite() = Unit
+}
+
+@Composable
+expect fun rememberTransferShareActions(): TransferShareActions
+
+internal fun invitationFileName(transferName: String): String {
+	val safe = transferName.trim()
+		.map { character -> if (character.isLetterOrDigit() || character in "-_. ") character else '_' }
+		.joinToString("")
+		.trim('.', ' ')
+		.ifBlank { "VniDrop transfer" }
+	return if (safe.endsWith(".vnd", ignoreCase = true)) safe else "$safe.vnd"
+}

shared/src/commonMain/kotlin/com/vnidrop/app/ui/components/AdaptiveDrawer.kt

@@ -4,19 +4,30 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.Surface
 import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.SolidColor
+import androidx.compose.ui.graphics.StrokeCap
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.graphics.vector.path
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
 import androidx.compose.ui.window.DialogProperties
 import com.vnidrop.app.ui.state.WindowClass
 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_close
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -31,9 +42,7 @@ fun AdaptiveDrawer(
 			sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true),
 			containerColor = LocalVniDropColors.current.backgroundDialog,
 		) {
-			Box(Modifier.fillMaxWidth().navigationBarsPadding().padding(bottom = 12.dp)) {
+			ClosableModalContent(onDismissRequest, Modifier.fillMaxWidth().navigationBarsPadding().padding(bottom = 12.dp), content)
-				content()
-			}
 		}
 	} else {
 		Dialog(
@@ -45,9 +54,31 @@ fun AdaptiveDrawer(
 				shape = RoundedCornerShape(20.dp),
 				color = LocalVniDropColors.current.backgroundDialog,
 				shadowElevation = 12.dp,
+			) { ClosableModalContent(onDismissRequest, content = content) }
+		}
+	}
+}
+
+@Composable
+private fun ClosableModalContent(
+	onClose: () -> Unit,
+	modifier: Modifier = Modifier,
+	content: @Composable () -> Unit,
 ) {
+	Box(modifier) {
 		content()
+		IconButton(
+			onClick = onClose,
+			modifier = Modifier.align(androidx.compose.ui.Alignment.TopEnd).padding(8.dp).size(40.dp),
+		) {
+			Icon(CloseIcon, stringResource(Res.string.button_close), tint = LocalVniDropColors.current.foregroundLight)
 		}
 	}
 }
+
+private val CloseIcon = ImageVector.Builder("Close", 24.dp, 24.dp, 24f, 24f).apply {
+	path(fill = SolidColor(Color.Transparent), stroke = SolidColor(Color.Black), strokeLineWidth = 2f, strokeLineCap = StrokeCap.Round) {
+		moveTo(6f, 6f); lineTo(18f, 18f)
+		moveTo(18f, 6f); lineTo(6f, 18f)
 	}
+}.build()

shared/src/commonMain/kotlin/com/vnidrop/app/ui/components/Buttons.kt

@@ -40,3 +40,19 @@ fun QuietButton(text: String, onClick: () -> Unit, modifier: Modifier = Modifier
 		Text(text, maxLines = 1, overflow = TextOverflow.Ellipsis)
 	}
 }
+
+@Composable
+fun DestructiveButton(text: String, onClick: () -> Unit, modifier: Modifier = Modifier, enabled: Boolean = true) {
+	Button(
+		onClick = onClick,
+		enabled = enabled,
+		modifier = modifier.heightIn(min = 44.dp),
+		shape = RoundedCornerShape(8.dp),
+		colors = ButtonDefaults.buttonColors(
+			containerColor = LocalVniDropColors.current.destructiveDefault,
+			contentColor = Color.White,
+		),
+	) {
+		Text(text, maxLines = 1, overflow = TextOverflow.Ellipsis)
+	}
+}

