fix(vscode): include kilo-sandbox-mutation-worker.js in extension bundle (#11926)

* fix(vscode): include kilo-sandbox-mutation-worker.js in extension bundle

The release build script (packages/kilo-vscode/script/build.ts) was
missing the copyKiloSandboxWorker call, causing the sandbox mutation
worker file to be absent from .vsix packages. All sandbox-enclosed file
operations (write, copy, rename, chmod, etc.) would fail with a
"Module not found" error because the kilo binary could not spawn the
required worker process.

Closes #11925

* chore(vscode): fix import formatting

---------

Co-authored-by: marius-kilocode <marius@kilocode.ai>

.changeset/fix-missing-sandbox-worker.md

@@ -0,0 +1,5 @@
+---
+"kilo-code": patch
+---
+
+Fix missing kilo-sandbox-mutation-worker.js in VS Code extension bundle, which caused sandboxed file operations to fail with "Module not found".

packages/kilo-vscode/script/build.ts

@@ -2,7 +2,11 @@
 import { $ } from "bun"
 import { join } from "node:path"
 import { existsSync, mkdirSync, rmSync, chmodSync } from "node:fs"
-import { copySandboxResources, copyTreeSitterResources } from "../src/services/cli-backend/cli-resources"
+import {
+  copyKiloSandboxWorker,
+  copySandboxResources,
+  copyTreeSitterResources,
+} from "../src/services/cli-backend/cli-resources"
 import { ensureFfmpegForTarget } from "./ffmpeg-helper"
 
 const packageJsonPath = join(import.meta.dir, "..", "package.json")
@@ -78,6 +82,7 @@ for (const config of targets) {
   await $`cp ${sourceBinary} ${targetBinary}`
   await copyTreeSitterResources(sourceBinary, targetBinary)
   await copySandboxResources(sourceBinary, targetBinary)
+  await copyKiloSandboxWorker(sourceBinary, targetBinary)
 
   if (config.binary !== "kilo.exe") {
     chmodSync(targetBinary, 0o755)