On startup, Wraith checks if wraith-mcp-bridge exists in the data
directory. If missing or version mismatch, downloads the correct
version from Gitea packages automatically. No installer changes needed.
Flow:
1. Check data_dir/wraith-mcp-bridge.exe exists
2. Check data_dir/mcp-bridge-version matches app version
3. If not, download from packages/vstockwell/generic/wraith/{ver}/
4. Set execute permissions on Unix
5. Write version marker
Also exposes mcp_bridge_path command so the frontend can show the
path in settings for users to add to PATH or configure Claude Code.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
