fix: Prevent crash on cancelling quick refactor via progress widget

QuickRefactorHandler.cpp

@@ -385,25 +385,25 @@ void QuickRefactorHandler::handleLLMResponse(
 
 void QuickRefactorHandler::cancelRequest()
 {
-    if (m_isRefactoringInProgress) {
-        auto id = m_lastRequestId;
-
-        for (auto it = m_activeRequests.begin(); it != m_activeRequests.end(); ++it) {
-            if (it.key() == id) {
-                const RequestContext &ctx = it.value();
-                ctx.provider->cancelRequest(id);
-                m_activeRequests.erase(it);
-                break;
-            }
-        }
+    if (!m_isRefactoringInProgress)
+        return;
 
+    const auto id = m_lastRequestId;
     m_isRefactoringInProgress = false;
+    m_lastRequestId = {};
+
+    auto it = m_activeRequests.find(id);
+    if (it != m_activeRequests.end()) {
+        auto provider = it.value().provider;
+        m_activeRequests.erase(it);
+        if (provider)
+            provider->cancelRequest(id);
+    }
 
     RefactorResult result;
     result.success = false;
     result.errorMessage = "Refactoring request was cancelled";
     emit refactoringCompleted(result);
-    }
 }
 
 void QuickRefactorHandler::handleFullResponse(const QString &requestId, const QString &fullText)

widgets/ProgressWidget.cpp

@@ -142,10 +142,12 @@ void ProgressWidget::leaveEvent(QEvent *event)
 void ProgressWidget::mousePressEvent(QMouseEvent *event)
 {
     if (event->button() == Qt::LeftButton && m_isHovered) {
+        event->accept();
+        auto callback = m_cancelCallback;
         emit cancelRequested();
-        if (m_cancelCallback) {
-            m_cancelCallback();
-        }
+        if (callback)
+            callback();
+        return;
     }
     QWidget::mousePressEvent(event);
 }