shared/src/commonMain/kotlin/com/vnidrop/app/ui/components/Status.kt

@@ -28,9 +28,10 @@ fun StatusPill(label: String, modifier: Modifier = Modifier, tone: PillTone = Pi
 		PillTone.Warning -> colors.warningDefault
 		PillTone.Destructive -> colors.destructiveDefault
 	}
+	val shape = RoundedCornerShape(7.dp)
 	Row(
-		modifier = modifier.clip(RoundedCornerShape(999.dp)).background(color.copy(alpha = 0.12f))
+		modifier = modifier.clip(shape).background(color.copy(alpha = 0.12f))
-			.border(1.dp, color.copy(alpha = 0.32f), RoundedCornerShape(999.dp)).padding(horizontal = 10.dp, vertical = 5.dp),
+			.border(1.dp, color.copy(alpha = 0.32f), shape).padding(horizontal = 8.dp, vertical = 4.dp),
 		verticalAlignment = Alignment.CenterVertically,
 	) {
 		Box(Modifier.size(7.dp).clip(CircleShape).background(color))

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

@@ -15,6 +15,7 @@ import com.vnidrop.app.notifications.NotificationPermission
 import com.vnidrop.app.preferences.AppPreferences
 import com.vnidrop.app.support.FakeCoreGateway
 import com.vnidrop.app.support.FakeFileSystemService
+import com.vnidrop.app.support.FakeFilePreviewRepository
 import com.vnidrop.app.support.FakeNotificationService
 import com.vnidrop.app.support.FakePreferencesRepository
 import com.vnidrop.app.ui.feedback.UiMessageController
@@ -30,6 +31,7 @@ import kotlinx.coroutines.test.setMain
 import kotlin.test.AfterTest
 import kotlin.test.Test
 import kotlin.test.assertEquals
+import kotlin.test.assertContentEquals
 import kotlin.test.assertFalse
 import kotlin.test.assertTrue
 
@@ -141,7 +143,7 @@ class ViewModelsTest {
 	@Test
 	fun sendViewModelOwnsSelectedFileState() = runTest {
 		Dispatchers.setMain(StandardTestDispatcher(testScheduler))
-		val viewModel = SendViewModel(FakeCoreGateway(), FakeFileSystemService(folder), preferences(), UiMessageController())
+		val viewModel = SendViewModel(FakeCoreGateway(), FakeFileSystemService(folder), preferences(), FakeFilePreviewRepository(), UiMessageController())
 		viewModel.openComposer()
 		viewModel.onFilePicked(com.vnidrop.app.core.PickedShareFile("/tmp/photo.jpg", "photo.jpg", 42UL))
 		assertEquals("photo.jpg", viewModel.state.value.transferName)
@@ -157,10 +159,14 @@ class ViewModelsTest {
 			mutableState.value = CoreState(isInitialized = true)
 			shareResult = Result.success(Share(7UL, "ticket", "photo.jpg", "hash", 1UL, 42UL))
 		}
-		val viewModel = SendViewModel(core, FakeFileSystemService(folder), preferences(), UiMessageController())
+		val previews = FakeFilePreviewRepository()
+		val viewModel = SendViewModel(core, FakeFileSystemService(folder), preferences(), previews, UiMessageController())
 		advanceUntilIdle()
 		viewModel.openComposer()
-		viewModel.onFilePicked(com.vnidrop.app.core.PickedShareFile("/tmp/photo.jpg", "photo.jpg", 42UL))
+		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.setAccessPolicy(ShareAccessPolicy.AnyoneWithTransfer)
 		viewModel.createShare()
 		advanceUntilIdle()
@@ -169,13 +175,14 @@ class ViewModelsTest {
 		assertEquals(null, viewModel.state.value.selectedFile)
 		assertEquals(ShareAccessPolicy.AnyoneWithTransfer, core.lastShareAccessPolicy)
 		assertEquals(7UL, core.state.value.transfers.first().transferId)
+		assertContentEquals(thumbnail, previews.previews.value.getValue(7UL))
 	}
 
 	@Test
 	fun sendComposerStaysOpenWhenShareCreationFails() = runTest {
 		Dispatchers.setMain(StandardTestDispatcher(testScheduler))
 		val core = FakeCoreGateway().apply { mutableState.value = CoreState(isInitialized = true) }
-		val viewModel = SendViewModel(core, FakeFileSystemService(folder), preferences(), UiMessageController())
+		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))
@@ -187,6 +194,36 @@ class ViewModelsTest {
 		assertFalse(viewModel.state.value.isSharing)
 	}
 
