fix(otrack): clear and localize tracking hint

src/app/mod.rs

@@ -430,8 +430,7 @@ pub(super) struct OpenCADStudio {
     /// cursor is on a tracking ray. Lets a typed distance place a point along
     /// the ray from the tracking point (issue #69). `None` when not aligned.
     otrack_active: Option<(glam::DVec3, glam::DVec3)>,
-    /// Kind of the currently active tracking reference, kept separately from
-    /// `otrack_active` so typed-distance behavior remains unchanged.
+    /// Active OTRACK ray kind, separate from typed-distance geometry.
     otrack_kind: Option<crate::snap::TrackingKind>,
     /// Whether Tangent snap was enabled before a tangent-pick command started.
     pre_cmd_tangent: Option<bool>,

src/app/update/mod.rs

@@ -3137,6 +3137,8 @@ impl OpenCADStudio {
                 self.snapper.otrack_enabled ^= true;
                 if !self.snapper.otrack_enabled {
                     self.snapper.clear_tracking();
+                    self.otrack_active = None;
+                    self.otrack_kind = None;
                 }
                 Task::none()
             }

src/app/view/mod.rs

@@ -812,10 +812,10 @@ impl OpenCADStudio {
 
                 let tracking_hint = match self.otrack_kind {
                     Some(crate::snap::TrackingKind::Perpendicular) => {
-                        Some("Perpendicular".to_string())
+                        Some(crate::tr!("common", "perpendicular"))
                     }
                     Some(crate::snap::TrackingKind::Extension) => {
-                        Some("Extension".to_string())
+                        Some(crate::tr!("common", "extension"))
                     }
                     _ => None,
                 };