Polish application theme and menus

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: baremetalgo

interface/core/window_core.py

@@ -152,6 +152,26 @@ def _install_ui_event_logging(self, root: QWidget) -> None:
                     lambda item=widget: self._log_ui_event("edited", item, item.text())
                 )
 
+    def edit_focused_widget(self, method_name: str) -> None:
+        """Run a standard edit operation on the currently focused editor.
+
+        Args:
+            method_name: Qt editor method to invoke, such as ``copy`` or
+                ``selectAll``.
+        """
+        widget = QApplication.focusWidget()
+        method = getattr(widget, method_name, None) if widget is not None else None
+        if callable(method):
+            method()
+
+    def show_about_dialog(self) -> None:
+        """Display the application identity and version."""
+        QMessageBox.information(
+            self,
+            f"About {APP_NAME}",
+            f"{APP_NAME} {APP_VERSION}\n\nA desktop environment for building, training, and using LLMs.",
+        )
+
     def _log_ui_event(self, action: str, widget: QWidget, value: Any) -> None:
         """Log a UI action or parameter value.
 

interface/styles.qss

@@ -116,6 +116,29 @@ QCheckBox {
     spacing: 8px;
 }
 
+QCheckBox::indicator {
+    width: 14px;
+    height: 14px;
+    background: #111111;
+    border: 1px solid #6a6a6a;
+    border-radius: 3px;
+}
+
+QCheckBox::indicator:hover {
+    border-color: #f5b041;
+    background: #1d1d1d;
+}
+
+QCheckBox::indicator:checked {
+    background: #c94343;
+    border-color: #f07171;
+}
+
+QCheckBox::indicator:checked:hover {
+    background: #e05a5a;
+    border-color: #ff9292;
+}
+
 QPushButton {
     background: #242424;
     color: #eeeeee;
@@ -185,7 +208,7 @@ QTextEdit {
     font-size: 12px;
 }
 
-QTableWidget {
+QTableWidget, QTreeWidget {
     background: #111111;
     alternate-background-color: #1b1b1b;
     color: #eeeeee;
@@ -196,6 +219,16 @@ QTableWidget {
     selection-color: #ffffff;
 }
 
+QTableWidget::item, QTreeWidget::item {
+    background: #111111;
+    color: #eeeeee;
+}
+
+QTableWidget::item:selected, QTreeWidget::item:selected {
+    background: #3a2d19;
+    color: #ffffff;
+}
+
 QHeaderView::section {
     background: #202020;
     color: #f5b041;
@@ -206,6 +239,88 @@ QHeaderView::section {
     font-weight: 800;
 }
 
+QScrollBar:vertical {
+    background: #171717;
+    width: 8px;
+    margin: 2px 0;
+}
+
+QScrollBar::handle:vertical {
+    background: #c98216;
+    min-height: 24px;
+    border-radius: 4px;
+}
+
+QScrollBar::handle:vertical:hover {
+    background: #f5b041;
+}
+
+QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {
+    height: 0;
+}
+
+QScrollBar:horizontal {
+    background: #171717;
+    height: 8px;
+    margin: 0 2px;
+}
+
+QScrollBar::handle:horizontal {
+    background: #c98216;
+    min-width: 24px;
+    border-radius: 4px;
+}
+
+QScrollBar::handle:horizontal:hover {
+    background: #f5b041;
+}
+
+QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal {
+    width: 0;
+}
+
+QMenuBar {
+    background: #1f1f1f;
+    color: #eeeeee;
+    border: 1px solid #3d3d3d;
+    border-radius: 7px;
+    padding: 2px;
+}
+
+QMenuBar::item {
+    background: transparent;
+    padding: 6px 10px;
+    border-radius: 5px;
+}
+
+QMenuBar::item:selected {
+    background: #f5b041;
+    color: #151515;
+}
+
+QMenu {
+    background: #242424;
+    color: #eeeeee;
+    border: 1px solid #555555;
+    padding: 4px;
+}
+
+QMenu::item {
+    padding: 6px 28px 6px 12px;
+    border-radius: 4px;
+}
+
+QMenu::item:selected {
+    background: #f5b041;
+    color: #151515;
+}
+
+QMenu::separator {
+    height: 1px;
+    background: #3d3d3d;
+    margin: 4px 8px;
+}
+
 QTextBrowser {
     background: #111111;
     color: #eeeeee;

interface/widgets/app_shell.py

@@ -8,6 +8,7 @@
     QHBoxLayout,
     QLabel,
     QLineEdit,
+    QMenuBar,
     QPushButton,
     QSizePolicy,
     QStackedWidget,
@@ -53,16 +54,33 @@ def build_top_bar(window, app_name: str) -> QWidget:
     window.search_box.setPlaceholderText("Project name...")
     window.search_box.setMaximumWidth(260)
     window._tip(window.search_box, f"Project name used when saving or reopening a {app_name} project.")
-    for name, text, slot in (
-        ("new_project_button", "New Project", window.new_project),
-        ("save_project_button", "Save Project", window.save_project),
-        ("open_project_button", "Open Project", window.open_project),
+    window.menu_bar = QMenuBar()
+    window.menu_bar.setObjectName("AppMenuBar")
+    window.file_menu = window.menu_bar.addMenu("File")
+    window.new_project_action = window.file_menu.addAction("New Project", window.new_project)
+    window.new_project_action.setShortcut("Ctrl+N")
+    window.save_project_action = window.file_menu.addAction("Save Project", window.save_project)
+    window.save_project_action.setShortcut("Ctrl+S")
+    window.open_project_action = window.file_menu.addAction("Open Project", window.open_project)
+    window.open_project_action.setShortcut("Ctrl+O")
+
+    window.edit_menu = window.menu_bar.addMenu("Edit")
+    for text, method, shortcut in (
+        ("Undo", "undo", "Ctrl+Z"),
+        ("Redo", "redo", "Ctrl+Shift+Z"),
+        ("Cut", "cut", "Ctrl+X"),
+        ("Copy", "copy", "Ctrl+C"),
+        ("Paste", "paste", "Ctrl+V"),
+        ("Select All", "selectAll", "Ctrl+A"),
     ):
-        button = QPushButton(text)
-        button.setMaximumWidth(130)
-        button.clicked.connect(slot)
-        window._tip(button, f"{text} in the current project.")
-        setattr(window, name, button)
+        action = window.edit_menu.addAction(text)
+        action.setShortcut(shortcut)
+        action.triggered.connect(
+            lambda _checked=False, method=method: window.edit_focused_widget(method)
+        )
+
+    window.about_menu = window.menu_bar.addMenu("About")
+    window.about_menu.addAction(f"About {app_name}", window.show_about_dialog)
 
     for name, text in (
         ("dataset_status", "Dataset: not prepared"),
@@ -82,8 +100,7 @@ def build_top_bar(window, app_name: str) -> QWidget:
     layout.addWidget(logo)
     layout.addSpacing(12)
     layout.addWidget(window.search_box)
-    for name in ("new_project_button", "save_project_button", "open_project_button"):
-        layout.addWidget(getattr(window, name))
+    layout.addWidget(window.menu_bar)
     layout.addSpacing(10)
     for name in ("dataset_status", "train_status", "export_status", "chat_status"):
         layout.addWidget(getattr(window, name))