+	@Test
+	fun sendDeletionRemovesCoreTransferAndOwnedPreview() = runTest {
+		Dispatchers.setMain(StandardTestDispatcher(testScheduler))
+		val core = FakeCoreGateway().apply {
+			mutableState.value = CoreState(isInitialized = true, transfers = listOf(
+				com.vnidrop.app.core.Transfer(
+					localId = "send-7", transferId = 7UL,
+					direction = com.vnidrop.app.core.TransferDirection.Send,
+					status = com.vnidrop.app.core.TransferStatus.Sharing,
+					peerId = null, transferName = "Photo", contentHash = "hash",
+					fileCount = 1UL, totalSize = 42UL, ticket = "ticket",
+					accessPolicy = ShareAccessPolicy.RequireApproval, createdAt = 1, updatedAt = 1,
+				),
+			))
+		}
+		val previews = FakeFilePreviewRepository()
+		previews.save(7UL, byteArrayOf(1, 2, 3))
+		val viewModel = SendViewModel(core, FakeFileSystemService(folder), preferences(), previews, UiMessageController())
+		advanceUntilIdle()
+		viewModel.openTransfer(7UL)
+		viewModel.requestDeleteTransfer()
+		viewModel.confirmDeleteTransfer()
+		advanceUntilIdle()
+
+		assertEquals(listOf(7UL), core.deletedTransfers)
+		assertFalse(7UL in previews.previews.value)
+		assertEquals(null, viewModel.state.value.selectedTransferId)
+		assertFalse(viewModel.state.value.isDeleteConfirmationOpen)
+	}
+
 	@Test
 	fun receiveViewModelBuildsStateFromPreferences() = runTest {
 		Dispatchers.setMain(StandardTestDispatcher(testScheduler))

shared/src/commonTest/kotlin/com/vnidrop/app/feature/approvals/ApprovalCoordinatorTest.kt

@@ -3,6 +3,7 @@ package com.vnidrop.app.feature.approvals
 import com.vnidrop.app.core.CoreSignal
 import com.vnidrop.app.core.CoreState
 import com.vnidrop.app.core.ReceiverRequestModel
+import com.vnidrop.app.core.ReceiverDeliveryStatus
 import com.vnidrop.app.core.Transfer
 import com.vnidrop.app.core.ReceiveFolder
 import com.vnidrop.app.core.ReceiveFolderKind
@@ -88,10 +89,11 @@ class ApprovalCoordinatorTest {
 		receiverName = "Peer",
 		receiverDeviceName = "Phone",
 		appVersion = "1.0",
-		status = "requested",
+		status = ReceiverDeliveryStatus.Requested,
 		reason = null,
 		requestedAt = requestedAt,
 		respondedAt = null,
+		completedAt = null,
 	)
 
 	private fun activeTransfer() = Transfer(

shared/src/commonTest/kotlin/com/vnidrop/app/feature/send/FilePreviewRepositoryTest.kt

