fix: hide windows restart console flashes (#44842) (thanks @MoerAI)

The restart helper and taskkill spawn calls were missing windowsHide: true,
causing visible command prompt windows to flash on screen during gateway
restart and process cleanup on Windows.

CHANGELOG.md

@@ -18,6 +18,7 @@ Docs: https://docs.openclaw.ai
 - Windows/gateway install: bound `schtasks` calls and fall back to the Startup-folder login item when task creation hangs, so native `openclaw gateway install` fails fast instead of wedging forever on broken Scheduled Task setups.
 - Windows/gateway auth: stop attaching device identity on local loopback shared-token and password gateway calls, so native Windows agent replies no longer log stale `device signature expired` fallback noise before succeeding.
 - Telegram/media downloads: thread the same direct or proxy transport policy into SSRF-guarded file fetches so inbound attachments keep working when Telegram falls back between env-proxy and direct networking. (#44639) Thanks @obviyus.
+- Windows/restart UX: hide detached restart-helper and `taskkill` console windows so gateway restart and process cleanup no longer flash visible command prompts. (#44842) Thanks @MoerAI.
 - Agents/compaction: compare post-compaction token sanity checks against full-session pre-compaction totals and skip the check when token estimation fails, so sessions with large bootstrap context keep real token counts instead of falling back to unknown. (#28347) thanks @efe-arv.
 - Discord/gateway startup: treat plain-text and transient `/gateway/bot` metadata fetch failures as transient startup errors so Discord gateway boot no longer crashes on unhandled rejections. (#44397) Thanks @jalehman.
 - Gateway/session reset: preserve `lastAccountId` and `lastThreadId` across gateway session resets so replies keep routing back to the same account and thread after `/reset`. (#44773) Thanks @Lanfei.

src/cli/update-cli/restart-helper.test.ts

@@ -287,6 +287,7 @@ describe("restart-helper", () => {
       expect(spawn).toHaveBeenCalledWith("/bin/sh", [scriptPath], {
         detached: true,
         stdio: "ignore",
+        windowsHide: true,
       });
       expect(mockChild.unref).toHaveBeenCalled();
     });
@@ -302,6 +303,7 @@ describe("restart-helper", () => {
       expect(spawn).toHaveBeenCalledWith("cmd.exe", ["/d", "/s", "/c", scriptPath], {
         detached: true,
         stdio: "ignore",
+        windowsHide: true,
       });
       expect(mockChild.unref).toHaveBeenCalled();
     });
@@ -317,6 +319,7 @@ describe("restart-helper", () => {
       expect(spawn).toHaveBeenCalledWith("cmd.exe", ["/d", "/s", "/c", `"${scriptPath}"`], {
         detached: true,
         stdio: "ignore",
+        windowsHide: true,
       });
     });
   });

src/cli/update-cli/restart-helper.ts

@@ -169,6 +169,7 @@ export async function runRestartScript(scriptPath: string): Promise<void> {
   const child = spawn(file, args, {
     detached: true,
     stdio: "ignore",
+    windowsHide: true,
   });
   child.unref();
 }

src/process/kill-tree.ts

@@ -83,6 +83,7 @@ function runTaskkill(args: string[]): void {
     spawn("taskkill", args, {
       stdio: "ignore",
       detached: true,
+      windowsHide: true,
     });
   } catch {
     // Ignore taskkill spawn failures