fix: truncate webfetch content to fit context

Plugins/ZShell/Llm/llmclient.hpp

@@ -56,6 +56,13 @@ class LlmClient : public QObject {
 	void clearOnFinish(ChatSession* session);
 	void sessionRemoved(ChatSession* session);
 
+	// Tool calls are executed only after the user approves the batch the
+	// model requested. The per-generation state (toolApprovalPending,
+	// pendingToolCalls) is mirrored onto ChatGeneration; these are the
+	// entry points QML reaches through it.
+	void approveTools();
+	void denyTools();
+
 	void refreshModels();
 	void requestTitle(ChatSession* session, const QString& userText);
 	void requestIcon(ChatSession* session, const QString& userText);
@@ -83,11 +90,13 @@ class LlmClient : public QObject {
 
 	void sendRound();
 	QJsonArray buildContextMessages(
-		ChatSession* session, int stopBeforeRow) const;
+		ChatSession* session, int stopBeforeRow, int extraReserveTokens) const;
 	void applyToolCallDelta(const QJsonObject& call);
 	void roundFinished();
 	void executeAllCalls();
 	void flushCallResults();
+	void setApprovalPending(bool value);
+	void finishPendingCalls(const QString& resultText);
 	void finishTurn();
 	void fail(const QString& message);
 	void handleLine(const QByteArray& line);
@@ -109,8 +118,11 @@ class LlmClient : public QObject {
 	ToolRegistry* m_tools = nullptr;
 	QNetworkReply* m_reply = nullptr;
 	QByteArray m_buffer;
-	ChatSession* m_active = nullptr;
-	ChatGeneration* m_streaming = nullptr;
+	// QPointer: these objects are owned by the ChatStore tree, which Qt
+	// destroys *before* this client on shutdown (children die in creation
+	// order). The pointers must self-null instead of dangling.
+	QPointer<ChatSession> m_active;
+	QPointer<ChatGeneration> m_streaming;
 	QPointer<ChatSession> m_pendingClear;
 	bool m_busy = false;
 	QString m_streamingChatId;
@@ -133,6 +145,7 @@ class LlmClient : public QObject {
 	qsizetype m_reasoningMark = 0;
 	bool m_roundDone = false;
 	bool m_toolPhase = false;
+	bool m_approvalPending = false;
 	int m_pendingCalls = 0;
 	static constexpr int kMaxToolRounds = 12;
 };