feat(desktop): polish Linux native experience

desktopApp/build.gradle.kts

@@ -24,6 +24,7 @@ dependencies {
 	implementation(projects.shared)
 
 	implementation(compose.desktop.currentOs)
+	implementation(libs.filekit.dialogs)
 	implementation(libs.kotlinx.coroutinesSwing)
 
 	implementation(libs.compose.uiToolingPreview)
@@ -48,6 +49,7 @@ compose.desktop {
 			linux {
 				packageName = "vnidrop"
 				iconFile.set(project.file("../assets/linux/app-icon.png"))
+				modules("jdk.security.auth")
 				debMaintainer = "support@sudosy.fr"
 				appRelease = "1"
 				rpmLicenseType = "Apache-2.0"

desktopApp/src/main/kotlin/com/vnidrop/app/main.kt

@@ -9,13 +9,13 @@ import androidx.compose.foundation.interaction.collectIsHoveredAsState
 import androidx.compose.foundation.interaction.collectIsPressedAsState
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.BasicText
 import androidx.compose.foundation.window.WindowDraggableArea
 import androidx.compose.runtime.Composable
@@ -53,10 +53,12 @@ import com.vnidrop.app.feature.receive.VniDropInvitationExtension
 import com.vnidrop.app.feature.receive.decodeInvitationBytes
 import com.vnidrop.app.platform.DesktopAppearanceBridge
 import com.vnidrop.app.ui.theme.LocalVniDropColors
+import io.github.vinceglb.filekit.FileKit
 import java.awt.Desktop
 import java.io.File
 
 fun main(args: Array<String>) {
+	FileKit.init(appId = "vnidrop")
 	val externalInvitations = ExternalInvitationController()
 	val linux = DesktopAppearanceBridge.isLinux()
 	configureInvitationOpenHandler(externalInvitations)
@@ -114,9 +116,10 @@ private fun ExternalInvitationController.openFile(file: File) {
 	}
 }
 
-private val LinuxTitleBarHeight = 40.dp
-private val LinuxWindowControlWidth = 46.dp
-private val LinuxWindowControlsWidth = 138.dp
+private val LinuxTitleBarHeight = 48.dp
+private val LinuxWindowControlHitTargetSize = 34.dp
+private val LinuxWindowControlVisualSize = 28.dp
+private val LinuxWindowControlsWidth = 120.dp
 private val DesktopContentCornerRadius = 20.dp
 
