test(palette): add live_gui integration tests via toggle custom_callback

src/gui_2.py

@@ -170,6 +170,8 @@ class App:
   self.controller._predefined_callbacks['set_ui_screenshot_paths'] = lambda p: setattr(self, 'ui_screenshot_paths', p)
   self.controller._predefined_callbacks['set_context_files_for_test'] = lambda files: setattr(self, 'context_files', [models.FileItem(path=f) for f in files])
   self.controller._predefined_callbacks['set_screenshots_for_test'] = lambda ss: setattr(self, 'screenshots', ss)
+  self.controller._predefined_callbacks['_toggle_command_palette'] = self._toggle_command_palette
+  self.controller._gettable_fields['show_command_palette'] = 'show_command_palette'
   
   def _save_context_preset_force(name: str):
    if not name: return
@@ -727,6 +729,16 @@ class App:
  def ui_screenshot_paths(self, paths: list[str]) -> None:
   self.screenshots = paths
 
+ def _toggle_command_palette(self) -> None:
+  """Toggle the Command Palette visibility. Used as a custom_callback for tests
+  since the keyboard shortcut (Ctrl+Shift+P) cannot be simulated via the hook API."""
+  self.show_command_palette = not self.show_command_palette
+  if self.show_command_palette:
+   if hasattr(self, '_command_palette_query'):
+    self._command_palette_query = ""
+   if hasattr(self, '_command_palette_selected'):
+    self._command_palette_selected = 0
+
  def _test_callback_func_write_to_file(self, data: str) -> None:
   """A dummy function that a custom_callback would execute for testing."""
   # Ensure the directory exists if running from a different cwd