fix: Pressing Escape during component dragging makes the canvas unsel…

…ectable. (#4571)

## Description

1. What is this PR about (link the issue and add a short description)

## Steps for reproduction

1. click button
2. expect xyz

## Code Review

- [ ] hi @kof, I need you to do
  - conceptual review (architecture, feature-correctness)
  - detailed review (read every line)
  - test it on preview

## Before requesting a review

- [ ] made a self-review
- [ ] added inline comments where things may be not obvious (the "why",
not "what")

## Before merging

- [ ] tested locally and on preview environment (preview dev login:
0000)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env` file

packages/design-system/src/components/primitives/dnd/use-drag.ts

@@ -190,6 +190,17 @@ export const useDrag = <DragItemData>(
     };
   }, []);
 
+  useEffect(
+    () => () => {
+      // A component can be disposed of during dragging
+      // (e.g., by pressing Escape or closing the components panel while dragging).
+      if (state.current.status === "dragging") {
+        end(true);
+      }
+    },
+    [end]
+  );
+
   useEffect(() => {
     if (rootElement !== null) {
       rootElement.addEventListener("pointerdown", handlePointerDown);