fix: save dialog not appearing after recording on macOS/iOS

macOS:
- Replace deprecated NSSavePanel.begin(completionHandler:) with async begin() API
- The old API has been deprecated since macOS 12 and may silently fail on macOS 26
- Added diagnostic logging throughout recording completion flow

iOS:
- Added diagnostic logging to track onRecordingSaved → pendingExportURL → sheet chain
- Logs file existence, size after recording completes

Diagnostic logging added to help verify the save dialog flow:
- macOS: file size check, showSaveDialog entry, NSSavePanel response
- iOS: recordStream output verification, onRecordingSaved call, sheet binding activation

Sources/HLSRecorder.swift

@@ -36,10 +36,13 @@ final class HLSRecorder: ObservableObject {
         recordTask = Task {
             do {
                 let outputURL = try await recordStream(url: url)
-                NSLog("[MiniPlayer] recordStream completed: %@", outputURL.path)
+                NSLog("[MiniPlayer] recordStream completed: %@, exists: %d", outputURL.path, FileManager.default.fileExists(atPath: outputURL.path))
+                let attrs = try? FileManager.default.attributesOfItem(atPath: outputURL.path)
+                NSLog("[MiniPlayer] Output file size: %lld", (attrs?[.size] as? Int64) ?? 0)
                 await MainActor.run {
                     self.isRecording = false
                     self.timer?.invalidate()
+                    NSLog("[MiniPlayer] Calling onRecordingSaved...")
                     self.onRecordingSaved?(outputURL)
                 }
             } catch is CancellationError {

Sources/MiniPlayerApp.swift

@@ -585,10 +585,15 @@ struct BricksAppView: View {
                 }
             }
             .sheet(isPresented: Binding<Bool>(
-                get: { bridge.pendingExportURL != nil },
+                get: {
+                    let has = bridge.pendingExportURL != nil
+                    if has { NSLog("[MiniPlayer] Sheet binding: pendingExportURL=%@", bridge.pendingExportURL?.lastPathComponent ?? "nil") }
+                    return has
+                },
                 set: { if !$0 { bridge.pendingExportURL = nil } }
             )) {
                 if let url = bridge.pendingExportURL {
+                    NSLog("[MiniPlayer] Presenting ActivityShareSheet for: %@", url.lastPathComponent)
                     ActivityShareSheet(url: url) {
                         bridge.pendingExportURL = nil
                     }

Sources/PlayerBridge.swift

@@ -178,8 +178,10 @@ final class PlayerBridge: ObservableObject {
         
         #if os(iOS)
         hlsRecorder.onRecordingSaved = { [weak self] url in
+            NSLog("[MiniPlayer] onRecordingSaved called, setting pendingExportURL: %@", url.lastPathComponent)
             self?.showToast("Saved: \(url.lastPathComponent)")
             self?.pendingExportURL = url
+            NSLog("[MiniPlayer] pendingExportURL set to: %@", url.lastPathComponent)
         }
         hlsRecorder.onError = { [weak self] msg in
             self?.showToast(msg)

Sources/PlayerRecorder.swift

@@ -62,10 +62,13 @@ final class PlayerRecorder: NSObject {
                 try await recorder.start(url: url, outputPath: tempURL.path, duration: 0)
                 // duration=0 表示无限录制，直到 stop() 被调用
                 // start 在 stop() 后会正常返回
-                NSLog("[Recorder] ✓ Recording completed: %@", tempURL.path)
+                NSLog("[Recorder] ✓ Recording completed: %@, file exists: %d", tempURL.path, FileManager.default.fileExists(atPath: tempURL.path))
+                let attrs = try? FileManager.default.attributesOfItem(atPath: tempURL.path)
+                NSLog("[Recorder] Output file size: %lld", (attrs?[.size] as? Int64) ?? 0)
                 await MainActor.run {
                     RecorderState.isFinalizing = false
                     self?.stopDurationTimer()
+                    NSLog("[Recorder] Calling showSaveDialog...")
                     self?.showSaveDialog(tempURL: tempURL)
                 }
             } catch {
@@ -129,6 +132,7 @@ final class PlayerRecorder: NSObject {
     // MARK: - 保存对话框
 
     private func showSaveDialog(tempURL: URL) {
+        NSLog("[Recorder] showSaveDialog called for: %@", tempURL.lastPathComponent)
         let panel = NSSavePanel()
         panel.allowedContentTypes = [.mpeg4Movie]
         // 默认文件名去掉 temp_ 前缀
@@ -136,25 +140,28 @@ final class PlayerRecorder: NSObject {
         panel.nameFieldStringValue = defaultName
         panel.directoryURL = saveDirectory
 
-        panel.begin { [weak self] response in
-            Task { @MainActor in
-                if response == .OK, let url = panel.url {
-                    do {
-                        if FileManager.default.fileExists(atPath: url.path) {
-                            try FileManager.default.removeItem(at: url)
-                        }
-                        try FileManager.default.moveItem(at: tempURL, to: url)
-                        NSLog("[Recorder] ✓ Saved: %@", url.path)
-                        self?.onRecordingSaved?(url)
-                    } catch {
-                        NSLog("[Recorder] ✗ Save failed: %@", error.localizedDescription)
-                        self?.onError?("Save failed: \(error.localizedDescription)")
+        // NSSavePanel.begin(completionHandler:) 已被 macOS 12 废弃，macOS 26 上可能静默失效
+        // 使用现代 async begin() API
+        Task { @MainActor [weak self] in
+            NSLog("[Recorder] NSSavePanel.begin() starting...")
+            let response = await panel.begin()
+            NSLog("[Recorder] NSSavePanel response: %d", response.rawValue)
+            if response == .OK, let url = panel.url {
+                do {
+                    if FileManager.default.fileExists(atPath: url.path) {
+                        try FileManager.default.removeItem(at: url)
                     }
-                } else {
-                    try? FileManager.default.removeItem(at: tempURL)
+                    try FileManager.default.moveItem(at: tempURL, to: url)
+                    NSLog("[Recorder] ✓ Saved: %@", url.path)
+                    self?.onRecordingSaved?(url)
+                } catch {
+                    NSLog("[Recorder] ✗ Save failed: %@", error.localizedDescription)
+                    self?.onError?("Save failed: \(error.localizedDescription)")
                 }
-                self?.checkPendingTerminate()
+            } else {
+                try? FileManager.default.removeItem(at: tempURL)
             }
+            self?.checkPendingTerminate()
         }
     }