feat(apple): generate type-safe L10n accessors and migrate all key literals

Replaces every stringly-typed localization key in the Apple app with
compile-time-checked accessors generated from localization/strings.json.
A mistyped key is now a build error instead of a silent fallback to the
raw key at runtime. The runtime path is unchanged: plain keys are
String.LocalizationValue constants resolved with String(localized:) and
Apple's String Catalog still does the lookup; keys with arguments become
typed, named functions applying args through String(format:).

Generator: new renderSwiftAccessors emits apple/VniDrop/Generated/L10n.swift,
wired into generate. Renamed generic arg1/arg2 tokens on four keys to
semantic names (receiver, transferName, deviceId) and updated their context
notes; positional output is unchanged so .xcstrings (bar the 4 comments)
and the Android XML regenerate identical.

Migration: every key-carrying value flipped to String.LocalizationValue
end to end, resolved only at the leaf. Zero key literals and zero
LocalizedStringKey remain in app or test code. macOS build passes; iOS
test run pending.

apple/VniDrop/Features/Receive/ReceiveInvitationActions.swift

@@ -2,7 +2,7 @@ import SwiftUI
 
 enum ReceiveMethodAvailability { case available, unavailable, hidden }
 
-/// Invitation acquisition actions shared by the native Apple feature models.
+/// Invitation acquisition actions, ported from `ReceiveInvitationActions` (iosMain).
 @MainActor
 protocol ReceiveInvitationActions: AnyObject {
 	var fileAvailability: ReceiveMethodAvailability { get }
@@ -23,25 +23,25 @@ struct ReceiveMethodPanel: View {
 
 	var body: some View {
 		VStack(alignment: .leading, spacing: 12) {
-			Text(LocalizedStringKey("receive_choose_method_title")).font(VniType.titleLarge)
-			Text(LocalizedStringKey("receive_choose_method_body")).foregroundStyle(colors.foregroundLighter)
+			Text(String(localized: L10n.Receive.chooseMethodTitle)).font(VniType.titleLarge)
+			Text(String(localized: L10n.Receive.chooseMethodBody)).foregroundStyle(colors.foregroundLighter)
 
 			MethodRow(
-				icon: "doc", titleKey: "receive_method_file", descKey: "receive_method_file_description",
+				icon: "doc", titleKey: L10n.Receive.methodFile, descKey: L10n.Receive.methodFileDescription,
 				availability: actions.fileAvailability
 			) { actions.pickInvitation { model.onInvitationResult(.invitationFile, $0) } }
 
 			if actions.qrAvailability != .hidden {
 				MethodRow(
-					icon: "qrcode.viewfinder", titleKey: "receive_method_scan", descKey: "receive_method_scan_description",
+					icon: "qrcode.viewfinder", titleKey: L10n.Receive.methodScan, descKey: L10n.Receive.methodScanDescription,
 					availability: actions.qrAvailability
 				) { actions.scanQrCode { model.onInvitationResult(.qrCode, $0) } }
 			}
 			if actions.nfcAvailability != .hidden {
 				MethodRow(
 					icon: "wave.3.right",
-					titleOverride: model.state.isWaitingForNfc ? String(localized: "receive_nfc_waiting") : nil,
-					titleKey: "receive_method_nfc", descKey: "receive_method_nfc_description",
+					titleOverride: model.state.isWaitingForNfc ? String(localized: L10n.Receive.nfcWaiting) : nil,
+					titleKey: L10n.Receive.methodNfc, descKey: L10n.Receive.methodNfcDescription,
 					availability: model.state.isWaitingForNfc ? .unavailable : actions.nfcAvailability
 				) {
 					model.setWaitingForNfc(true)
@@ -58,8 +58,8 @@ private struct MethodRow: View {
 	@Environment(\.vniColors) private var colors
 	let icon: String
 	var titleOverride: String? = nil
-	let titleKey: String
-	let descKey: String
+	let titleKey: String.LocalizationValue
+	let descKey: String.LocalizationValue
 	let availability: ReceiveMethodAvailability
 	let onTap: () -> Void
 
