fix dragging cursor off-screen

src/backend/input.rs

@@ -313,6 +313,7 @@ where
             pointer = &mut app.input_state.pointers[idx];
             pointer.interaction.hovered_id = None;
         }
+        if !pointer.now.click && pointer.before.click {
             if let Some(clicked_id) = pointer.interaction.clicked_id.take() {
                 if let Some(clicked) = overlays.mut_by_id(clicked_id) {
                     let hit = PointerHit {
@@ -324,6 +325,7 @@ where
                     clicked.backend.on_pointer(app, &hit, false);
                 }
             }
+        }
         return (0.0, None); // no hit
     };