 @Composable
@@ -156,7 +159,9 @@ private fun WindowScope.LinuxTitleBar(
 		Row(
 			modifier = Modifier
 				.align(Alignment.CenterEnd)
-				.fillMaxHeight(),
+				.padding(end = 10.dp)
+				.background(colors.backgroundSurface300, RoundedCornerShape(20.dp))
+				.padding(3.dp),
 		) {
 			LinuxWindowControlButton(
 				icon = LinuxMinimizeIcon,
@@ -189,17 +194,15 @@ private fun LinuxWindowControlButton(
 	val interactionSource = remember { MutableInteractionSource() }
 	val hovered by interactionSource.collectIsHoveredAsState()
 	val pressed by interactionSource.collectIsPressedAsState()
-	val active = hovered || pressed
-	val background = when {
-		isClose && active -> colors.destructiveDefault
-		active -> colors.backgroundOverlayHover
-		else -> Color.Transparent
+	val visualState = linuxWindowControlVisualState(isClose, hovered, pressed)
+	val background = when (visualState) {
+		LinuxWindowControlVisualState.Default -> Color.Transparent
+		LinuxWindowControlVisualState.NeutralActive -> colors.backgroundOverlayHover
+		LinuxWindowControlVisualState.DestructiveActive -> colors.destructiveDefault
 	}
 	Box(
 		modifier = Modifier
-			.width(LinuxWindowControlWidth)
-			.fillMaxHeight()
-			.background(background)
+			.size(LinuxWindowControlHitTargetSize)
 			.hoverable(interactionSource)
 			.clickable(
 				interactionSource = interactionSource,
@@ -208,14 +211,40 @@ private fun LinuxWindowControlButton(
 				onClick = onClick,
 			),
 		contentAlignment = Alignment.Center,
+	) {
+		Box(
+			modifier = Modifier
+				.size(LinuxWindowControlVisualSize)
+				.background(background, CircleShape),
+			contentAlignment = Alignment.Center,
 		) {
 			Image(
 				painter = rememberVectorPainter(icon),
 				contentDescription = contentDescription,
-			colorFilter = ColorFilter.tint(if (isClose && active) Color.White else colors.foregroundLight),
-			modifier = Modifier.size(15.dp),
+				colorFilter = ColorFilter.tint(
+					if (visualState == LinuxWindowControlVisualState.DestructiveActive) Color.White
+					else colors.foregroundLight,
+				),
+				modifier = Modifier.size(14.dp),
 			)
 		}
+	}
+}
+
+internal enum class LinuxWindowControlVisualState {
+	Default,
+	NeutralActive,
+	DestructiveActive,
+}
+
+internal fun linuxWindowControlVisualState(
+	isClose: Boolean,
+	isHovered: Boolean,
+	isPressed: Boolean,
+): LinuxWindowControlVisualState = when {
+	isClose && (isHovered || isPressed) -> LinuxWindowControlVisualState.DestructiveActive
+	isHovered || isPressed -> LinuxWindowControlVisualState.NeutralActive
+	else -> LinuxWindowControlVisualState.Default
 }
 
 internal fun toggledWindowPlacement(current: WindowPlacement): WindowPlacement =

desktopApp/src/test/kotlin/com/vnidrop/app/DesktopWindowChromeTest.kt

@@ -10,4 +10,28 @@ class DesktopWindowChromeTest {
 		assertEquals(WindowPlacement.Maximized, toggledWindowPlacement(WindowPlacement.Floating))
 		assertEquals(WindowPlacement.Floating, toggledWindowPlacement(WindowPlacement.Maximized))
 	}
+
+	@Test
+	fun closeControlUsesDestructiveStateWhenHoveredOrPressed() {
+		assertEquals(
+			LinuxWindowControlVisualState.DestructiveActive,
+			linuxWindowControlVisualState(isClose = true, isHovered = true, isPressed = false),
+		)
+		assertEquals(
+			LinuxWindowControlVisualState.DestructiveActive,
+			linuxWindowControlVisualState(isClose = true, isHovered = false, isPressed = true),
+		)
+	}
+
+	@Test
+	fun standardControlsKeepNeutralInteractionState() {
+		assertEquals(
+			LinuxWindowControlVisualState.NeutralActive,
+			linuxWindowControlVisualState(isClose = false, isHovered = true, isPressed = false),
+		)
+		assertEquals(
+			LinuxWindowControlVisualState.Default,
+			linuxWindowControlVisualState(isClose = false, isHovered = false, isPressed = false),
+		)
+	}
 }

gradle/libs.versions.toml

@@ -12,6 +12,7 @@ androidx-datastore = "1.2.1"
 androidx-testExt = "1.3.0"
 composeMultiplatform = "1.11.1"
 compottie = "2.2.4"
+filekit = "0.14.2"
 gobley = "0.3.7"
 junit = "4.13.2"
 kotlin = "2.4.0"
@@ -42,6 +43,7 @@ compose-uiTest = { module = "org.jetbrains.compose.ui:ui-test", version.ref = "c
 compose-components-resources = { module = "org.jetbrains.compose.components:components-resources", version.ref = "composeMultiplatform" }
 compose-uiToolingPreview = { module = "org.jetbrains.compose.ui:ui-tooling-preview", version.ref = "composeMultiplatform" }
 compottie-lite = { module = "io.github.alexzhirkevich:compottie-lite", version.ref = "compottie" }
+filekit-dialogs = { module = "io.github.vinceglb:filekit-dialogs", version.ref = "filekit" }
 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" }

