fix(osnap): a POINT snaps as a Node only

A point carried a key vertex, so Endpoint (which outranks Node) claimed
it, and an absolute-size glyph's strokes were indexed for Nearest and
Intersection. Points now offer only their Node, in the indexed and the
unindexed snap paths alike.

Fixes #1570

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/entities/point.rs

@@ -51,7 +51,7 @@ fn point_render(pt: &Point, pdmode: i16, s: f64) -> RenderEntity {
             object: RenderObject::Lines(vec![]),
             snap_pts: vec![(snap, SnapHint::Node)],
             tangent_geoms: vec![],
-            key_vertices: vec![[wx, wy, wz]],
+            key_vertices: vec![],
             fill_tris: vec![],
         };
     }
@@ -63,7 +63,8 @@ fn point_render(pt: &Point, pdmode: i16, s: f64) -> RenderEntity {
         key_vertices: if pt.thickness.abs() > 1.0e-10 {
             vec![[wx, wy, wz], [top.x, top.y, top.z]]
         } else {
-            vec![[wx, wy, wz]]
+            // Snaps as a Node only, never as an endpoint.
+            vec![]
         },
         fill_tris: vec![],
     }