feat: add support acp in common chat (#369)

sources/session/AgentPlan.hpp

@@ -0,0 +1,49 @@
+// Copyright (C) 2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Additional attribution terms under GPLv3 §7(b) apply — see LICENSE
+
+#pragma once
+
+#include <QDebug>
+#include <QJsonObject>
+#include <QList>
+#include <QString>
+
+#include <optional>
+
+namespace QodeAssist::Session {
+
+struct PlanEntry
+{
+    QString content;
+    QString priority;
+    QString status;
+
+    bool operator==(const PlanEntry &other) const = default;
+
+    friend QDebug operator<<(QDebug debug, const PlanEntry &entry)
+    {
+        return debug.nospace() << "PlanEntry(" << entry.content << ", " << entry.priority << ", "
+                               << entry.status << ")";
+    }
+};
+
+struct PlanBlock
+{
+    QList<PlanEntry> entries;
+
+    bool operator==(const PlanBlock &other) const = default;
+
+    friend QDebug operator<<(QDebug debug, const PlanBlock &block)
+    {
+        return debug.nospace() << "Plan(" << block.entries << ")";
+    }
+};
+
+QJsonObject planBlockToJson(const PlanBlock &block);
+PlanBlock planBlockFromJson(const QJsonObject &json);
+
+QString encodePlanBlock(const PlanBlock &block);
+std::optional<PlanBlock> decodePlanBlock(const QString &text);
+
+} // namespace QodeAssist::Session