fix: truncate context logic

Plugins/ZShell/Llm/chat.hpp

@@ -14,9 +14,6 @@ namespace ZShell::llm {
 
 class LlmClient;
 
-// QML-facing facade. Persistence lives in ChatStore, network streaming in
-// LlmClient; this class only wires them together and exposes the
-// application-wide state.
 class Chat : public QObject {
 	Q_OBJECT
 	QML_ELEMENT
@@ -55,6 +52,7 @@ class Chat : public QObject {
 	Q_INVOKABLE void stop();
 	Q_INVOKABLE void dismissError();
 	Q_INVOKABLE void refreshModels();
+	Q_INVOKABLE void refreshFromServer();
 	Q_INVOKABLE void selectModel(const QString& id);
 
 	static Chat* create(QQmlEngine*, QJSEngine*);