feat(apple): send files to a remembered device

Adds the Send files action to the device detail, routing the picked
selection through sendToContact.

Rather than a second picker path, sharePickedFiles now takes a
ShareDestination, so the macOS security-scoped access handling covers both
routes. A contact destination carries no access policy, matching the core's
rule that an offer share is never public.

apple/VniDrop/App/AppGraph.swift

@@ -31,7 +31,8 @@ final class AppGraph: ObservableObject {
 		self.contactsModel = ContactsModel(
 			repository: coreRepository,
 			messages: messages,
-			preferences: preferencesRepository
+			preferences: preferencesRepository,
+			fileSystemService: dependencies.fileSystemService
 		)
 		self.approvalCoordinator = ApprovalCoordinator(
 			repository: coreRepository,

apple/VniDrop/Core/CoreModels.swift

@@ -72,6 +72,16 @@ enum ShareAccessPolicy: Equatable, Sendable {
 	case anyoneWithTransfer
 }
 
+/// Where a picked selection is going.
+///
+/// A contact destination deliberately carries no access policy: the core forces
+/// approval-required for offers, so exposing the choice here would imply a
+/// setting that does not exist.
+enum ShareDestination: Equatable, Sendable {
+	case invitation(accessPolicy: ShareAccessPolicy)
+	case contact(endpointId: String)
+}
+
 enum TransferDirection: Equatable, Sendable {
 	case send
 	case receive

apple/VniDrop/Core/FileSystemService.swift

@@ -33,12 +33,15 @@ protocol FileSystemService {
 	func revealReceiveFolder(_ folder: ReceiveFolder) async -> Result<Void, Error>
 	/// Releases only app-owned picker copies; never deletes original user sources.
 	func discardPickedFiles(_ files: [PickedShareFile]) async
+	/// Imports a picked selection, either as an invitation or straight to a
+	/// remembered device. One entry point so the platform's security-scoped
+	/// access handling covers both.
 	func sharePickedFiles(
 		repository: CoreGateway,
 		files: [PickedShareFile],
 		transferName: String,
 		senderName: String,
-		accessPolicy: ShareAccessPolicy
+		destination: ShareDestination
 	) async -> Result<Share, Error>
 }
 

apple/VniDrop/Features/Contacts/ContactsModel.swift

@@ -52,19 +52,28 @@ struct ContactsState: Equatable {
 final class ContactsModel: ObservableObject {
 	@Published private(set) var state = ContactsState()
 
+	/// Set when the detail screen asks for a file picker; the platform picker
+	/// modifier observes it, mirroring `SendModel`.
+	@Published var pendingFilePick = false
+	/// Device the picked files are destined for.
+	@Published private(set) var sendTarget: String?
+
 	private let repository: CoreGateway
 	private let messages: UiMessageController
 	private let preferences: AppPreferencesRepository
+	private let fileSystemService: FileSystemService
 	private var cancellables = Set<AnyCancellable>()
 
 	init(
 		repository: CoreGateway,
 		messages: UiMessageController,
-		preferences: AppPreferencesRepository
+		preferences: AppPreferencesRepository,
+		fileSystemService: FileSystemService
 	) {
 		self.repository = repository
 		self.messages = messages
 		self.preferences = preferences
+		self.fileSystemService = fileSystemService
 		state.grantLifetime = preferences.preferences.grantLifetime
 
 		repository.signals
@@ -247,6 +256,48 @@ final class ContactsModel: ObservableObject {
 		return ticket
 	}
 
+	// MARK: - Sending to a device
+
+	/// Start choosing files to send to a remembered device.
+	func chooseFilesToSend(to endpointId: String) {
+		sendTarget = endpointId
+		pendingFilePick = true
+	}
+
+	func onFilePickFailed(_ reason: String) {
+		sendTarget = nil
+		messages.error(InvitationError.raw(reason))
+	}
+
+	/// Send the picked selection straight to the chosen device.
+	///
+	/// Only the receiving user is prompted; this call returns once they have
+	/// answered, so the button stays busy until then.
+	func onFilesPicked(_ files: [PickedShareFile]) async {
+		guard let endpointId = sendTarget else { return }
+		sendTarget = nil
+		guard !files.isEmpty else { return }
+
+		state.busyEndpoints.insert(endpointId)
+		defer { state.busyEndpoints.remove(endpointId) }
+
+		let result = await fileSystemService.sharePickedFiles(
+			repository: repository,
+			files: files,
+			transferName: files.count == 1 ? files[0].displayName : "",
+			senderName: preferences.preferences.username,
+			destination: .contact(endpointId: endpointId)
+		)
+		await fileSystemService.discardPickedFiles(files)
+		switch result {
+		case .success:
+			messages.tryShow(UiMessage(text: .resource(L10n.Send.transferCreated), tone: .success))
+			await refresh()
+		case .failure(let error):
+			messages.error(error)
+		}
+	}
+
 	// MARK: - Management
 
 	func setLabel(endpointId: String, label: String) async {

apple/VniDrop/Features/Contacts/ContactsScreen.swift

@@ -220,7 +220,19 @@ struct ContactDetailScreen: View {
 						.textSelection(.enabled)
 				}
 
