清除无用引用

win_text_editor/lib/app/components/file_explorer.dart

@@ -1,9 +1,6 @@
-import 'dart:io';
-
 import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import 'package:win_text_editor/app/providers/logger.dart';
 
 import '../models/file_node.dart';
 import '../providers/file_provider.dart';

win_text_editor/lib/app/providers/editor_provider.dart

@@ -104,7 +104,7 @@ class EditorProvider with ChangeNotifier {
         if (!_tabLoadingStates[tabId]!) break; // 检查是否取消
 
         final chunkLines = lines.sublist(i, min(i + linesPerChunk, lines.length));
-        _tabs[index].chunks!.addAll(chunkLines);
+        _tabs[index].chunks.addAll(chunkLines);
 
         notifyListeners();
         await Future.delayed(Duration.zero); // 让UI更新