shared/build.gradle.kts

@@ -129,6 +129,9 @@ kotlin {
 			implementation(libs.google.code.scanner)
 			implementation(libs.compose.uiToolingPreview)
 		}
+		jvmMain.dependencies {
+			implementation(libs.filekit.dialogs)
+		}
 		commonMain.dependencies {
 			implementation(libs.compose.runtime)
 			implementation(libs.compose.foundation)

shared/src/commonMain/kotlin/com/vnidrop/app/feature/receive/ReceiveScreen.kt

@@ -37,6 +37,7 @@ import androidx.compose.ui.graphics.StrokeJoin
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.graphics.vector.PathBuilder
 import androidx.compose.ui.graphics.vector.path
+import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
@@ -46,6 +47,7 @@ import com.vnidrop.app.core.FolderAccessStatus
 import com.vnidrop.app.core.Transfer
 import com.vnidrop.app.core.TransferDirection
 import com.vnidrop.app.core.TransferStatus
+import com.vnidrop.app.isDesktop
 import com.vnidrop.app.ui.components.AdaptiveDrawer
 import com.vnidrop.app.ui.components.DestructiveButton
 import com.vnidrop.app.ui.components.DestructiveQuietButton
@@ -57,6 +59,7 @@ import com.vnidrop.app.ui.components.SecondaryButton
 import com.vnidrop.app.ui.feedback.UiText
 import com.vnidrop.app.ui.platform.LocalUiPlatform
 import com.vnidrop.app.ui.platform.usesMobilePresentation
+import com.vnidrop.app.ui.navigation.VniDropIcons
 import com.vnidrop.app.ui.state.WindowClass
 import com.vnidrop.app.ui.state.displayNameForStatus
 import com.vnidrop.app.ui.state.formatBytes
@@ -163,8 +166,10 @@ private fun ReceiveHeader(showAction: Boolean, onOpen: () -> Unit) {
 	Row(Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
 		Column(Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(4.dp)) {
 			Text(stringResource(Res.string.receive_title), style = MaterialTheme.typography.headlineMedium, fontWeight = FontWeight.Bold)
+			if (!LocalUiPlatform.current.isDesktop) {
 				Text(stringResource(Res.string.receive_new_subtitle), color = LocalVniDropColors.current.foregroundLighter)
 			}
+		}
 		if (showAction) {
 			Spacer(Modifier.width(16.dp))
 			PrimaryButton(stringResource(Res.string.button_receive_files), onClick = onOpen)
@@ -175,15 +180,27 @@ private fun ReceiveHeader(showAction: Boolean, onOpen: () -> Unit) {
 @Composable
 private fun ReceiveEmptyState(onOpen: () -> Unit) {
 	val colors = LocalVniDropColors.current
+	val desktop = LocalUiPlatform.current.isDesktop
 	Column(
 		Modifier.fillMaxWidth().heightIn(min = 430.dp).padding(horizontal = 20.dp),
 		horizontalAlignment = Alignment.CenterHorizontally,
 		verticalArrangement = Arrangement.Center,
 	) {
+		if (desktop) {
+			Icon(
+				imageVector = VniDropIcons.Receive,
+				contentDescription = null,
+				tint = colors.brandLink,
+				modifier = Modifier
+					.size(88.dp)
+					.testTag("receive-empty-icon"),
+			)
+		} else {
 			EmptyStateAnimation(
 				assetPath = "files/animations/receive_empty_state.json",
 				modifier = Modifier.size(168.dp),
 			)
+		}
 		Text(stringResource(Res.string.receive_empty_title), modifier = Modifier.padding(top = 12.dp), style = MaterialTheme.typography.headlineSmall, fontWeight = FontWeight.Bold)
 		Text(
 			stringResource(Res.string.receive_empty_body),

