Adds the missing 'novita' case to the OpenAI-compatible provider
block in the validate-model API route, fixing 400 errors when
users test their Novita API key in the UI.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add NOVITA_API_KEY and NOVITA_BASE_URL to env.example so users
can discover the configuration variables. Also add novita to
the AI_PROVIDER options list.
Add Novita AI as a new LLM provider with OpenAI-compatible API support.
Users can now select Novita from all entry points (CLI, config, UI).
- Add 'novita' to ProviderName type
- Add Novita AI entry to PROVIDER_INFO with default base URL
- Add Novita suggested models (kimi-k2.5, glm-5, minimax-m2.5)
- Add 'novita' to ALLOWED_CLIENT_PROVIDERS
- Add NOVITA_API_KEY environment variable mapping
- Add novita case to getAIModel() switch using OpenAI-compatible API
- Add novita to SINGLE_SYSTEM_PROVIDERS for proper message handling
