cmux-next: remove Codex collaboration mode from composer footer

Merged
TE
13d ago
+78-45

Leo reported the Codex composer footer showing a Collaboration mode control and said: "idk how i got here we dont want this at all".

The footer now filters Codex's collaboration_mode out of the generic Options chip in every composer state. The underlying option remains in the session fixture and Codex's command/mode paths, including /plan; custom harness options still use the Options chip. The composer gallery includes the reported option in its Codex fixture and verifies the footer look without a Collaboration mode control.

The introducing change is commit fe0e57b3e1cf (fix(chief picker): grouped model menu, per-model effort, Speed row, ACP Options chip). pr-overlap found no open PR already changing this slice.

Gallery evidence (private captures are omitted; the gallery artifact shows the Codex composer footer with no Collaboration mode control):

Validation:

  • bun test test/agent-options-menu.test.tsx (7 passed)
  • bun run gallery:build (passed; two existing CSS pseudo-element warnings)
  • python3 scripts/cmux-next/prepush-gate.py (passed)
  • bun run check reaches formatting, then reports four pre-existing TypeScript errors in unrelated tests: new-tab-composer-layout.test.tsx and thread-minimap-stream.test.tsx
  • scripts/web-lint.sh could not run its Node-backed checks because node is unavailable in this checkout; Bun-scoped formatting and focused tests pass

Agent session: cmux16