• Merge pull request #505 from kaitranntt/kai/feat/503-ccs-env-command
• fix(env): improve empty profile UX and consolidate shell validation constants
• fix(env): sync CLIProxy profiles across all shell completions and improve error messages
• fix(env): add missing CLIProxy profiles to bash completion and shell validation
• docs: update local docs for ccs env command
• fix(env): address P1-P3 review items from code review
• fix(env): fix fish escaping, profile parsing, and add OPENAI_MODEL mapping
• fix(env): address all PR review feedback
• chore: update lockfiles
• fix(env): add key sanitization and shell completions
• fix(env): use single quotes to prevent shell injection via eval
• feat(env): add ccs env command for third-party tool integration