Closing Sable to system tray breaks single-instance protection

[hazre]

Describe the bug

After closing Sable to the system tray (clicking X with "close to background" enabled), single-instance protection stops working. Subsequent launches either cause the original process to freeze silently or spawn new processes with no visible window. This is an upstream Tauri bug, not caused by Sable's code.

Reproduction

1. Launch Sable.
2. Click the X button to close to tray (default behavior).
3. Launch Sable again (via shortcut, exe, etc.).
4. The original process freezes, a new process may appear but shows no window.
5. Repeat: each launch creates more dead processes until killed from Task Manager.

Expected behavior

Clicking X hides Sable to the tray. Launching Sable again brings the existing window to focus. No new processes, no freezing.

Platform and versions

- OS: Windows (might be happening on other OS's as well)
- Sable version: any tauri nightly desktop version

Additional context

No response