fix(ai-dev): stop entrypoint clobbering host ~/.local/bin and resolve TERM=xterm-ghostty

[binarypie]

Summary

Fixes to the ai-dev and nvim-dev development container environments.

1. Stop the ai-dev entrypoint clobbering host ~/.local/bin/{claude,agy}

ai-entrypoint.sh force-symlinked $HOME/.local/bin/{claude,agy} (and $HOME/.local/share/claude) to their /home/linuxbrew install paths. Because the wrappers mount the current directory at its real path (-v "$(pwd):$(pwd):rw") and $HOME is the host home, running claude/agy from the home directory wrote those symlinks straight to the host — replacing the real ~/.local/bin/claude and ~/.local/bin/agy wrapper scripts with dangling links into the image (which looked like Homebrew packages because linuxbrew is the build user, though both tools are actually curl-installed).

The tools are already on PATH via /home/linuxbrew/.local/bin, so the symlinks were redundant. Removed the symlink block entirely.

2. Resolve TERM=xterm-ghostty in the ai-dev container

The ai-dev wrappers never propagated TERM, so podman defaulted it to a generic value and Ghostty's terminal capabilities were lost, producing awkward escape sequences in the Claude Code / Antigravity TUIs.

• Pass TERM through to the container in claude.sh / agy.sh / enter.sh
• Install the xterm-ghostty terminfo explicitly in the ai-dev image so it is self-sufficient even if the nvim-dev base changes
• Add an entrypoint fallback to xterm-256color when TERM is empty or has no terminfo entry

3. xterm-ghostty TERM fallback safety net in nvim-dev

nvim-dev already bakes the xterm-ghostty terminfo and inherits TERM from the host via distrobox. Added a shell-init fallback (POSIX /etc/profile.d + fish conf.d) that degrades to xterm-256color when TERM has no terminfo entry, so interactive TUIs never emit raw escape sequences if xterm-ghostty is ever unavailable.

Recovery for already-broken ai-dev installs

rm -f ~/.local/bin/claude ~/.local/bin/agy ~/.local/share/claude
just ai-setup   # re-copies the wrapper scripts into ~/.local/bin

Notes

Changes under dot_files/ai-dev/** and dot_files/nvim/** trigger the build-ai-dev.yml / build-nvim-dev.yml workflows; the image fixes take effect after a rebuild + just ai-upgrade / re-create of the distrobox container.

https://claude.ai/code/session_01WQzgxRCuruWxbRv66shWeQ