Use OS-independent path for generated figure

[AndreyBunchuk]

Fix generated map path on Windows

Problem

When running PrettyMaps on Windows, a FileNotFoundError occurs when trying to open the generated map file:

FileNotFoundError: [Errno 2] No such file or directory: '/tmp/generated_map.png'

The error occurs in app.py when opening the generated file:

with open(fig_path, "wb") as f:

The hardcoded /tmp/ path is Unix-specific and does not work correctly on Windows.

Solution

Replaced the hardcoded path with an OS-independent temporary directory:

fig_path = os.path.join(tempfile.gettempdir(), "generated_map.png")

This uses the appropriate temporary directory for the operating system.

Result

The map generation and download functionality now works correctly on Windows while remaining compatible with Unix-based systems.