fix: saf download

lib/services/download_storage_service.dart

@@ -556,6 +556,7 @@ class DownloadStorageService {
 
   /// Copy a file from temp cache to SAF and return the SAF URI
   /// Returns null if SAF is not available or copy fails
+  /// Always cleans up temp file regardless of success/failure
   Future<String?> copyToSaf(
     String tempFilePath,
     List<String> pathComponents,
@@ -566,34 +567,37 @@ class DownloadStorageService {
 
     final safService = SafStorageService.instance;
 
-    // Create nested directory structure in SAF
-    final targetDirUri = await safService.createNestedDirectories(
-      _customDownloadPath!,
-      pathComponents,
-    );
+    try {
+      // Create nested directory structure in SAF
+      final targetDirUri = await safService.createNestedDirectories(
+        _customDownloadPath!,
+        pathComponents,
+      );
 
-    if (targetDirUri == null) {
-      return null;
-    }
+      if (targetDirUri == null) {
+        return null;
+      }
 
-    // Copy the file to SAF
-    final safUri = await safService.copyFileToSaf(
-      tempFilePath,
-      targetDirUri,
-      fileName,
-      mimeType,
-    );
+      // Copy the file to SAF using native copy
+      final safUri = await safService.copyFileToSaf(
+        tempFilePath,
+        targetDirUri,
+        fileName,
+        mimeType,
+      );
 
-    // Delete temp file after successful copy
-    if (safUri != null) {
+      return safUri;
+    } finally {
+      // Always clean up temp file regardless of success/failure
       try {
-        await File(tempFilePath).delete();
+        final tempFile = File(tempFilePath);
+        if (await tempFile.exists()) {
+          await tempFile.delete();
+        }
       } catch (_) {
         // Ignore cleanup errors
       }
     }
-
-    return safUri;
   }
 
   /// Get the MIME type for a file extension

lib/services/saf_storage_service.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io';
 
 import 'package:flutter/foundation.dart';
@@ -138,7 +139,7 @@ class SafStorageService {
     }
   }
 
-  /// Copy a file from local storage to SAF directory using streaming
+  /// Copy a file from local storage to SAF directory using native copy
   /// Returns the SAF URI of the copied file, or null on failure
   Future<String?> copyFileToSaf(
     String sourceFilePath,
@@ -147,6 +148,7 @@ class SafStorageService {
     String mimeType,
   ) async {
     if (!isAvailable) return null;
+
     try {
       final sourceFile = File(sourceFilePath);
       if (!await sourceFile.exists()) {
@@ -154,27 +156,26 @@ class SafStorageService {
         return null;
       }
 
-      // Start a write stream session
-      final writeInfo = await _safStream.startWriteStream(
-        targetDirectoryUri,
-        fileName,
-        mimeType,
-      );
-      final sessionId = writeInfo.session;
+      // Use pasteLocalFile for native-side copy (no method channel streaming)
+      // This is much more efficient for large files and avoids hangs
+      final result = await _safStream
+          .pasteLocalFile(
+            sourceFilePath,
+            targetDirectoryUri,
+            fileName,
+            mimeType,
+            overwrite: true,
+          )
+          .timeout(
+            const Duration(minutes: 30),
+            onTimeout: () => throw TimeoutException('SAF copy timed out'),
+          );
 
-      final stream = sourceFile.openRead();
-
-      await for (final chunk in stream) {
-        await _safStream.writeChunk(sessionId, Uint8List.fromList(chunk));
-      }
-
-      // End the write stream
-      await _safStream.endWriteStream(sessionId);
-
-      debugPrint(
-        'SAF copyFileToSaf: successfully copied to $targetDirectoryUri/$fileName',
-      );
-      return writeInfo.fileResult.uri.toString();
+      debugPrint('SAF copyFileToSaf: successfully copied to ${result.uri}');
+      return result.uri.toString();
+    } on TimeoutException catch (e) {
+      debugPrint('SAF copyFileToSaf timeout: $e');
+      return null;
     } catch (e) {
       debugPrint('SAF copyFileToSaf error: $e');
       return null;