-				if !contact.canSend {
+				if contact.canSend {
+					Section {
+						Button {
+							model.chooseFilesToSend(to: endpointId)
+						} label: {
+							Label(
+								String(localized: L10n.Contacts.sendTo),
+								systemSymbol: .paperplane
+							)
+						}
+						.disabled(model.state.busyEndpoints.contains(endpointId))
+					}
+				} else {
 					Section {
 						Label(
 							String(localized: L10n.Contacts.unreachableBody),
@@ -247,6 +259,7 @@ struct ContactDetailScreen: View {
 		}
 		.formStyle(.grouped)
 		.navigationTitle(Text(contact?.displayName ?? ""))
+		.contactSendPickers(model: model)
 		.onAppear { label = contact?.localLabel ?? "" }
 		.onDisappear { commitLabel() }
 		.confirmationDialog(

apple/VniDrop/Features/Send/SendModel.swift

@@ -353,7 +353,7 @@ final class SendModel: ObservableObject {
 				files: current.selectedFiles,
 				transferName: current.transferName.trimmingCharacters(in: .whitespacesAndNewlines),
 				senderName: current.senderName.trimmingCharacters(in: .whitespacesAndNewlines),
-				accessPolicy: current.accessPolicy
+				destination: .invitation(accessPolicy: current.accessPolicy)
 			)
 			switch result {
 			case .success(let share):

apple/VniDrop/Platform/FileSystemService+iOS.swift

@@ -59,15 +59,23 @@ struct IosFileSystemService: FileSystemService {
 		files: [PickedShareFile],
 		transferName: String,
 		senderName: String,
-		accessPolicy: ShareAccessPolicy
+		destination: ShareDestination
 	) async -> Result<Share, Error> {
 		guard !files.isEmpty else {
 			return .failure(InvitationError.shareEmpty)
 		}
 		let sources = files.map { $0.toIosShareSource() }
-		return await repository.shareSources(
-			sources, transferName: transferName, senderName: senderName, accessPolicy: accessPolicy
-		)
+		switch destination {
+		case .invitation(let accessPolicy):
+			return await repository.shareSources(
+				sources, transferName: transferName, senderName: senderName, accessPolicy: accessPolicy
+			)
+		case .contact(let endpointId):
+			return await repository.sendToContact(
+				endpointId: endpointId, sources: sources,
+				transferName: transferName, senderName: senderName
+			)
+		}
 	}
 
 	private func validateSecurityScopedUrl(_ value: String) -> FolderAccessStatus {

apple/VniDrop/Platform/FileSystemService+macOS.swift

@@ -39,7 +39,7 @@ struct MacFileSystemService: FileSystemService {
 		files: [PickedShareFile],
 		transferName: String,
 		senderName: String,
-		accessPolicy: ShareAccessPolicy
+		destination: ShareDestination
 	) async -> Result<Share, Error> {
 		guard !files.isEmpty else {
 			return .failure(InvitationError.shareEmpty)
@@ -63,9 +63,17 @@ struct MacFileSystemService: FileSystemService {
 		let sources = files.map {
 			ShareSource(kind: .path, value: $0.value, displayName: $0.displayName, isDirectory: $0.isDirectory)
 		}
-		return await repository.shareSources(
-			sources, transferName: transferName, senderName: senderName, accessPolicy: accessPolicy
-		)
+		switch destination {
+		case .invitation(let accessPolicy):
+			return await repository.shareSources(
+				sources, transferName: transferName, senderName: senderName, accessPolicy: accessPolicy
+			)
+		case .contact(let endpointId):
+			return await repository.sendToContact(
+				endpointId: endpointId, sources: sources,
+				transferName: transferName, senderName: senderName
+			)
+		}
 	}
 }
 #endif

apple/VniDrop/Platform/PlatformPickers.swift

@@ -70,6 +70,33 @@ struct SendPickers: ViewModifier {
 	}
 }
 
+/// File picker for "send to this device", reusing the share picker's selection
+/// handling so security-scoped bookmarks are captured the same way.
+struct ContactSendPickers: ViewModifier {
+	@ObservedObject var model: ContactsModel
+
+	func body(content: Content) -> some View {
+		content
+			.fileImporter(
+				isPresented: $model.pendingFilePick,
+				allowedContentTypes: [.item],
+				allowsMultipleSelection: true
+			) { result in
+				switch result {
+				case .success(let urls):
+					let files = urls.compactMap { PickerSupport.pickedFile(from: $0, isDirectory: false) }
+					if files.isEmpty {
+						model.onFilePickFailed("The selected document could not be opened")
+					} else {
+						Task { await model.onFilesPicked(files) }
+					}
+				case .failure(let error):
+					if !error.isUserCancellation { model.onFilePickFailed(error.technicalDetail) }
+				}
+			}
+	}
+}
+
 enum PickerSupport {
 	static func receiveFolder(from url: URL) -> ReceiveFolder {
 		#if os(iOS)
@@ -129,4 +156,8 @@ extension View {
 	func sendPickers(model: SendModel) -> some View {
 		modifier(SendPickers(model: model))
 	}
+
+	func contactSendPickers(model: ContactsModel) -> some View {
+		modifier(ContactSendPickers(model: model))
+	}
 }