Capture pointer input during grip edits

src/app/update/viewport.rs

@@ -2784,6 +2784,18 @@ impl OpenCADStudio {
             height: vh,
         };
 
+        // An engaged grip owns the next left press (click-move-click placement
+        // or the release of a press-drag). Do not let the same press arm the
+        // normal box/lasso state; the release path below will commit the grip.
+        if self.tabs[i].active_grip.is_some() {
+            self.tabs[i]
+                .scene
+                .selection
+                .borrow_mut()
+                .clear_left_selection_gesture();
+            return Task::none();
+        }
+
         if self.tabs[i].active_cmd.is_none()
             && self.tabs[i].active_grip.is_none()
             && !self.tabs[i].selected_grips.is_empty()
@@ -2879,6 +2891,11 @@ impl OpenCADStudio {
                     ));
                     self.grip_hover = None;
                     self.grip_popup = None;
+                    self.tabs[i]
+                        .scene
+                        .selection
+                        .borrow_mut()
+                        .clear_left_selection_gesture();
 
                     // A grip edit is not a CAD command, so explicitly seed the shared
                     // dynamic-input fields for the newly engaged grip.
@@ -2956,10 +2973,7 @@ impl OpenCADStudio {
             // click doesn't read as an in-progress drag on later moves.
             {
                 let mut sel = self.tabs[i].scene.selection.borrow_mut();
-                sel.left_down = false;
-                sel.left_press_pos = None;
-                sel.left_press_time = None;
-                sel.left_dragging = false;
+                sel.clear_left_selection_gesture();
             }
             let moved = grip.last_world != grip.origin_world;
             if is_click && !moved {