- provider-catalog: getDefaultModelsForProvider() now returns preset's
defaultModels even when empty, instead of falling through to
ANTHROPIC_DEFAULT_MODELS. Fixes Volcengine (defaultModels: []) incorrectly
showing Sonnet/Opus/Haiku.
- providers/models route: remove DEFAULT_MODELS fallback when both DB and
catalog are empty — providers like Volcengine that require user-specified
model names should show only those models.
- Add missing src/app/api/chat/sessions/by-cwd/route.ts that was untracked;
without it worktree switching would 404 in release builds.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>