Move virtual camera shutdown to subscription in service.

[michelinewu]

Avoid unnecessary VirtualWebcamService initialization during app shutdown

Issues

shutdownHandler() in AppService explicitly called stop() on VirtualWebcamService. Because services load lazily, this caused the service to be instantiated at shutdown time, even when the user never used the virtual camera during the session, triggering unnecessary OBS calls (Windows (OBS_service_isVirtualCamPluginInstalled) and Mac (OBS_service_createVirtualCam)) on every app close.

Fixes

VirtualWebcamService.init() now subscribes to AppService.shutdownStarted, a Subject that fires early in the shutdown sequence before OBS is torn down. Since Subject.next() and stop() are both synchronous, the virtual cam is stopped inline before shutdown continues. The subscription only exists if the service was actually instantiated during the session, so users who never use virtual camera incur no cost. AppService no longer imports or references VirtualWebcamService.

File(s) changed:

• desktop/app/services/app/app.ts
• desktop/app/services/virtual-webcam.ts

Performance Implications

Scenario	Before	After
Virtual cam never used	VirtualWebcamService instantiated + init() run + OBS API called at shutdown	Skipped entirely
Virtual cam was used	stop() called from shutdownHandler	stop() called via shutdownStarted subscription

[bundlemon]

BundleMon

Files updated (1)

Status	Path	Size	Limits
✅	renderer.(hash).js	7.77MB (+28B 0%)	-

Unchanged files (3)

Status	Path	Size	Limits
✅	vendors~renderer.(hash).js	4.67MB	-
✅	updater.js	115.29KB	-
✅	guest-api.js	40.23KB	-

Total files change +28B 0%

Final result: ✅

View report in BundleMon website ➡️

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