fix(daemon): prevent service loss and console flashes after apply

[afonsojramos]

Apply from Spotify now preserves the running daemon, its autostart registration, and the CLI URL handler. RPC work runs on blocking workers, and explicit Apply modes reserve daemon maintenance for the foreground CLI. Watcher repairs stop when another Apply consumes the stock archive. Windows process helpers run without flashing console windows.

Related: #3946

Validation:

• Regression coverage includes RPC responsiveness under lock contention, watcher cancellation, and Windows helper output/exit status without a console.
• CI passes on macOS, Linux, and Windows. The final combined build with fix(v3): restore GraphQL definitions and macOS app handoff #3951 and fix(daemon): preserve macOS launchd ownership during startup #3952 passes 172 workspace tests with three existing ignored tests.
• Native macOS Store flow: Update all, Apply stdlib update, Cancel, reopen, Apply and restart. Spotify 1.3.0.277 returned to Home and the Store, the banner cleared, and stdlib 1.12.0 was active. A published older stdlib artifact was installed through the CLI to prepare this fixture.
• Daemon PID and launch-agent plist survived, health probes had no failures or uptime resets, and the watcher cancelled its transient repair after the archive was consumed.
• Earlier Windows diagnostic RPC Apply passed 84 health probes with maximum latency 28 ms, preserved daemon/autostart/URL registration/update protection, and produced no new OpenConsole process in the 45-second sample.

Windows native UI Apply and first boot after a Spotify version update remain unverified. Windows Update & Apply remains disabled in release builds. The installed test binaries are local builds, not a published release.

See the verification report for setup and limits.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Advanced

Run ID: 57c235fd-3477-4f81-a441-64a2249f8fb7

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}