Windows: Codex/Gemini/Kiro tabs visible in UI but yume-cli binary missing from Windows bundle — "yume-cli binary not found"

[exodiac22]

Bug Report

Version: 0.27.0
OS: Windows 11 Pro 10.0.26200
yume-bin: yume-bin-windows-x64.exe

Description

The UI exposes Codex, Gemini, and Kiro provider tabs on Windows, but attempting to send any message in those tabs fails immediately because the yume-cli shim is not bundled in the Windows executable.

Error (from server log)

yume_lib::yume_cli_spawner: Failed to spawn yume-cli session: yume-cli binary not found

Steps to Reproduce

1. Install yume v0.27.0 on Windows 11 via the official installer
2. Open any project
3. Switch to the Codex or Gemini provider tab
4. Send any message

Expected

Either the provider tabs are hidden on Windows (matching the feature flag state), or yume-cli is included in the Windows bundle.

Actual

Tabs are visible and selectable. Sending a message fails with yume-cli binary not found.

Notes

Per docs/expansion-plan/EDGE_CASES_AND_COMPATIBILITY.md, multi-provider is gated behind PROVIDER_GEMINI_AVAILABLE / PROVIDER_OPENAI_AVAILABLE (both false by default). The UI tab gate appears to not be enforcing this on Windows — either the feature flag check is skipped in the Windows build, or yume-cli was accidentally omitted from the Windows release artifact.

Claude provider works correctly; this is isolated to the non-Claude tabs.