chore: address review feedback (const, unused import)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: YousefED

packages/core/src/api/blockManipulation/commands/nestBlock/nestBlock.test.ts

@@ -2,7 +2,7 @@ import { describe, expect, it } from "vitest";
 
 import { BlockNoteEditor } from "../../../../editor/BlockNoteEditor.js";
 import { PartialBlock } from "../../../../blocks/defaultBlocks.js";
-import { afterAll, beforeAll, beforeEach } from "vitest";
+import { afterAll, beforeAll } from "vitest";
 
 /**
  * Custom test setup with a document designed to reproduce nesting/unnesting bugs.

packages/core/src/api/blockManipulation/commands/nestBlock/nestBlock.ts

@@ -95,7 +95,7 @@ function liftToOuterList(
   groupType: NodeType, // change 3
   range: NodeRange,
 ) {
-  let end = range.end;
+  const end = range.end;
   const endOfList = range.$to.end(range.depth);
 
   if (end < endOfList) {