[macOS] App window positions reset while switching spaces

## Device model, version, and app version
**Model Name:** MacBook Pro, 16-inch, Nov 2023, M3 Max
**macOS Version:** Tahoe 26.5.2
**App Version:** 2026.7.1 (2026.2346)
**Safari Version:** 26.5.2 (21624.2.5.11.8)

## Home Assistant Core Version
2026.7.4

## Bug Description
Positions of app windows reset to different positions (stacked on top of one another) when switching away to a different space and then switching back to the space with the app windows.

## To Reproduce
1. Open Home Assistant for macOS and create several instances of app windows (⌘+N).
2. Position them on the screen in a specific layout.
3. Create a new space and switch to it
4. Switch back to the space with the Home Assistant app windows

## Expected behavior
Windows are in the same position

## Actual behavior
Windows are repositioned and moved to be stacked on top of one another in a different part of the screen

## Screenshots

### Before

### After

Start by reproducing the issue on macOS using several Home Assistant windows, the stated layout, and a second Space. Since the report names no files or tests, locate the app's window-management entry point and verify that returning to the original Space preserves each window's position; done means the layout remains unchanged.

Written by the indexing model from the issue text.