chore: restructure llm plugin to be more coherent & fix various bugs in llm ui

Plugins/ZShell/Llm/shelltool.hpp

@@ -11,23 +11,21 @@ class QTimer;
 
 namespace ZShell::llm {
 
-class LlmClient;
-
 class ShellTool : public LlmTool {
 	Q_OBJECT
 
 	public:
-	explicit ShellTool(LlmClient* client, QObject* parent = nullptr);
+	explicit ShellTool(ToolRegistry* registry, QObject* parent = nullptr);
 	~ShellTool() override;
 
 	QString name() const override;
 	QString description() const override;
 	QJsonObject parameters() const override;
+	bool available(const ToolContext& context) const override;
 	void execute(
-		const QString& toolCallId,
+		const ToolContext& context,
 		const QJsonObject& args,
-		int outputBudgetChars,
-		std::function<void(const QJsonObject& result)> done) override;
+		ToolDone done) override;
 	void cancel() override;
 
 	static constexpr int DefaultTimeoutSeconds = 60;
@@ -39,7 +37,7 @@ class ShellTool : public LlmTool {
 		QPointer<QTimer> timer;
 		int timeoutSeconds = DefaultTimeoutSeconds;
 		int outputBudgetChars = 0;
-		std::function<void(const QJsonObject&)> done;
+		ToolDone done;
 		QString startError;
 		bool timedOut = false;
 		bool cancelled = false;
@@ -50,7 +48,6 @@ class ShellTool : public LlmTool {
 
 	void finishJob(Job* job);
 
-	QPointer<LlmClient> m_client;
 	QList<Job*> m_jobs;
 };