@@ -0,0 +1,68 @@
+package com.vnidrop.app.feature.send
+
+import kotlinx.coroutines.test.runTest
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class FilePreviewRepositoryTest {
+	@Test
+	fun preview_survives_repository_recreation() = runTest {
+		val store = MemoryPreviewStore()
+		AppFilePreviewRepository(store).save(42UL, png(12))
+
+		val restored = AppFilePreviewRepository(store)
+		restored.restore(setOf(42UL))
+
+		assertContentEquals(png(12), restored.previews.value.getValue(42UL))
+	}
+
+	@Test
+	fun restore_removes_orphans_and_corrupt_entries() = runTest {
+		val store = MemoryPreviewStore()
+		store.writeAtomically(1UL, png(12))
+		store.writeAtomically(2UL, "not an image".encodeToByteArray())
+		store.writeAtomically(3UL, png(12))
+
+		val repository = AppFilePreviewRepository(store)
+		repository.restore(setOf(1UL, 2UL))
+
+		assertEquals(setOf(1UL), repository.previews.value.keys)
+		assertFalse(store.entries.containsKey(2UL))
+		assertFalse(store.entries.containsKey(3UL))
+	}
+
+	@Test
+	fun entry_and_total_limits_are_enforced() = runTest {
+		val store = MemoryPreviewStore()
+		val repository = AppFilePreviewRepository(store, PreviewStoragePolicy(maxEntryBytes = 20, maxTotalBytes = 32))
+
+		repository.save(1UL, png(17))
+		store.clock += 1
+		repository.save(2UL, png(17))
+		store.clock += 1
+		repository.save(3UL, png(21))
+
+		assertEquals(setOf(2UL), repository.previews.value.keys)
+		assertTrue(3UL !in store.entries)
+	}
+
+	private fun png(size: Int): ByteArray = ByteArray(size.coerceAtLeast(8)).also {
+		it[0] = 0x89.toByte(); it[1] = 'P'.code.toByte(); it[2] = 'N'.code.toByte(); it[3] = 'G'.code.toByte()
+	}
+}
+
+private class MemoryPreviewStore : PlatformPreviewStore {
+	data class Entry(val bytes: ByteArray, val modified: Long)
+	val entries = mutableMapOf<ULong, Entry>()
+	var clock = 1L
+	override fun list() = entries.map { (id, entry) -> PreviewFileInfo(id, entry.bytes.size.toLong(), entry.modified) }
+	override fun read(transferId: ULong) = entries[transferId]?.bytes?.copyOf()
+	override fun writeAtomically(transferId: ULong, bytes: ByteArray): Boolean {
+		if (transferId !in entries) entries[transferId] = Entry(bytes.copyOf(), clock)
+		return true
+	}
+	override fun delete(transferId: ULong) { entries.remove(transferId) }
+}

shared/src/commonTest/kotlin/com/vnidrop/app/feature/send/TransferShareActionsTest.kt

@@ -0,0 +1,19 @@
+package com.vnidrop.app.feature.send
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+
+class TransferShareActionsTest {
+	@Test
+	fun invitation_names_are_safe_and_have_the_vnd_extension() {
+		val name = invitationFileName("../Summer/photos: 2026")
+		assertEquals("_Summer_photos_ 2026.vnd", name)
+		assertFalse('/' in name)
+	}
+
+	@Test
+	fun an_existing_extension_is_not_duplicated() {
+		assertEquals("Transfer.VND", invitationFileName("Transfer.VND"))
+	}
+}

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

@@ -19,6 +19,7 @@ import com.vnidrop.app.notifications.LocalNotificationService
 import com.vnidrop.app.notifications.NotificationPermission
 import com.vnidrop.app.preferences.AppPreferences
 import com.vnidrop.app.preferences.PreferencesRepository
+import com.vnidrop.app.feature.send.FilePreviewRepository
 import com.vnidrop.app.ui.theme.ThemeMode
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -35,6 +36,8 @@ class FakeCoreGateway : CoreGateway {
 	var responseResult: Result<Unit> = Result.success(Unit)
 	val responses = mutableListOf<Triple<String, Boolean, String?>>()
 	var shareResult: Result<Share> = Result.failure(UnsupportedOperationException())
+	var deleteResult: Result<Unit> = Result.success(Unit)
+	val deletedTransfers = mutableListOf<ULong>()
 	var lastShareAccessPolicy: ShareAccessPolicy? = null
 
 	override suspend fun initialize(appDataDir: String): Result<Unit> {
@@ -86,6 +89,15 @@ class FakeCoreGateway : CoreGateway {
 	override suspend fun receiveWithOutputSink(ticket: String, outputSink: ReceiveOutputSink, receiverName: String) = Result.success(Unit)
 	override suspend fun receiveIntoSecurityScopedDirectory(ticket: String, outputDirectoryUrl: String, receiverName: String) = Result.success(Unit)
 	override suspend fun cancel(transferId: ULong) = Result.success(Unit)
+	override suspend fun delete(transferId: ULong): Result<Unit> {
+		if (deleteResult.isSuccess) {
+			deletedTransfers += transferId
+			mutableState.value = mutableState.value.copy(
+				transfers = mutableState.value.transfers.filterNot { it.transferId == transferId },
+			)
+		}
+		return deleteResult
+	}
 	override suspend fun receiverRequests(transferId: ULong) = Result.success(requests[transferId].orEmpty())
 	override suspend fun respondReceiverRequest(requestId: String, accepted: Boolean, reason: String?): Result<Unit> {
 		responses += Triple(requestId, accepted, reason)
@@ -138,3 +150,12 @@ class FakeFileSystemService(
 		accessPolicy: ShareAccessPolicy,
 	) = repository.sharePath(file.value, transferName, senderName, accessPolicy)
 }
+
+class FakeFilePreviewRepository : FilePreviewRepository {
+	private val state = MutableStateFlow<Map<ULong, ByteArray>>(emptyMap())
+	override val previews: StateFlow<Map<ULong, ByteArray>> = state
+	val restored = mutableListOf<Set<ULong>>()
+	override suspend fun restore(activeTransferIds: Set<ULong>) { restored += activeTransferIds }
+	override suspend fun save(transferId: ULong, bytes: ByteArray) { state.value = state.value + (transferId to bytes) }
+	override suspend fun remove(transferId: ULong) { state.value = state.value - transferId }
+}

