Equal follow-ups: one glyph per object, unshown Multiple bars, typed object picks

- An object that carries several Equal relations shows a single "="
  badge, as the reference does, instead of one stacked badge per relation.
- A pick made in the Multiple flow leaves its new constraint bar unshown
  until the object is selected or bars are shown, matching the reference;
  the single flow still shows the bar at once.
- A typed coordinate at the Fix `Select object:` prompt and at the
  Horizontal/Vertical `Select an object or [2Points]` prompt picks the
  object under that point, like a click, instead of being read as a point.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/modules/parametric/fixed.rs

@@ -104,6 +104,10 @@ impl CadCommand for FixConstraintCommand {
         true
     }
 
+    fn typed_point_picks_entity(&self) -> bool {
+        matches!(self.step, Step::Object)
+    }
+
     fn entity_pick_highlights_hover(&self) -> bool {
         true
     }

src/modules/parametric/horizontal.rs

@@ -269,6 +269,10 @@ impl CadCommand for HorizontalConstraintCommand {
         true
     }
 
+    fn typed_point_picks_entity(&self) -> bool {
+        matches!(self.step, Step::ObjectOrTwoPoints)
+    }
+
     fn entity_pick_highlights_hover(&self) -> bool {
         true
     }