Restore the model when switching chats.

chat.cpp

@@ -127,13 +127,14 @@ bool Chat::isRecalc() const
 
 void Chat::unload()
 {
+    m_savedModelName = m_llmodel->modelName();
     stopGenerating();
     emit unloadRequested();
 }
 
 void Chat::reload()
 {
-    emit reloadRequested();
+    emit reloadRequested(m_savedModelName);
 }
 
 void Chat::generatedNameChanged()

chat.h

@@ -72,7 +72,7 @@ Q_SIGNALS:
     void setThreadCountRequested(int32_t threadCount);
     void recalcChanged();
     void unloadRequested();
-    void reloadRequested();
+    void reloadRequested(const QString &modelName);
     void generateNameRequested();
 
 private Q_SLOTS:
@@ -86,6 +86,7 @@ private:
     QString m_id;
     QString m_name;
     QString m_userName;
+    QString m_savedModelName;
     ChatModel *m_chatModel;
     bool m_responseInProgress;
     int32_t m_desiredThreadCount;

chatllm.cpp

@@ -295,9 +295,12 @@ void ChatLLM::unload()
     emit isModelLoadedChanged();
 }
 
-void ChatLLM::reload()
+void ChatLLM::reload(const QString &modelName)
 {
-    loadModel();
+    if (modelName.isEmpty())
+        loadModel();
+    else
+        loadModelPrivate(modelName);
 }
 
 void ChatLLM::generateName()

chatllm.h

@@ -43,7 +43,7 @@ public Q_SLOTS:
     bool loadModel();
     void modelNameChangeRequested(const QString &modelName);
     void unload();
-    void reload();
+    void reload(const QString &modelName);
     void generateName();
 
 Q_SIGNALS: