cc-copilot 0.18.0

Codex-aware /here, expanded /model provider catalog, and faster cockpit prompt browsing.

Highlights:

• /here can attach to current live Codex sessions as well as Claude.
• /model adds more OpenAI-compatible providers and provider refs like /model openai/gpt-5.5 or /model google/gemini-3.1-flash-lite.
• Composer prompt history uses Up/Down; Esc clears drafts; double-Esc opens rewind.
• The chat pane has a sticky prompt header; empty-input Left/Right jumps between prior prompts, and the header is clickable.