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

@@ -30,6 +30,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
@@ -37,6 +38,7 @@ import androidx.compose.ui.unit.dp
 import com.vnidrop.app.core.CoreEventModel
 import com.vnidrop.app.core.Transfer
 import com.vnidrop.app.core.TransferStatus
+import com.vnidrop.app.isDesktop
 import com.vnidrop.app.ui.components.EmptyStateAnimation
 import com.vnidrop.app.ui.components.PillTone
 import com.vnidrop.app.ui.components.PrimaryButton
@@ -44,6 +46,7 @@ import com.vnidrop.app.ui.components.ProgressRow
 import com.vnidrop.app.ui.components.StatusPill
 import com.vnidrop.app.ui.platform.LocalUiPlatform
 import com.vnidrop.app.ui.platform.usesMobilePresentation
+import com.vnidrop.app.ui.navigation.VniDropIcons
 import com.vnidrop.app.ui.state.TransferProgress
 import com.vnidrop.app.ui.state.WindowClass
 import com.vnidrop.app.ui.state.activeSendProgress
@@ -128,12 +131,14 @@ private fun CatalogHeader(showAction: Boolean, onOpenComposer: () -> Unit) {
 	Row(modifier = Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
 		Column(Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(4.dp)) {
 			Text(stringResource(Res.string.send_title), style = MaterialTheme.typography.headlineMedium, fontWeight = FontWeight.Bold)
+			if (!LocalUiPlatform.current.isDesktop) {
 				Text(
 					stringResource(Res.string.send_subtitle),
 					color = LocalVniDropColors.current.foregroundLighter,
 					style = MaterialTheme.typography.bodyMedium,
 				)
 			}
+		}
 		if (showAction) {
 			Spacer(Modifier.width(16.dp))
 			PrimaryButton(stringResource(Res.string.button_create_new_transfer), onClick = onOpenComposer)
@@ -144,15 +149,27 @@ private fun CatalogHeader(showAction: Boolean, onOpenComposer: () -> Unit) {
 @Composable
 private fun SendEmptyState(onOpenComposer: () -> Unit) {
 	val colors = LocalVniDropColors.current
+	val desktop = LocalUiPlatform.current.isDesktop
 	Column(
 		modifier = Modifier.fillMaxWidth().heightIn(min = 430.dp).padding(horizontal = 20.dp),
 		horizontalAlignment = Alignment.CenterHorizontally,
 		verticalArrangement = Arrangement.Center,
 	) {
+		if (desktop) {
+			Icon(
+				imageVector = VniDropIcons.Send,
+				contentDescription = null,
+				tint = colors.brandLink,
+				modifier = Modifier
+					.size(88.dp)
+					.testTag("send-empty-icon"),
+			)
+		} else {
 			EmptyStateAnimation(
 				assetPath = "files/animations/send_empty_state.json",
 				modifier = Modifier.size(168.dp),
 			)
+		}
 		Text(
 			stringResource(Res.string.send_empty_title),
 			modifier = Modifier.padding(top = 12.dp),

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

@@ -7,6 +7,8 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
+import com.vnidrop.app.isDesktop
+import com.vnidrop.app.ui.platform.LocalUiPlatform
 import com.vnidrop.app.ui.theme.ThemeMode
 import org.jetbrains.compose.resources.stringResource
 import com.vnidrop.app.ui.theme.LocalVniDropColors
@@ -34,12 +36,14 @@ internal fun SettingsOverview(
 				style = if (largeTitle) MaterialTheme.typography.headlineLarge else MaterialTheme.typography.headlineMedium,
 				fontWeight = FontWeight.Bold,
 			)
+			if (!LocalUiPlatform.current.isDesktop) {
 				Text(
 					stringResource(Res.string.settings_subtitle),
 					color = LocalVniDropColors.current.foregroundLighter,
 					style = MaterialTheme.typography.bodyMedium,
 				)
 			}
+		}
 		SettingsGroup {
 			SettingsRow(
 				icon = SettingsIcons.Device,