shared/src/iosMain/kotlin/com/vnidrop/app/Platform.ios.kt

@@ -5,7 +5,9 @@ import androidx.compose.runtime.remember
 import com.vnidrop.app.core.rememberFileSystemService
 import com.vnidrop.app.notifications.IosLocalNotificationService
 import platform.Foundation.NSBundle
-import platform.Foundation.NSTemporaryDirectory
+import platform.Foundation.NSApplicationSupportDirectory
+import platform.Foundation.NSSearchPathForDirectoriesInDomains
+import platform.Foundation.NSUserDomainMask
 import platform.UIKit.UIDevice
 
 @Composable
@@ -17,7 +19,7 @@ fun rememberIosAppDependencies(): AppDependencies {
 			environment = PlatformEnvironment(
 				name = device.systemName() + " " + device.systemVersion,
 				appVersion = NSBundle.mainBundle.objectForInfoDictionaryKey("CFBundleShortVersionString") as? String ?: "0.1.0",
-				defaultCoreDataDir = NSTemporaryDirectory() + "vnidrop",
+				defaultCoreDataDir = iosApplicationDataDirectory(),
 				defaultUsername = device.name.takeIf(String::isNotBlank) ?: "Receiver",
 			),
 			deviceInfoProvider = IosDeviceInfoProvider(device),
@@ -27,6 +29,11 @@ fun rememberIosAppDependencies(): AppDependencies {
 	}
 }
 
+private fun iosApplicationDataDirectory(): String =
+	(NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, true).firstOrNull() as? String)
+		?.trimEnd('/')?.plus("/VniDrop")
+		?: error("iOS Application Support directory is unavailable")
+
 private class IosDeviceInfoProvider(
 	private val device: UIDevice,
 ) : DeviceInfoProvider {

shared/src/iosMain/kotlin/com/vnidrop/app/feature/send/PlatformPreviewStore.ios.kt

