Add tests for foreground preservation and refactor geometry node asset

- Implement test to ensure foreground preserves source RGB and Ben2 alpha in WorkerTest.
- Remove outdated tests related to background distance and original background depth.
- Update geometry node asset to reflect new naming conventions and structure.
- Introduce validation for depth plane asset, ensuring correct input/output configurations and attribute handling.
- Adjust confidence and edge parameters in geometry node asset to support a wider range of values.

src/snapform/image_mesh.py

@@ -33,7 +33,7 @@ FACE_ATTRIBUTES = {
     "o_edge_stretch": ("FLOAT", "face_edge_stretch"),
     "o_background_face": ("BOOLEAN", "face_background"),
 }
-NODE_GROUP_NAME = "O Refine DA3 Mesh"
+NODE_GROUP_NAME = "O Refine DA3 Surface"
 NODE_ASSET_NAME = "O_SnapForm.blend"
 
 
@@ -60,7 +60,7 @@ def load_image_mesh_data(npz_path):
             missing = [key for key in required if key not in archive.files]
             if missing:
                 raise ValueError(
-                    f"Mesh data is missing: {', '.join(missing)}"
+                    f"Surface data is missing: {', '.join(missing)}"
                 )
             vertices = np.asarray(archive["vertices"], dtype=np.float32)
             faces = np.asarray(archive["faces"], dtype=np.int32)
@@ -81,19 +81,19 @@ def load_image_mesh_data(npz_path):
                 }.items()
             }
     except OSError as error:
-        raise ValueError(f"Unable to read mesh data: {npz_path}") from error
+        raise ValueError(f"Unable to read surface data: {npz_path}") from error
     if vertices.ndim != 2 or vertices.shape[1] != 3:
         raise ValueError(f"Unsupported vertices shape: {vertices.shape}")
     if faces.ndim != 2 or faces.shape[1] != 3:
         raise ValueError(f"Unsupported faces shape: {faces.shape}")
     if uv.shape != (len(vertices), 2):
-        raise ValueError("Mesh UV and vertex counts do not match")
+        raise ValueError("Surface UV and vertex counts do not match")
     if intrinsics.shape != (3, 3):
         raise ValueError(f"Unsupported intrinsics shape: {intrinsics.shape}")
     if len(image_size) != 2 or min(image_size) <= 0:
         raise ValueError(f"Unsupported image size: {image_size}")
     if not reference_depth > 0.0:
-        raise ValueError("Mesh reference depth must be positive")
+        raise ValueError("Surface reference depth must be positive")
     for _name, (_data_type, key) in POINT_ATTRIBUTES.items():
         if len(attributes[key]) != len(vertices):
             raise ValueError(f"Point attribute has the wrong length: {key}")
@@ -394,7 +394,7 @@ def build_image_mesh(
 
 class BuildImageMesh(bpy.types.Operator):
     bl_idname = "snapform.build_image_mesh"
-    bl_label = "Build Image Mesh"
+    bl_label = "Build Image Surface"
     bl_options = {"INTERNAL"}
 
     snapform_source_object_name: bpy.props.StringProperty(
@@ -438,8 +438,8 @@ class BuildImageMesh(bpy.types.Operator):
 
 class ConvertImageToMesh(bpy.types.Operator):
     bl_idname = "snapform.convert_image_to_mesh"
-    bl_label = "Convert to Mesh"
-    bl_description = "Convert an Image Empty into a perspective textured mesh"
+    bl_label = "Convert to Surface"
+    bl_description = "Convert an Image Empty into a perspective textured surface"
     bl_options = {"REGISTER"}
 
     snapform_model: bpy.props.EnumProperty(
@@ -529,7 +529,7 @@ class ConvertImageToMesh(bpy.types.Operator):
 
         source_object = context.object
         if video_total_frames(source_object.data) != 1:
-            self.report({"ERROR"}, "Convert to Mesh currently supports still images")
+            self.report({"ERROR"}, "Convert to Surface currently supports still images")
             return {"CANCELLED"}
         try:
             process_res = scaled_process_resolution(