feat(gui): Implement live shader editor panel

tests/test_shader_live_editor.py

@@ -0,0 +1,14 @@
+import pytest
+from unittest.mock import patch, MagicMock
+
+def test_shader_live_editor_renders():
+ from src.gui_2 import App
+ app = App()
+ app.show_windows["Shader Editor"] = True
+ 
+ with patch("src.gui_2.imgui") as mock_imgui:
+  mock_imgui.begin.return_value = (True, True)
+  mock_imgui.slider_float.return_value = (False, 1.0)
+  app._render_shader_live_editor()
+  assert mock_imgui.begin.called
+  assert mock_imgui.end.called