Fix toggle sidebar icon alignment after Add Site modal

[sejas]

Related issues

• Fixes STU-1309

Proposed Changes

• Fix the traffic light position when hiding them, for example, after the Add Site modal opens.

Long explanation:

• Extract the macOS traffic light position ({ x: 20, y: 20 }) into a shared MACOS_TRAFFIC_LIGHT_POSITION constant in constants.ts
• Use the constant in main-window.ts instead of the hardcoded literal
• After calling setWindowButtonVisibility(true) in the setWindowControlVisibility IPC handler, restore the custom position via setWindowButtonPosition(MACOS_TRAFFIC_LIGHT_POSITION) — this fixes the alignment shift caused by Electron not preserving the custom trafficLightPosition when re-showing window buttons

Testing Instructions

• Start the app with npm start on MacOS
• Click "Add Site" to open the modal, or press cmd+n
• Close the modal without creating a site, or press esc
• Verify the macOS traffic lights (red/yellow/green) and the "Toggle sidebar" icon remain in their correct position — they should not shift

Before

window-buttons-mac-before.mp4

After

window-buttons-mac-after.mp4

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors? (Tests pass, no errors)

[bcotrim]

Works as described
LGTM 👍

[epeicher]

Thanks for fixing this @sejas! I have tested it, and it works as expected, I don't see the misalignment anymore on this branch. LGTM!

Before	After