shared/src/commonMain/kotlin/com/vnidrop/app/ui/navigation/AppNavigation.kt

@@ -2,7 +2,6 @@ package com.vnidrop.app.ui.navigation
 
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -30,7 +29,6 @@ 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 androidx.compose.ui.unit.dp
 import com.vnidrop.app.UiPlatform
 import com.vnidrop.app.isDesktop
@@ -56,7 +54,6 @@ fun AppSidebarNavigation(
 	selected: AppDestination,
 	style: NavigationStyle,
 	onDestinationSelected: (AppDestination) -> Unit,
-	dividerTopInset: Dp = 0.dp,
 	modifier: Modifier = Modifier,
 ) {
 	when (style) {
@@ -64,7 +61,6 @@ fun AppSidebarNavigation(
 		NavigationStyle.DesktopSidebar -> DesktopSidebarNavigation(
 			selected = selected,
 			onDestinationSelected = onDestinationSelected,
-			dividerTopInset = dividerTopInset,
 			modifier = modifier,
 		)
 		NavigationStyle.AndroidBottomBar -> error("Bottom navigation is rendered by the phone shell")
@@ -106,18 +102,15 @@ private fun AndroidNavigationRail(
 private fun DesktopSidebarNavigation(
 	selected: AppDestination,
 	onDestinationSelected: (AppDestination) -> Unit,
-	dividerTopInset: Dp,
 	modifier: Modifier = Modifier,
 ) {
 	val colors = LocalVniDropColors.current
-	Box(
+	Column(
 		modifier = modifier
 			.width(DesktopNavigationWidthDp.dp)
 			.fillMaxHeight()
-			.background(colors.backgroundSurface200),
-	) {
-		Column(
-			modifier = Modifier.fillMaxHeight().padding(horizontal = 12.dp, vertical = 14.dp),
+			.background(colors.backgroundSurface200)
+			.padding(horizontal = 12.dp, vertical = 14.dp),
 		verticalArrangement = Arrangement.spacedBy(4.dp),
 	) {
 		Text(
@@ -135,15 +128,6 @@ private fun DesktopSidebarNavigation(
 			)
 		}
 	}
-		Box(
-			modifier = Modifier
-				.align(Alignment.TopEnd)
-				.padding(top = dividerTopInset)
-				.width(1.dp)
-				.fillMaxHeight()
-				.background(colors.borderDefault),
-		)
-	}
 }
 
 @Composable

shared/src/commonMain/kotlin/com/vnidrop/app/ui/shell/AppShell.kt

@@ -88,7 +88,6 @@ private fun WideShell(
 		AppSidebarNavigation(
 			selected = selectedDestination,
 			style = navigationStyle,
-			dividerTopInset = mainContentTopStartRadius,
 			onDestinationSelected = onDestinationSelected,
 		)
 		Box(

