feat: add stop downloads control

Sources/Firelink/ContentView.swift

@@ -84,6 +84,15 @@ struct ContentView: View {
                 }
             }
 
+            ToolbarItem {
+                Button {
+                    controller.pauseActiveDownloads(queueID: queueID)
+                } label: {
+                    Label("Stop Downloads", systemImage: "stop.fill")
+                }
+                .disabled(!hasActiveDownloads(in: queueID))
+            }
+
             ToolbarItemGroup {
                 if !selectedItems.isEmpty {
                     if selectedItems.contains(where: { $0.status == .downloading }) {
@@ -173,6 +182,14 @@ struct ContentView: View {
         selection = Set(items.map { $0.id })
     }
 
+    private func hasActiveDownloads(in queueID: UUID?) -> Bool {
+        if let queueID {
+            return controller.downloads.contains { $0.status == .downloading && $0.queueID == queueID }
+        }
+
+        return controller.activeCount > 0
+    }
+
     private func filteredDownloads(for filter: DownloadSidebarFilter) -> [DownloadItem] {
         switch filter {
         case .all:

Sources/Firelink/DownloadController.swift

@@ -189,6 +189,31 @@ final class DownloadController: ObservableObject {
         pumpQueue()
     }
 
+    func pauseActiveDownloads(queueID: UUID? = nil) {
+        let targetQueueID = queueID.map(normalizedQueueID)
+        let activeItems = downloads.filter { item in
+            item.status == .downloading && (targetQueueID == nil || item.queueID == targetQueueID)
+        }
+
+        guard !activeItems.isEmpty else { return }
+
+        for item in activeItems {
+            activeHandles[item.id]?.cancel()
+            activeHandles[item.id] = nil
+            update(item.id) {
+                $0.status = .paused
+                $0.message = "Paused. Resume will continue from the partial file."
+                $0.autoResumeOnLaunch = false
+            }
+            automaticRetryCounts[item.id] = nil
+        }
+
+        engineMessage = "Paused \(activeItems.count) active download\(activeItems.count == 1 ? "" : "s")."
+        saveDownloads()
+        updateSleepActivity()
+        pumpQueue()
+    }
+
     func queue(_ item: DownloadItem) {
         activeHandles[item.id]?.cancel()
         activeHandles[item.id] = nil

Sources/Firelink/FirelinkApp.swift

@@ -63,6 +63,11 @@ struct FirelinkApp: App {
                     controller.startQueue()
                 }
                 .keyboardShortcut("r", modifiers: [.command])
+
+                Button("Stop Downloads") {
+                    controller.pauseActiveDownloads()
+                }
+                .disabled(controller.activeCount == 0)
             }
         }