@@ -0,0 +1,62 @@
+package com.vnidrop.app.feature.send
+
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.BetaInteropApi
+import kotlinx.cinterop.addressOf
+import kotlinx.cinterop.readBytes
+import kotlinx.cinterop.usePinned
+import platform.Foundation.NSData
+import platform.Foundation.NSDate
+import platform.Foundation.NSFileManager
+import platform.Foundation.NSFileModificationDate
+import platform.Foundation.NSFileSize
+import platform.Foundation.NSNumber
+import platform.Foundation.create
+import platform.Foundation.dataWithContentsOfFile
+import platform.Foundation.timeIntervalSince1970
+import platform.Foundation.writeToFile
+
+actual fun createPlatformPreviewStore(appDataDir: String): PlatformPreviewStore =
+	IosPreviewStore(appDataDir.trimEnd('/') + "/ui/previews")
+
+@OptIn(ExperimentalForeignApi::class, BetaInteropApi::class)
+private class IosPreviewStore(private val directory: String) : PlatformPreviewStore {
+	private val files = NSFileManager.defaultManager
+
+	override fun list(): List<PreviewFileInfo> {
+		ensureDirectory()
+		return files.contentsOfDirectoryAtPath(directory, null).orEmpty().filterIsInstance<String>().mapNotNull { name ->
+			val id = name.removeSuffix(".preview").toULongOrNull() ?: return@mapNotNull null
+			val attributes = files.attributesOfItemAtPath("$directory/$name", null) ?: return@mapNotNull null
+			val size = (attributes[NSFileSize] as? NSNumber)?.longLongValue ?: 0L
+			val modified = ((attributes[NSFileModificationDate] as? NSDate)?.timeIntervalSince1970 ?: 0.0) * 1000.0
+			PreviewFileInfo(id, size, modified.toLong())
+		}
+	}
+
+	override fun read(transferId: ULong): ByteArray? {
+		val data = NSData.dataWithContentsOfFile(path(transferId)) ?: return null
+		return data.bytes?.readBytes(data.length.toInt())
+	}
+
+	override fun writeAtomically(transferId: ULong, bytes: ByteArray): Boolean {
+		ensureDirectory()
+		if (files.fileExistsAtPath(path(transferId))) return true
+		val temporary = "$directory/.$transferId.tmp"
+		val data = bytes.usePinned { pinned -> NSData.create(bytes = pinned.addressOf(0), length = bytes.size.toULong()) }
+		if (!data.writeToFile(temporary, atomically = true)) return false
+		val moved = files.moveItemAtPath(temporary, path(transferId), null)
+		if (!moved) files.removeItemAtPath(temporary, null)
+		return moved
+	}
+
+	override fun delete(transferId: ULong) {
+		files.removeItemAtPath(path(transferId), null)
+	}
+
+	private fun ensureDirectory() {
+		files.createDirectoryAtPath(directory, withIntermediateDirectories = true, attributes = null, error = null)
+	}
+
+	private fun path(transferId: ULong) = "$directory/$transferId.preview"
+}

shared/src/iosMain/kotlin/com/vnidrop/app/feature/send/TransferShareActions.ios.kt

@@ -0,0 +1,66 @@
+package com.vnidrop.app.feature.send
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.BetaInteropApi
+import platform.Foundation.NSString
+import platform.Foundation.NSTemporaryDirectory
+import platform.Foundation.NSURL
+import platform.Foundation.NSUTF8StringEncoding
+import platform.Foundation.create
+import platform.Foundation.writeToFile
+import platform.UIKit.UIActivityViewController
+import platform.UIKit.UIApplication
+import platform.UIKit.UIDocumentPickerViewController
+import platform.UIKit.UIModalPresentationFormSheet
+
+@OptIn(ExperimentalForeignApi::class)
+@Composable
+actual fun rememberTransferShareActions(): TransferShareActions = remember {
+	object : TransferShareActions {
+		override val canUseNativeShare = true
+		// Core NFC tag writing requires the NFC entitlement. Keep the action
+		// visible but disabled until that capability is provisioned for the app.
+		override val nfcAvailability = NfcShareAvailability.Unavailable
+
+		override fun exportInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit) {
+			onResult(runCatching {
+				val url = createInvitation(ticket, transferName)
+				val picker = UIDocumentPickerViewController(forExportingURLs = listOf(url), asCopy = true)
+				present(picker)
+			})
+		}
+
+		override fun shareInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit) {
+			onResult(runCatching {
+				val url = createInvitation(ticket, transferName)
+				val controller = UIActivityViewController(activityItems = listOf(url), applicationActivities = null)
+				controller.modalPresentationStyle = UIModalPresentationFormSheet
+				presenter().presentViewController(controller, animated = true, completion = null)
+			})
+		}
+
+		override fun writeInvitationToNfc(ticket: String, onResult: (Result<Unit>) -> Unit) {
+			onResult(Result.failure(UnsupportedOperationException("NFC tag writing is not enabled for this build")))
+		}
+		override fun cancelNfcWrite() = Unit
+	}
+}
+
+@OptIn(ExperimentalForeignApi::class, BetaInteropApi::class)
+private fun createInvitation(ticket: String, transferName: String): NSURL {
+	val path = NSTemporaryDirectory().trimEnd('/') + "/" + invitationFileName(transferName)
+	val text = NSString.create(string = ticket)
+	require(text.writeToFile(path, atomically = true, encoding = NSUTF8StringEncoding, error = null)) {
+		"The invitation file could not be created"
+	}
+	return NSURL.fileURLWithPath(path)
+}
+
+private fun presenter() = UIApplication.sharedApplication.keyWindow?.rootViewController
+	?: error("Could not find an iOS view controller")
+
+private fun present(controller: platform.UIKit.UIViewController) {
+	presenter().presentViewController(controller, animated = true, completion = null)
+}

shared/src/jvmMain/kotlin/com/vnidrop/app/feature/send/PlatformPreviewStore.jvm.kt

