Improves Tor connection success rate from ~33% to ~80% by retrying failed
circuit establishment attempts with optimized settings.

Add mutt wrapper with msmtp, notmuch, mailcap configuration and
tor fallback for mail sending.

Add muchsync wrapper with automatic host selection trying spora, nether,
retiolum, then tor fallback with lazy dependency loading.

- Split wifi-qr script into wifi-qr.sh
- Split menu scripts into menu-darwin.sh and menu-linux.sh
- Remove get-spora-hosts tool
- Update flake-module.nix files to reference external script files

This improves maintainability and readability of the tool configurations.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Creates isolated Tor instances with random ports for each invocation.
Supports SSH on macOS using ProxyCommand to bypass SIP limitations.
Optimized for fast startup with reduced circuit timeouts.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>