refactor: Restructure project into sources/tests layout and dissolve PluginLLMCore

sources/widgets/DiffStatistics.hpp

@@ -0,0 +1,56 @@
+// Copyright (C) 2025-2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Additional attribution terms under GPLv3 §7(b) apply — see LICENSE
+
+#pragma once
+
+#include <QString>
+#include <QCoreApplication>
+
+#include <utils/differ.h>
+
+namespace QodeAssist {
+
+class DiffStatistics
+{
+    Q_DECLARE_TR_FUNCTIONS(DiffStatistics)
+
+public:
+    DiffStatistics() = default;
+
+    void calculate(const QList<Utils::Diff> &diffList)
+    {
+        m_linesAdded = 0;
+        m_linesRemoved = 0;
+
+        for (const auto &diff : diffList) {
+            if (diff.command == Utils::Diff::Insert) {
+                m_linesAdded += diff.text.count('\n') + (diff.text.isEmpty() ? 0 : 1);
+            } else if (diff.command == Utils::Diff::Delete) {
+                m_linesRemoved += diff.text.count('\n') + (diff.text.isEmpty() ? 0 : 1);
+            }
+        }
+    }
+
+    int linesAdded() const { return m_linesAdded; }
+    int linesRemoved() const { return m_linesRemoved; }
+
+    QString formatSummary() const
+    {
+        if (m_linesAdded > 0 && m_linesRemoved > 0) {
+            return tr("+%1 lines, -%2 lines").arg(m_linesAdded).arg(m_linesRemoved);
+        } else if (m_linesAdded > 0) {
+            return tr("+%1 lines").arg(m_linesAdded);
+        } else if (m_linesRemoved > 0) {
+            return tr("-%1 lines").arg(m_linesRemoved);
+        }
+        return tr("No changes");
+    }
+
+private:
+    int m_linesAdded{0};
+    int m_linesRemoved{0};
+};
+
+} // namespace QodeAssist
+