@@ -0,0 +1,22 @@
+package com.vnidrop.app.feature.send
+
+import java.io.File
+
+actual fun createPlatformPreviewStore(appDataDir: String): PlatformPreviewStore = JvmPreviewStore(File(appDataDir, "ui/previews"))
+
+private class JvmPreviewStore(private val directory: File) : PlatformPreviewStore {
+	override fun list(): List<PreviewFileInfo> = directory.listFiles().orEmpty().mapNotNull { file ->
+		file.name.removeSuffix(".preview").toULongOrNull()?.let { PreviewFileInfo(it, file.length(), file.lastModified()) }
+	}
+	override fun read(transferId: ULong): ByteArray? = runCatching { file(transferId).takeIf(File::isFile)?.readBytes() }.getOrNull()
+	override fun writeAtomically(transferId: ULong, bytes: ByteArray): Boolean = runCatching {
+		directory.mkdirs()
+		val target = file(transferId)
+		if (target.isFile) return@runCatching true
+		val temporary = File(directory, ".${target.name}.tmp")
+		temporary.writeBytes(bytes)
+		temporary.renameTo(target).also { if (!it) temporary.delete() }
+	}.getOrDefault(false)
+	override fun delete(transferId: ULong) { file(transferId).delete() }
+	private fun file(transferId: ULong) = File(directory, "$transferId.preview")
+}

shared/src/jvmMain/kotlin/com/vnidrop/app/feature/send/TransferShareActions.jvm.kt

@@ -0,0 +1,62 @@
+package com.vnidrop.app.feature.send
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import java.awt.EventQueue
+import java.awt.FileDialog
+import java.awt.Frame
+import java.awt.KeyboardFocusManager
+import java.io.File
+
+@Composable
+actual fun rememberTransferShareActions(): TransferShareActions = remember {
+	object : TransferShareActions {
+		override val canUseNativeShare = DesktopShareBridge.shareFile != null
+		override val nfcAvailability = NfcShareAvailability.Hidden
+
+		override fun exportInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit) {
+			EventQueue.invokeLater {
+				onResult(runCatching {
+					val dialog = FileDialog(activeFrame(), "Save VniDrop invitation", FileDialog.SAVE).apply {
+						file = invitationFileName(transferName)
+					}
+					try {
+						dialog.isVisible = true
+						val directory = dialog.directory
+						val name = dialog.file
+						if (directory != null && name != null) File(directory, name).writeText(ticket)
+					} finally { dialog.dispose() }
+				})
+			}
+		}
+
+		override fun shareInvitation(ticket: String, transferName: String, onResult: (Result<Unit>) -> Unit) {
+			EventQueue.invokeLater {
+				val share = DesktopShareBridge.shareFile
+				if (share == null) {
+					onResult(Result.failure(UnsupportedOperationException("System sharing is unavailable on this desktop")))
+					return@invokeLater
+				}
+				onResult(runCatching {
+					val directory = File(System.getProperty("java.io.tmpdir"), "vnidrop-share").apply { mkdirs() }
+					val file = File(directory, invitationFileName(transferName)).apply { writeText(ticket) }
+					share(file).getOrThrow()
+				})
+			}
+		}
+
+		override fun writeInvitationToNfc(ticket: String, onResult: (Result<Unit>) -> Unit) {
+			onResult(Result.failure(UnsupportedOperationException("NFC is unavailable on desktop")))
+		}
+		override fun cancelNfcWrite() = Unit
+	}
+}
+
+private fun activeFrame(): Frame? =
+	(KeyboardFocusManager.getCurrentKeyboardFocusManager().activeWindow as? Frame)
+		?: Frame.getFrames().firstOrNull { it.isActive || it.isFocused }
+
+object DesktopShareBridge {
+	@Volatile
+	var shareFile: ((File) -> Result<Unit>)? = null
+}

shared/src/jvmTest/kotlin/com/vnidrop/app/feature/send/PlatformPreviewStoreTest.kt

