tidy signal handling

tabwidget.cpp

@@ -70,9 +70,6 @@ int TabWidget::openDocument(const QString &filePath)
     SciEdit *editor = createEditor();
     m_editors[docId] = editor;
     
-    // 临时断开信号连接，避免setText触发textChanged导致文档被标记为已修改
-    disconnectEditorSignals(editor);
-    
     // 设置编辑器内容
     QString content = m_documentManager->getDocumentContent(docId);
     const QByteArray contentBytes = content.toUtf8();
@@ -243,7 +240,6 @@ bool TabWidget::closeTab(int index)
     // 清理编辑器和文档
     if (m_editors.contains(docId)) {
         SciEdit *editor = m_editors[docId];
-        disconnectEditorSignals(editor);
         m_editors.remove(docId);
     }
     
@@ -435,11 +431,3 @@ void TabWidget::connectEditorSignals(SciEdit *editor)
         connect(editor, &ScintillaEditBase::savePointChanged, this, &TabWidget::onEditorSavePointChanged);
     }
 }
-
-void TabWidget::disconnectEditorSignals(SciEdit *editor)
-{
-    if (editor) {
-        disconnect(editor, &SciEdit::textChanged, this, &TabWidget::onEditorTextChanged);
-        disconnect(editor, &ScintillaEditBase::savePointChanged, this, &TabWidget::onEditorSavePointChanged);
-    }
-}