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

@@ -2,6 +2,12 @@ package com.vnidrop.app.core
 
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import io.github.vinceglb.filekit.FileKit
+import io.github.vinceglb.filekit.dialogs.FileKitDialogSettings
+import io.github.vinceglb.filekit.dialogs.FileKitMode
+import io.github.vinceglb.filekit.dialogs.openDirectoryPicker
+import io.github.vinceglb.filekit.dialogs.openFilePicker
 import java.awt.EventQueue
 import java.awt.FileDialog
 import java.awt.Frame
@@ -12,34 +18,59 @@ import java.io.File
 import javax.imageio.ImageIO
 import javax.swing.JFileChooser
 import javax.swing.filechooser.FileSystemView
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 
 @Composable
 actual fun rememberShareFilePicker(
 	onFilesPicked: (List<PickedShareFile>) -> Unit,
 	onError: (String) -> Unit,
-): ShareFilePicker = remember(onFilesPicked, onError) {
+): ShareFilePicker {
+	val scope = rememberCoroutineScope()
+	return remember(onFilesPicked, onError, scope) {
 		object : ShareFilePicker {
 			override fun pickFiles() {
+				if (jvmFilePickerBackend(System.getProperty("os.name")) == JvmFilePickerBackend.XdgPortal) {
+					scope.launch {
+						try {
+							val selected = withContext(Dispatchers.IO) { pickShareFilesWithPortal() }
+							if (selected.isNotEmpty()) onFilesPicked(selected)
+						} catch (error: CancellationException) {
+							throw error
+						} catch (error: Throwable) {
+							onError(error.message ?: error.toString())
+						}
+					}
+				} else {
 					openPicker(onError) {
 						val selected = pickShareFiles()
 						if (selected.isNotEmpty()) onFilesPicked(selected)
 					}
 				}
+			}
 
 			override fun pickFolder() {
+				if (jvmFilePickerBackend(System.getProperty("os.name")) == JvmFilePickerBackend.XdgPortal) {
+					scope.launch {
+						try {
+							val selected = withContext(Dispatchers.IO) {
+								pickDirectoryWithPortal("Select folder to share")?.toPickedShareFile(isDirectory = true)
+							} ?: return@launch
+							onFilesPicked(listOf(selected))
+						} catch (error: CancellationException) {
+							throw error
+						} catch (error: Throwable) {
+							onError(error.message ?: error.toString())
+						}
+					}
+				} else {
 					openPicker(onError) {
 						val selected = pickDirectory(title = "Select folder to share") ?: return@openPicker
-				onFilesPicked(
-					listOf(
-						PickedShareFile(
-							value = selected.absolutePath,
-							displayName = selected.name.ifBlank { selected.absolutePath },
-							sizeBytes = null,
-							thumbnailBytes = selected.systemIconPng(),
-							isDirectory = true,
-						),
-					),
-				)
+						onFilesPicked(listOf(selected.toPickedShareFile(isDirectory = true)))
+					}
+				}
 			}
 		}
 	}
@@ -49,23 +80,43 @@ actual fun rememberShareFilePicker(
 actual fun rememberReceiveFolderPicker(
 	onFolderPicked: (ReceiveFolder) -> Unit,
 	onError: (String) -> Unit,
-): ReceiveFolderPicker = remember(onFolderPicked, onError) {
+): ReceiveFolderPicker {
+	val scope = rememberCoroutineScope()
+	return remember(onFolderPicked, onError, scope) {
 		object : ReceiveFolderPicker {
 			override fun pickFolder() {
+				if (jvmFilePickerBackend(System.getProperty("os.name")) == JvmFilePickerBackend.XdgPortal) {
+					scope.launch {
+						try {
+							val selected = withContext(Dispatchers.IO) {
+								pickDirectoryWithPortal("Select receive folder")
+							} ?: return@launch
+							onFolderPicked(selected.toReceiveFolder())
+						} catch (error: CancellationException) {
+							throw error
+						} catch (error: Throwable) {
+							onError(error.message ?: error.toString())
+						}
+					}
+				} else {
 					openPicker(onError) {
 						val selected = pickDirectory(title = "Select receive folder") ?: return@openPicker
-				onFolderPicked(
-					ReceiveFolder(
-						kind = ReceiveFolderKind.FileSystemPath,
-						value = selected.absolutePath,
-						displayName = selected.name.ifBlank { selected.absolutePath },
-					),
-				)
+						onFolderPicked(selected.toReceiveFolder())
+					}
+				}
 			}
 		}
 	}
 }
 
