Provider routing and host detection fixes from PR #1190, commit b34780d48d9360d6c349c988e593be440b091c0f.
Fixed
- Automatic research, design, copywriting, and image routes load provider configuration before choosing a fallback. Authenticated Codex and installed Claude seats remain available when Antigravity is absent. Resolves #1174.
- Claude Code runtime markers take precedence over a shared plugin's Codex installation path, preventing Codex council seats from being incorrectly treated as host-native. Resolves #1175.