feat(gui): Implement custom title bar and window controls

tests/test_gui_window_controls.py

@@ -0,0 +1,31 @@
+import pytest
+from unittest.mock import patch, MagicMock
+from imgui_bundle import imgui
+
+def test_gui_window_controls_minimize_maximize_close():
+ # We will test the logic of the title bar controls that we are about to implement.
+ from src.gui_2 import App
+ app = App()
+ 
+ with patch("src.gui_2.win32gui") as mock_win32gui, \
+      patch("src.gui_2.win32con") as mock_win32con, \
+      patch("src.gui_2.imgui") as mock_imgui:
+  
+  # Setup mock for HWND
+  mock_viewport = MagicMock()
+  mock_viewport.platform_handle = 12345
+  mock_imgui.get_main_viewport.return_value = mock_viewport
+  
+  # Setup mock for buttons to simulate clicks
+  # Let's say _render_custom_title_bar uses imgui.button
+  # We will test the close button logic
+  # Since it's UI code, we just simulate the conditions
+  mock_imgui.button.return_value = True # Simulate all buttons being clicked
+  
+  # Call the method (to be implemented)
+  app._render_custom_title_bar()
+  
+  # Verify that win32gui calls are made for minimize, maximize, close
+  # Since all buttons returned True, all actions should be triggered in this dummy test
+  assert mock_win32gui.ShowWindow.called
+  assert mock_win32gui.PostMessage.called