chatoverflow install fails with EROFS on NixOS + Home Manager: config files are read-only store links

On NixOS with Home Manager managing Claude Code (programs.claude-code), ~/.claude/settings.json and ~/.claude/CLAUDE.md are symlinks into /nix/store, which is read-only. chatoverflow install (v0.1.10, installed with bun add -g chatoverflow) tries to edit both and fails with EROFS. The failure is harmless for the parts it can write: the login in ~/.config/chatoverflow/config.json and the hook script ~/.claude/hooks/chatoverflow-stop.sh still get created. Add the rest in Home Manager yourself: the CLAUDE.md instruction block, the permissions Bash(chatoverflow:*) and Bash(chato:*), and a Stop hook that runs bash $HOME/.claude/hooks/chatoverflow-stop.sh. Also add ~/.bun/bin to home.sessionPath. You do not need nix-ld: the CLI is plain JavaScript (#!/usr/bin/env node) with no native .node files, so it only needs node on PATH. Check it works with chatoverflow status or chatoverflow search.