+internal enum class JvmFilePickerBackend {
+	XdgPortal,
+	AwtSwing,
+}
+
+internal fun jvmFilePickerBackend(osName: String?): JvmFilePickerBackend =
+	if (osName.orEmpty().startsWith("Linux", ignoreCase = true)) JvmFilePickerBackend.XdgPortal else JvmFilePickerBackend.AwtSwing
+
 private fun openPicker(
 	onError: (String) -> Unit,
 	block: () -> Unit,
@@ -99,20 +150,39 @@ private fun pickShareFiles(): List<PickedShareFile> {
 		val names = dialog.files?.map { it.name }.orEmpty().ifEmpty {
 			dialog.file?.let { listOf(it) }.orEmpty()
 		}
-		names.map { name ->
-			val selected = File(directory, name)
-			PickedShareFile(
-				selected.absolutePath,
-				selected.name,
-				selected.length().takeIf { it >= 0L }?.toULong(),
-				selected.systemIconPng(),
-			)
-		}
+		names.map { name -> File(directory, name).toPickedShareFile(isDirectory = false) }
 	} finally {
 		dialog.dispose()
 	}
 }
 
+private suspend fun pickShareFilesWithPortal(): List<PickedShareFile> =
+	FileKit.openFilePicker(
+		mode = FileKitMode.Multiple(),
+		dialogSettings = FileKitDialogSettings(title = "Select files to share", parentWindow = activeFrame()),
+	).orEmpty().map { it.file.toPickedShareFile(isDirectory = false) }
+
+private suspend fun pickDirectoryWithPortal(title: String): File? =
+	FileKit.openDirectoryPicker(
+		dialogSettings = FileKitDialogSettings(title = title, parentWindow = activeFrame()),
+	)?.file
+
+private fun File.toPickedShareFile(isDirectory: Boolean): PickedShareFile =
+	PickedShareFile(
+		value = absolutePath,
+		displayName = name.ifBlank { absolutePath },
+		sizeBytes = if (isDirectory) null else length().takeIf { it >= 0L }?.toULong(),
+		thumbnailBytes = systemIconPng(),
+		isDirectory = isDirectory,
+	)
+
+private fun File.toReceiveFolder(): ReceiveFolder =
+	ReceiveFolder(
+		kind = ReceiveFolderKind.FileSystemPath,
+		value = absolutePath,
+		displayName = name.ifBlank { absolutePath },
+	)
+
 private fun File.systemIconPng(): ByteArray? = runCatching {
 	val icon = FileSystemView.getFileSystemView().getSystemIcon(this, 128, 128)
 	val image = BufferedImage(icon.iconWidth, icon.iconHeight, BufferedImage.TYPE_INT_ARGB)

shared/src/jvmTest/kotlin/com/vnidrop/app/core/FilePickerJvmTest.kt

@@ -0,0 +1,18 @@
+package com.vnidrop.app.core
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class FilePickerJvmTest {
+	@Test
+	fun linuxUsesTheNativePortalPicker() {
+		assertEquals(JvmFilePickerBackend.XdgPortal, jvmFilePickerBackend("Linux"))
+		assertEquals(JvmFilePickerBackend.XdgPortal, jvmFilePickerBackend("linux"))
+	}
+
+	@Test
+	fun otherDesktopPlatformsKeepTheirExistingPickers() {
+		assertEquals(JvmFilePickerBackend.AwtSwing, jvmFilePickerBackend("Windows 11"))
+		assertEquals(JvmFilePickerBackend.AwtSwing, jvmFilePickerBackend("Mac OS X"))
+	}
+}

