refactor: modular .bashrc.d/ structure
- Rewrite .bashrc as minimal loader (34 lines → loads .bashrc.d/*.sh)
- Clean .bash_profile: single source, Apple Silicon/Intel brew path
- Add .bashrc.d/ with 7 topic modules:
00_env.sh PS1, OSTYPE, colors, pyenv
10_aliases.sh universal aliases
20_functions.sh proxy, dbash, git helpers
30_work.sh work-host detection, LDAP, AWX, Juniper tools
(+ unified-hub-login with env-var creds)
40_k8s.sh kubectl completion + aliases
50_ai_env.sh WORKSPACE/DATA_ROOT/MODEL_ROOT paths
60_dotfiles.sh dotfiles manager aliases, zet shortcuts
- Secrets (SN_PASSWORD, LDAP bind PWs, Unified Hub token) moved
to ~/.bashrc.local (gitignored, written by setup script)
- Update .dotfiles_manifest to track .bashrc.d directory
32be384c0e