@startuml
class MainWindow {
  +menu_bar: QMenuBar
  +project_list: ProjectListWidget
  +workspace: WorkspaceManager
  +status_bar: QStatusBar
}

class ProjectListWidget {
  +project_tree: QTreeWidget
  +context_menu: QMenu
  +discover_projects()
  +handle_context_menu()
}

class WorkspaceManager {
  +panes: List[PaneWidget]
  +splitter: QSplitter
  +split_horizontal()
  +split_vertical()
  +close_pane()
}

class PaneWidget {
  +tab_bar: QTabBar
  +tabs: List[QTabWidget]
  +add_tab()
  +close_tab()
}

class TerminalWidget {
  +pty: pty.process
  +screen: pyte.Screen
  +terminal: QPlainTextEdit
  +start_shell()
  +handle_input()
}

MainWindow --> ProjectListWidget
MainWindow --> WorkspaceManager
WorkspaceManager --> PaneWidget
PaneWidget --> TerminalWidget
ProjectListWidget --> dialogs
@enduml