feat: implement separate geometry handling for panorama mask regions

- Replace Delete Geometry with Separate Geometry in O Image Depth Panorama to manage low and high mask areas independently.
- Adjust depth processing to ensure low mask regions are displaced to Dome Radius while high mask regions follow existing depth rules.
- Update tests to validate new behavior, ensuring outputs align with expected results for both mask states.
- Enhance material handling by introducing emission strength in the shadeless group.

tests/anyimage/operators/test_panorama_conversion.py

@@ -106,7 +106,7 @@ def artifacts(tmp_path, source):
     cleanup_material_color_input(operator.color_path)
 
 
-def test_result_replaces_source_with_zero_rotation_and_shadeless_material(source, artifacts, monkeypatch):
+def test_result_replaces_source_with_zero_rotation_and_emission_material(source, artifacts, monkeypatch):
     result, operator = artifacts
     from anyimage.common.node import load_node_group
     saved = load_node_group("O Image Depth Panorama")
@@ -123,11 +123,14 @@ def test_result_replaces_source_with_zero_rotation_and_shadeless_material(source
     np.testing.assert_allclose(obj.scale, matrix.to_scale(), atol=1e-6)
     np.testing.assert_array_equal(obj.rotation_euler, (0, 0, 0))
     material = obj.data.materials[0]
-    assert not any(n.bl_idname == "ShaderNodeUVMap" for n in material.node_tree.nodes)
-    assert any(n.type == "GROUP" and n.node_tree.name == "O Shadeless" for n in material.node_tree.nodes)
-    assert [n.node_tree.name for n in material.node_tree.nodes if n.type == "GROUP"] == ["O Shadeless"]
-    texture = next(n for n in material.node_tree.nodes if n.type == "TEX_IMAGE")
+    nodes = material.node_tree.nodes
+    assert not any(n.bl_idname == "ShaderNodeUVMap" or n.type == "GROUP" for n in nodes)
+    texture = next(n for n in nodes if n.type == "TEX_IMAGE")
+    emission = next(n for n in nodes if n.type == "EMISSION")
+    output = next(n for n in nodes if n.type == "OUTPUT_MATERIAL")
     assert texture.extension == "REPEAT"
+    assert emission.inputs["Color"].links[0].from_socket == texture.outputs["Color"]
+    assert output.inputs["Surface"].links[0].from_socket == emission.outputs["Emission"]
     assert bpy.context.view_layer.objects.active == obj
     assert all(image.packed_file for image in bpy.data.images if image.name.endswith(("_color.png", "_depth.exr")))
     graph = bpy.context.evaluated_depsgraph_get()