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,
                 };

src/ui/overlay.rs

@@ -2193,7 +2193,7 @@ struct DynInputCanvas {
     boxes: Vec<DynBox>,
     /// The active command's current prompt, drawn just above the boxes.
     prompt: String,
-    /// Informational tracking/reference mode currently engaged.
+    /// Active tracking-reference label.
     tracking_hint: Option<String>,
 }
 
@@ -2543,9 +2543,7 @@ impl DynInputCanvas {
             };
             Self::draw_box(frame, b, center, bounds, theme);
         }
-        // Guided dynamic-input layouts place their editable boxes on the
-        // construction geometry, so keep the tracking-reference pill near
-        // the crosshair instead.
+        // Keep the tracking hint near the crosshair in guided layouts.
         if let Some(text) = self.tracking_hint.as_deref() {
             let hw = (text.len() as f32 * DYN_CHAR_W) + DYN_PAD * 2.0;
 
@@ -2636,12 +2634,11 @@ impl DynInputCanvas {
             });
             x += w + DYN_GAP;
         }
-        // Informational tracking reference, using the same pill style as
-        // the command prompt. Keep it below the editable value row.
+        // Place the tracking hint below the value row.
         if self.tracking_hint.is_some() {
             let mut hy = by + DYN_BOX_H + 3.0;
 
-            // If there is no room below, place it above the prompt/value block.
+            // Move above when bottom space is insufficient.
             if hy + DYN_BOX_H > bounds.height {
                 hy = (py - DYN_BOX_H - 3.0).max(0.0);
             }