fix(mac): always run tray_update() on the main thread

[andygrundman]

Description

tray_update() makes some macOS UI API calls that must be run on the main thread.

Issues Fixed or Closed

Fixes LizardByte/Sunshine#5319

Type of Change

• feat: New feature (non-breaking change which adds functionality)
• fix: Bug fix (non-breaking change which fixes an issue)
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semicolons, etc.)
• refactor: Code change that neither fixes a bug nor adds a feature
• perf: Code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies
• ci: Changes to CI configuration files and scripts
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit
• BREAKING CHANGE: Introduces a breaking change (can be combined with any type above)

Checklist

• Code follows the style guidelines of this project
• Code has been self-reviewed
• Code has been commented, particularly in hard-to-understand areas
• Code docstring/documentation-blocks for new or existing methods/components have been added or updated
• Unit tests have been added or updated for any new or modified functionality

AI Usage

• None: No AI tools were used in creating this PR
• Light: AI provided minor assistance (formatting, simple suggestions)
• Moderate: AI helped with code generation or debugging specific parts
• Heavy: AI generated most or all of the code changes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[ReenigneArcher]

Changes needed in #145 as well? Planning to move to QT once I figure out the Windows and macOS packaging for Sunshine in LizardByte/Sunshine#5260

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.32%. Comparing base (27b67b7) to head (edf5e22).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #157      +/-   ##
==========================================
- Coverage   64.14%   63.32%   -0.82%     
==========================================
  Files           5        5              
  Lines         647      638       -9     
  Branches      214      213       -1     
==========================================
- Hits          415      404      -11     
- Misses        154      155       +1     
- Partials       78       79       +1     

Flag	Coverage Δ
Linux-qt5	54.03% <ø> (ø)
Linux-qt6	54.03% <ø> (ø)
Windows	70.67% <ø> (ø)
macOS	53.84% <ø> (-5.45%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/tray_darwin.m	72.72% <ø> (-5.18%)	⬇️

... and 1 file with indirect coverage changes

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[github-actions]

Last Updated	2026-06-28 12:51:39 UTC
Source Run	CI Run #699
Commit	edf5e22ebb97892933c61d8b1e60201e1db003c4

Screenshot Comparison

PR #157 screenshots vs screenshots baseline.

Matrix: Linux-qt5

Image	Baseline	PR
tray_icon_initial.png
tray_icon_svg.png
tray_icon_themed.png
tray_menu_checkbox_checked.png
tray_menu_checkbox_unchecked.png
tray_menu_left_click.png
tray_menu_shown.png
tray_notification_displayed.png
tray_notification_themed_icon.png

Matrix: Linux-qt6

Image	Baseline	PR
tray_icon_initial.png
tray_icon_svg.png
tray_icon_themed.png
tray_menu_checkbox_checked.png
tray_menu_checkbox_unchecked.png
tray_menu_left_click.png
tray_menu_shown.png
tray_notification_displayed.png
tray_notification_themed_icon.png

Matrix: Windows

Image	Baseline	PR
tray_icon_initial.png
tray_menu_checkbox_checked.png
tray_menu_checkbox_unchecked.png
tray_menu_shown.png
tray_notification_displayed.png

Matrix: macOS

Image	Baseline	PR
tray_icon_initial.png
tray_menu_checkbox_checked.png
tray_menu_checkbox_unchecked.png
tray_menu_shown.png
tray_notification_displayed.png