Self-update mechanism

[PyXiion]

Origin of idea

Users must manually download new releases from GitHub. No notification or in-app update path.

Suggestion / proposed solution

On startup (or periodic check), query https://api.github.com/repos/PyXiion/PxModRim/releases/latest. Compare version against the tag. Offer:

• "Download" — opens release page in browser
• "Download and install" — downloads the appropriate binary, replaces current, prompts restart (Nuitka builds only)
  Add a "Check for updates" menu item. Respect a "skip this version" preference per release tag.

Alternatives considered

No response

Additional context

No response