Ensure Electron sidecar launch and Windows taskkill calls hide console windows, and pass the same hidden-window spawn option through desktop CLI and scheduled-task subprocess launches.
Tested: cd desktop && bun test ./electron/services/sidecarManager.test.ts
Tested: bun test src/server/__tests__/conversation-service.test.ts src/server/__tests__/cron-scheduler-launcher.test.ts
Tested: bun run check:native
Tested: bun run check:server
Not-tested: Windows GUI quit smoke
Confidence: medium
Scope-risk: narrow