refactor: remove dead SAF copy methods

lib/services/download_storage_service.dart

@@ -8,7 +8,6 @@ import '../models/plex_metadata.dart';
 import '../utils/app_logger.dart';
 import '../utils/formatters.dart';
 import 'settings_service.dart';
-import 'saf_storage_service.dart';
 
 class DownloadStorageService {
   static DownloadStorageService? _instance;
@@ -512,37 +511,6 @@ class DownloadStorageService {
     return path.join(cacheDir.path, fileName);
   }
 
-  /// 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, String fileName, String mimeType) async {
-    if (!isUsingSaf || _customDownloadPath == null) return null;
-
-    final safService = SafStorageService.instance;
-
-    try {
-      // Create nested directory structure in SAF
-      final targetDirUri = await safService.createNestedDirectories(_customDownloadPath!, pathComponents);
-
-      if (targetDirUri == null) {
-        return null;
-      }
-
-      // Copy the file to SAF using native copy
-      return await safService.copyFileToSaf(tempFilePath, targetDirUri, fileName, mimeType);
-    } finally {
-      // Always clean up temp file regardless of success/failure
-      try {
-        final tempFile = File(tempFilePath);
-        if (await tempFile.exists()) {
-          await tempFile.delete();
-        }
-      } catch (_) {
-        // Ignore cleanup errors
-      }
-    }
-  }
-
   /// Get the MIME type for a file extension
   String getMimeType(String extension) {
     switch (extension.toLowerCase()) {

lib/services/saf_storage_service.dart

@@ -3,7 +3,6 @@ import 'dart:io';
 
 import 'package:flutter/foundation.dart';
 import 'package:saf_util/saf_util.dart';
-import '../utils/future_extensions.dart';
 import '../utils/platform_detector.dart';
 import 'package:saf_util/saf_util_platform_interface.dart';
 import 'package:saf_stream/saf_stream.dart';
@@ -130,40 +129,6 @@ class SafStorageService {
     }
   }
 
-  /// 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,
-    String targetDirectoryUri,
-    String fileName,
-    String mimeType,
-  ) async {
-    if (!isAvailable) return null;
-
-    try {
-      final sourceFile = File(sourceFilePath);
-      if (!await sourceFile.exists()) {
-        debugPrint('SAF copyFileToSaf: source file does not exist');
-        return null;
-      }
-
-      // 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)
-          .namedTimeout(const Duration(minutes: 30), operation: 'SAF copy');
-
-      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;
-    }
-  }
-
   /// Write bytes directly to a SAF file
   /// Returns the SAF URI of the created file, or null on failure
   Future<String?> writeFileBytes(String directoryUri, String fileName, String mimeType, Uint8List bytes) async {