@@ -74,13 +74,13 @@ private struct MethodRow: View {
 					if let titleOverride {
 						Text(titleOverride).font(VniType.bodyLarge)
 					} else {
-						Text(LocalizedStringKey(titleKey)).font(VniType.bodyLarge)
+						Text(String(localized: titleKey)).font(VniType.bodyLarge)
 					}
-					Text(LocalizedStringKey(descKey)).font(VniType.bodySmall).foregroundStyle(colors.foregroundLighter)
+					Text(String(localized: descKey)).font(VniType.bodySmall).foregroundStyle(colors.foregroundLighter)
 				}
 				Spacer()
 				if availability == .unavailable {
-					Text(LocalizedStringKey("value_unavailable")).font(VniType.labelSmall).foregroundStyle(colors.foregroundLighter)
+					Text(String(localized: L10n.Value.unavailable)).font(VniType.labelSmall).foregroundStyle(colors.foregroundLighter)
 				}
 			}
 			.padding(16)
@@ -102,7 +102,7 @@ struct InvitationReviewPanel: View {
 
 	var body: some View {
 		VStack(alignment: .leading, spacing: 14) {
-			Text(LocalizedStringKey("receive_review_title")).font(VniType.titleLarge)
+			Text(String(localized: L10n.Receive.reviewTitle)).font(VniType.titleLarge)
 			if state.isInspecting {
 				ProgressView().frame(maxWidth: .infinity).padding(40)
 			}
@@ -110,16 +110,16 @@ struct InvitationReviewPanel: View {
 				let metadata = inspection.metadata
 				VStack(alignment: .leading, spacing: 8) {
 					Text(metadata.transferName).font(VniType.bodyLarge).lineLimit(2)
-					Text("\(metadata.fileCount) \(String(localized: "metadata_files").lowercased()) · \(formatBytes(metadata.totalSize))")
+					Text("\(metadata.fileCount) \(String(localized: L10n.Metadata.files).lowercased()) · \(formatBytes(metadata.totalSize))")
 						.foregroundStyle(colors.foregroundLighter)
 				}
 				.padding(16)
 				.frame(maxWidth: .infinity, alignment: .leading)
 				.background(colors.backgroundSurface200, in: RoundedRectangle(cornerRadius: 14))
 
-				Field(label: String(localized: "field_receiver_name"),
+				Field(label: String(localized: L10n.Field.receiverName),
 					  value: Binding(get: { state.receiverName }, set: { model.setReceiverName($0) }))
-				Text(state.receiveFolder?.displayName ?? String(localized: "value_unavailable"))
+				Text(state.receiveFolder?.displayName ?? String(localized: L10n.Value.unavailable))
 					.font(VniType.bodySmall)
 					.foregroundStyle(state.folderAccessStatus == .writable ? colors.foregroundLight : colors.destructiveDefault)
 
@@ -127,11 +127,11 @@ struct InvitationReviewPanel: View {
 					let progressId = state.activeReceiveTransferId
 						?? model.coreState.events.first { $0.direction == "receive" && $0.transferId != nil }?.transferId
 					let progress = progressId.flatMap { progressForTransfer(events: model.coreState.events, transferId: $0) }
-					ProgressRow(labelKey: progress?.labelKey ?? "progress_receiving", progress: progress?.progress, detail: progress?.detail)
-					SecondaryButton(title: String(localized: "button_cancel_receive"), action: model.cancelActiveReceive)
+					ProgressRow(labelKey: progress?.labelKey ?? L10n.Progress.receiving, progress: progress?.progress, detail: progress?.detail)
+					SecondaryButton(title: String(localized: L10n.Button.cancelReceive), action: model.cancelActiveReceive)
 				} else {
 					PrimaryButton(
-						title: String(localized: "button_receive"), action: model.receive,
+						title: String(localized: L10n.Button.receive), action: model.receive,
 						enabled: state.canReceive(coreInitialized: model.coreState.isInitialized)
 					)
 				}