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

@@ -1,6 +1,7 @@
 package com.vnidrop.app.ui
 
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.material3.Text
@@ -20,6 +21,7 @@ import androidx.compose.ui.test.performClick
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.test.v2.runComposeUiTest
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.mutableStateOf
 import com.vnidrop.app.feature.approvals.ApprovalModalHost
 import com.vnidrop.app.feature.approvals.ApprovalState
@@ -32,8 +34,10 @@ import com.vnidrop.app.feature.receive.ReceiveState
 import com.vnidrop.app.feature.settings.SettingsScreen
 import com.vnidrop.app.feature.settings.SettingsSection
 import com.vnidrop.app.feature.settings.SettingsState
+import com.vnidrop.app.feature.settings.SettingsOverview
 import com.vnidrop.app.feature.send.SendScreen
 import com.vnidrop.app.feature.send.SendState
+import com.vnidrop.app.feature.send.TransferCatalog
 import com.vnidrop.app.UiPlatform
 import com.vnidrop.app.core.CoreState
 import com.vnidrop.app.core.PickedShareFile
@@ -48,6 +52,7 @@ import com.vnidrop.app.ui.feedback.UiText
 import com.vnidrop.app.ui.feedback.VniDropSnackbarHost
 import com.vnidrop.app.ui.state.WindowClass
 import com.vnidrop.app.ui.navigation.AppDestination
+import com.vnidrop.app.ui.platform.LocalUiPlatform
 import com.vnidrop.app.ui.shell.AppShell
 import com.vnidrop.app.ui.theme.VniDropTheme
 import kotlin.test.Test
@@ -285,6 +290,63 @@ class FoundationComposeTest {
 		runOnIdle { assertEquals(AppDestination.Receive, selected) }
 	}
 
+	@Test
+	fun desktopPagesUseStaticFeatureIconsWithoutTitleDescriptions() = runComposeUiTest {
+		val actions = object : ReceiveInvitationActions {
+			override val fileAvailability = ReceiveMethodAvailability.Hidden
+			override val qrAvailability = ReceiveMethodAvailability.Hidden
+			override val nfcAvailability = ReceiveMethodAvailability.Hidden
+			override fun pickInvitation(onResult: (Result<String>) -> Unit) = Unit
+			override fun scanQrCode(onResult: (Result<String>) -> Unit) = Unit
+			override fun readNfcInvitation(onResult: (Result<String>) -> Unit) = Unit
+			override fun cancel() = Unit
+		}
+		setContent {
+			CompositionLocalProvider(LocalUiPlatform provides UiPlatform.Linux) {
+				VniDropTheme(isDarkTheme = false) {
+					Row {
+						Box(Modifier.size(500.dp)) {
+							TransferCatalog(
+								transfers = emptyList(),
+								transferThumbnails = emptyMap(),
+								windowClass = WindowClass.Desktop,
+								onOpenComposer = {},
+								onTransferSelected = {},
+							)
+						}
+						Box(Modifier.size(500.dp)) {
+							ReceiveScreen(
+								coreState = CoreState(isInitialized = true),
+								state = ReceiveState(),
+								windowClass = WindowClass.Desktop,
+								actions = actions,
+								onOpenAcquisition = {},
+								onDismissAcquisition = {},
+								onReceiverNameChanged = {},
+								onInvitationResult = { _, _ -> },
+								onWaitingForNfc = {},
+								onReceive = {},
+								onRequestDeleteHistoryItem = {},
+								onRequestClearHistory = {},
+								onDismissHistoryDelete = {},
+								onConfirmHistoryDelete = {},
+							)
+						}
+						Box(Modifier.size(500.dp)) {
+							SettingsOverview(SettingsState(), onSectionSelected = {}, largeTitle = false)
+						}
+					}
+				}
+			}
+		}
+
+		onNodeWithTag("send-empty-icon").assertIsDisplayed()
+		onNodeWithTag("receive-empty-icon").assertIsDisplayed()
+		onAllNodesWithText("Transfers you’re sharing from this device.").assertCountEquals(0)
+		onAllNodesWithText("Transfers you’ve received on this device.").assertCountEquals(0)
+		onAllNodesWithText("Your name, where transfers are saved, appearance, and notifications.").assertCountEquals(0)
+	}
+
 	@Test
 	fun phoneSendEmptyStateOpensCreationDrawer() = runComposeUiTest {
 		val state = mutableStateOf(SendState())