fix: Alt+drag movement block

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

packages/element/src/binding.ts

@@ -715,21 +715,23 @@ const getBindingStrategyForDraggingBindingElementEndpoints_simple = (
   // Handle special alt key case to inside bind no matter what
   if (opts?.altKey) {
     return {
-      start:
-        startDragged && hit
+      start: startDragged
+        ? hit
           ? {
               mode: "inside",
               element: hit,
               focusPoint: globalPoint,
             }
+          : { mode: null }
         : start,
-      end:
-        endDragged && hit
+      end: endDragged
+        ? hit
           ? {
               mode: "inside",
               element: hit,
               focusPoint: globalPoint,
             }
+          : { mode: null }
         : end,
     };
   }