apple/VniDrop/Features/Receive/ReceiveModel.swift

@@ -133,7 +133,7 @@ final class ReceiveModel: ObservableObject {
 			case .success:
 				state.historyDeleteTarget = nil
 				state.isDeletingHistory = false
-				let key = target == .all ? "receive_history_cleared" : "transfer_deleted"
+				let key = target == .all ? L10n.Receive.historyCleared : L10n.Transfer.deleted
 				messages.tryShow(UiMessage(text: .resource(key), tone: .success))
 			case .failure(let error):
 				state.isDeletingHistory = false
@@ -173,9 +173,9 @@ final class ReceiveModel: ObservableObject {
 				resetAcquisition()
 				let canReveal = fileSystemService.canRevealReceiveFolder(folder)
 				messages.tryShow(UiMessage(
-					text: .resource("receive_completed"),
+					text: .resource(L10n.Receive.completed),
 					tone: .success,
-					actionLabel: canReveal ? .resource("button_show_in_files") : nil,
+					actionLabel: canReveal ? .resource(L10n.Button.showInFiles) : nil,
 					onAction: canReveal ? { self.revealReceiveFolder(folder) } : nil
 				))
 			case .failure(let error):
@@ -192,8 +192,8 @@ final class ReceiveModel: ObservableObject {
 				messages.tryShow(UiMessage(
 					text: uiText,
 					tone: .error,
-					actionLabel: error.canRetryWithoutChangingInput ? .resource("button_retry") : nil,
-					onAction: error.canRetryWithoutChangingInput ? { self.receive() } : nil
+					actionLabel: .resource(L10n.Button.retry),
+					onAction: { self.receive() }
 				))
 			}
 		}
@@ -222,14 +222,14 @@ final class ReceiveModel: ObservableObject {
 		Task {
 			let result = await fileSystemService.revealReceiveFolder(folder)
 			if case .failure = result {
-				messages.show(UiMessage(text: .resource("receive_open_files_failed"), tone: .error))
+				messages.show(UiMessage(text: .resource(L10n.Receive.openFilesFailed), tone: .error))
 			}
 		}
 	}
 
 	private func inspectInvitation(_ method: ReceiveMethod, _ raw: String) {
 		let ticket = raw.trimmingCharacters(in: .whitespacesAndNewlines)
-		if ticket.isEmpty { return messages.error(.resource("error_invitation_empty")) }
+		if ticket.isEmpty { return messages.error(.resource(L10n.Error.invitationEmpty)) }
 		state.isAcquisitionOpen = true
 		state.ticket = ticket
 		state.method = method

