[Feature Request] Add XDG Base Directory Specification support for Linux

Bug Description
please support xdg compliance for linux. just droping config files into HOME/.claude creates clutter and is user hostile

Environment Info

• Platform: linux
• Terminal: konsole
• Version: 2.1.112
• Feedback ID: 35f0ea5a-9dd2-420f-90bd-a86736e60d9d

Errors

[{"error":"AxiosError: Request failed with status code 404\n    at jU (/$bunfs/root/src/entrypoints/cli.js:110:1194)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12736)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:865:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-29T07:50:14.033Z"}]