fix review feedback for OTRACK projection and OtrackHit API

Co-authored-by: dichhead <330471626+dichhead@users.noreply.github.com>

src/app/view/mod.rs

@@ -780,7 +780,11 @@ bg={bg_ms:.1}ms n={view_count}"
                         .chain(self.otrack_cross)
                         .filter_map(|(base, _dir)| {
                             let b = ost_project(base, view_rot, eye, ob);
-                            (b.x.is_finite() && a.x.is_finite()).then_some((b, a))
+                            (b.x.is_finite()
+                                && b.y.is_finite()
+                                && a.x.is_finite()
+                                && a.y.is_finite())
+                                .then_some((b, a))
                         })
                         .collect()
                 }

src/snap.rs

@@ -170,6 +170,7 @@ pub(crate) fn wire_source(wire: &WireModel) -> Option<DimensionAssociationSource
 /// Object-snap-tracking alignment: the cursor projected onto a ray from an
 /// acquired tracking point.
 #[derive(Debug, Clone, Copy)]
+#[non_exhaustive]
 pub struct OtrackHit {
     /// Cursor projected onto the tracking ray.
     pub aligned: DVec3,