apple/VniDrop/Features/Receive/ReceiveScreen.swift

@@ -22,17 +22,17 @@ struct ReceiveScreen: View {
 					history
 				}
 			}
-			.navigationTitle(Text(LocalizedStringKey("receive_title")))
+			.navigationTitle(Text(String(localized: L10n.Receive.title)))
 			.toolbar {
 				ToolbarItem(placement: .primaryAction) {
 					Button(action: model.openAcquisition) {
-						Label(String(localized: "button_receive_files"), systemImage: "plus")
+						Label(String(localized: L10n.Button.receiveFiles), systemImage: "plus")
 					}
 				}
 				if !deletable.isEmpty {
 					ToolbarItem(placement: .primaryAction) {
 						Button(role: .destructive, action: model.requestClearHistory) {
-							Label(String(localized: "receive_clear_history"), systemImage: "trash")
+							Label(String(localized: L10n.Receive.clearHistory), systemImage: "trash")
 						}
 					}
 				}
@@ -50,11 +50,11 @@ struct ReceiveScreen: View {
 			}
 		}
 		.alert(
-			Text(LocalizedStringKey(clearAllPending ? "receive_clear_history_title" : "receive_delete_history_title")),
+			Text(String(localized: clearAllPending ? L10n.Receive.clearHistoryTitle : L10n.Receive.deleteHistoryTitle)),
 			isPresented: Binding(get: { model.state.historyDeleteTarget != nil }, set: { if !$0 { Task { @MainActor in model.dismissHistoryDelete() } } })
 		) {
-			Button(String(localized: "button_cancel"), role: .cancel, action: model.dismissHistoryDelete)
-			Button(String(localized: clearAllPending ? "receive_clear_history" : "button_delete_transfer"),
+			Button(String(localized: L10n.Button.cancel), role: .cancel, action: model.dismissHistoryDelete)
+			Button(String(localized: clearAllPending ? L10n.Receive.clearHistory : L10n.Button.deleteTransfer),
 				   role: .destructive, action: model.confirmHistoryDelete)
 		} message: {
 			historyDeleteMessage
@@ -74,27 +74,27 @@ struct ReceiveScreen: View {
 							Button(role: .destructive) {
 								model.requestDeleteHistoryItem(transfer.transferId)
 							} label: {
-								Label(String(localized: "button_delete_transfer"), systemImage: "trash")
+								Label(String(localized: L10n.Button.deleteTransfer), systemImage: "trash")
 							}
 						}
 					}
 				}
 			} header: {
-				Text(LocalizedStringKey("receive_history_title"))
+				Text(String(localized: L10n.Receive.historyTitle))
 			} footer: {
-				Text(LocalizedStringKey("receive_new_subtitle"))
+				Text(String(localized: L10n.Receive.newSubtitle))
 			}
 		}
 	}
 
 	private var emptyState: some View {
 		ContentUnavailableView {
-			Label(String(localized: "receive_empty_title"), systemImage: "tray.and.arrow.down")
+			Label(String(localized: L10n.Receive.emptyTitle), systemImage: "tray.and.arrow.down")
 		} description: {
-			Text(LocalizedStringKey("receive_empty_body"))
+			Text(String(localized: L10n.Receive.emptyBody))
 		} actions: {
 			Button(action: model.openAcquisition) {
-				Label(String(localized: "button_receive_files"), systemImage: "plus")
+				Label(String(localized: L10n.Button.receiveFiles), systemImage: "plus")
 			}
 			.buttonStyle(.borderedProminent)
 			.controlSize(.large)
@@ -107,10 +107,10 @@ struct ReceiveScreen: View {
 	private var historyDeleteMessage: some View {
 		if let target = model.state.historyDeleteTarget {
 			if target == .all {
-				Text(LocalizedStringKey("receive_clear_history_description"))
+				Text(String(localized: L10n.Receive.clearHistoryDescription))
 			} else {
-				Text(String(format: String(localized: "receive_delete_history_description"),
-							 transferName(for: target) ?? String(localized: "receive_unknown_transfer")))
+				Text(L10n.Receive.deleteHistoryDescription(
+					transferName: transferName(for: target) ?? String(localized: L10n.Receive.unknownTransfer)))
 			}
 		}
 	}
@@ -134,7 +134,7 @@ private struct ReceiveTransferRow: View {
 				.frame(width: 40, height: 40)
 				.background(.quaternary, in: RoundedRectangle(cornerRadius: 9))
 			VStack(alignment: .leading, spacing: 3) {
-				Text(transfer.transferName ?? String(localized: "receive_unknown_transfer"))
+				Text(transfer.transferName ?? String(localized: L10n.Receive.unknownTransfer))
 					.font(.body).lineLimit(1)
 				Text("\(formatBytes(transfer.totalSize)) · \(statusLabel(transfer.status))")
 					.font(.caption).foregroundStyle(.secondary)