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

sources/widgets/EditorChatButton.hpp

@@ -0,0 +1,38 @@
+// 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 <QPushButton>
+#include <QTimer>
+#include <QWidget>
+
+namespace QodeAssist {
+
+class EditorChatButton : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit EditorChatButton(QWidget *parent = nullptr);
+    ~EditorChatButton() override;
+
+signals:
+    void clicked();
+
+protected:
+    void paintEvent(QPaintEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
+    void mouseReleaseEvent(QMouseEvent *event) override;
+    void enterEvent(QEnterEvent *event) override;
+    void leaveEvent(QEvent *event) override;
+
+private:
+    QPixmap m_logoPixmap;
+    QColor m_textColor;
+    QColor m_backgroundColor;
+    bool m_isPressed = false;
+    bool m_isHovered = false;
+};
+
+} // namespace QodeAssist