@@ -0,0 +1,26 @@
+package com.vnidrop.app.feature.send
+
+import kotlinx.coroutines.test.runTest
+import java.nio.file.Files
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class PlatformPreviewStoreTest {
+	@Test
+	fun preview_is_restored_from_private_application_storage() = runTest {
+		val directory = Files.createTempDirectory("vnidrop-preview-test")
+		try {
+			val bytes = ByteArray(16).also {
+				it[0] = 0x89.toByte(); it[1] = 'P'.code.toByte(); it[2] = 'N'.code.toByte(); it[3] = 'G'.code.toByte()
+			}
+			AppFilePreviewRepository(createPlatformPreviewStore(directory.toString())).save(91UL, bytes)
+
+			val restarted = AppFilePreviewRepository(createPlatformPreviewStore(directory.toString()))
+			restarted.restore(setOf(91UL))
+
+			assertContentEquals(bytes, restarted.previews.value.getValue(91UL))
+		} finally {
+			directory.toFile().deleteRecursively()
+		}
+	}
+}

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

@@ -10,6 +10,8 @@ import androidx.compose.ui.test.assertIsDisplayed
 import androidx.compose.ui.test.assertCountEquals
 import androidx.compose.ui.test.ExperimentalTestApi
 import androidx.compose.ui.test.getUnclippedBoundsInRoot
+import androidx.compose.ui.test.hasClickAction
+import androidx.compose.ui.test.hasText
 import androidx.compose.ui.test.onNodeWithContentDescription
 import androidx.compose.ui.test.onNodeWithTag
 import androidx.compose.ui.test.onNodeWithText
@@ -281,10 +283,39 @@ class FoundationComposeTest {
 			}
 		}
 
+		val titleBounds = onNodeWithText("Photos").getUnclippedBoundsInRoot()
+		val statusBounds = onNodeWithText("Available").getUnclippedBoundsInRoot()
+		assertTrue(statusBounds.left - titleBounds.right <= 12.dp)
 		onNodeWithText("Photos").performClick()
 		runOnIdle { assertEquals(9UL, selectedId) }
 	}
 
+	@Test
+	fun transferDetailsRevealSharingOnlyAfterSelection() = runComposeUiTest {
+		val state = mutableStateOf(SendState(selectedTransferId = 9UL))
+		setContent {
+			VniDropTheme(isDarkTheme = false) {
+				SendScreen(
+					coreState = CoreState(isInitialized = true, transfers = listOf(outgoingTransfer())),
+					state = state.value,
+					windowClass = WindowClass.Desktop,
+					onOpenComposer = {}, onDismissComposer = {}, onSelectFile = {}, onClearFile = {},
+					onTransferNameChanged = {}, onSenderNameChanged = {}, onAccessPolicyChanged = {},
+					onCreateShare = {}, onTransferSelected = {}, onCloseTransferDetails = {}, onCopyTicket = {},
+					onShare = { state.value = state.value.copy(detailPanel = com.vnidrop.app.feature.send.TransferDetailPanel.Share) },
+				)
+			}
+		}
+
+		onNodeWithText("Share").assertIsDisplayed()
+		onAllNodesWithText("Scan with VniDrop to receive this transfer").assertCountEquals(0)
+		onNode(hasText("Share") and hasClickAction()).performClick()
+		runOnIdle { assertEquals(com.vnidrop.app.feature.send.TransferDetailPanel.Share, state.value.detailPanel) }
+		onNodeWithText("Scan with VniDrop to receive this transfer").assertIsDisplayed()
+		onNodeWithText("Save .vnd file").assertIsDisplayed()
+		onNodeWithContentDescription("Close").assertIsDisplayed()
+	}
+
 	@Test
 	fun snackbarActionAndCancellationAreForwarded() = runComposeUiTest {
 		val controller = UiMessageController()