Use Spine attr_names for hover attributes

Author: francois-drielsma

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Use `attr_names()` to populate valid SPINE hover attributes, including
+    derived quantities such as `RecoParticle.ke`, while excluding `points*`
+    location fields from the attribute dropdown.
 
 ## [0.4.2] - 2026-05-11
 ### Fixed

src/spinal_tap/callbacks.py

@@ -1,7 +1,5 @@
 """Defines the callbacks of the Spinal Tap application."""
 
-from dataclasses import asdict
-
 import numpy as np
 import spine.data.out
 from dash import ctx, dcc, html, no_update
@@ -662,12 +660,16 @@ def update_attr_list(mode, obj):
         if mode != "truth":
             cls_name = f"Reco{obj[:-1].capitalize()}"
             cls_obj = getattr(spine.data.out, cls_name)()
-            attrs.update(set(asdict(cls_obj).keys()))
+            attrs.update(
+                attr for attr in cls_obj.attr_names() if not attr.startswith("points")
+            )
 
         if mode != "reco":
             cls_name = f"Truth{obj[:-1].capitalize()}"
             cls_obj = getattr(spine.data.out, cls_name)()
-            attrs.update(set(asdict(cls_obj).keys()))
+            attrs.update(
+                attr for attr in cls_obj.attr_names() if not attr.startswith("points")
+            )
 
         return np.sort(list(attrs))