Enhance image editing tests and functionality

- Added parameterized tests for image edit replacement to ensure alpha mode preservation.
- Refactored existing tests to utilize new image editing methods and improve clarity.
- Introduced new tests for image target functionality, ensuring proper handling of shared textures and context.
- Updated various tests to validate alpha mode handling across different scenarios.
- Improved undo/redo functionality in image operators to maintain state consistency.
- Added support for texture node actions, enhancing integration with Blender's node system.
- Ensured that image properties are preserved during operations and that invalid contexts are handled gracefully.

tests/anyimage/test_addon_registration.py

@@ -290,8 +290,10 @@ class AddonRegistrationTest(BlenderTestCase):
         )
         existing_context_draw = object()
         existing_outliner_draw = object()
+        existing_node_draw = object()
         self.context_menu_draws.append(existing_context_draw)
         self.outliner_menu_draws.append(existing_outliner_draw)
+        self.node_menu_draws.append(existing_node_draw)
 
         self.assertFalse(any("debug" in cls.bl_idname.lower() for cls in self.anyimage.CLASSES if hasattr(cls, "bl_idname")))
         settings = self.anyimage.properties.AnyImageSettings.__annotations__
@@ -346,6 +348,9 @@ class AddonRegistrationTest(BlenderTestCase):
         )
         self.assertFalse(hasattr(self.fake_bpy.types.Image, "anyimage_upscale_source"))
 
+        self.assertEqual(self.node_menu_draws, [self.anyimage.draw_texture_node_context_menu, existing_node_draw])
+        self.assertIn(self.anyimage.AnyImageTextureNodeMenu, self.registered)
+
         unregister_order = []
         original_unregister = self.fake_bpy.utils.unregister_class
         def unregister(cls):
@@ -362,4 +367,9 @@ class AddonRegistrationTest(BlenderTestCase):
         self.assertEqual(self.status_bar_draws, [])
         self.assertEqual(self.context_menu_draws, [existing_context_draw])
         self.assertEqual(self.outliner_menu_draws, [existing_outliner_draw])
+        self.assertEqual(self.node_menu_draws, [existing_node_draw])
+        self.anyimage.register()
+        self.assertEqual(self.node_menu_draws, [self.anyimage.draw_texture_node_context_menu, existing_node_draw])
+        self.anyimage.unregister()
+        self.assertEqual(self.node_menu_draws, [existing_node_draw])
         self.assertFalse(hasattr(self.fake_bpy.types.Image, "anyimage_upscale_source"))