feat: add Azure OpenAI provider support

[Bl3f]

Summary

Adds Azure OpenAI as a supported LLM provider using the @ai-sdk/azure package.

Changes

Backend (apps/backend/)

• Added 'azure' to llmProviderSchema enum in types/llm.ts
• Added AzureOpenAIResponsesProviderOptions to ProviderConfigMap
• Added Azure entry to PROVIDER_META in provider-meta.ts with:
  • API key authentication (required)
  • Extra fields: Resource Name (alternative to base URL), API Version, Use Deployment-Based URLs
  • Hint clarifying that either Resource Name or Base URL should be provided, not both
  • AZURE_API_KEY env var, AZURE_OPENAI_BASE_URL base URL env var
  • Empty models list — Azure deployments are user-specific and depend on the base URL / resource, so no default models are hardcoded
  • Empty extractorModelId / summaryModelId (users must configure their own deployment names)
• Added Azure factory in LLM_PROVIDERS in providers.ts using createAzure from @ai-sdk/azure
  • Base URL takes precedence over resource name when both are provided
  • apiVersion and useDeploymentBasedUrls are forwarded to createAzure when set
  • All extra fields fall back to their respective env vars
  • Uses Responses API by default (consistent with the @ai-sdk/azure SDK default)
• Guarded getDefaultModelId against empty models arrays to prevent crashes

Frontend (apps/frontend/)

• Added Azure SVG icon
• Added 'azure' case to LlmProviderIcon component
• Added 'Azure OpenAI' label to providerLabels in usage filters

Config

• Added Azure env vars to .env.example
• Installed @ai-sdk/azure dependency

Environment Variables

Variable	Description
AZURE_API_KEY	Azure OpenAI API key
AZURE_RESOURCE_NAME	Azure resource name (builds https://{name}.openai.azure.com) — alternative to base URL
AZURE_OPENAI_BASE_URL	Full base URL override — alternative to resource name
AZURE_API_VERSION	API version (defaults to v1)
AZURE_USE_DEPLOYMENT_BASED_URLS	Set to true for legacy deployment URL format

Testing

• ✅ npm run lint -w @nao/backend — passes
• ✅ npm run lint -w @nao/frontend — passes

  

[github-actions]

🚀 Preview Deployment

URL	https://pr-525-419ed77.preview.getnao.io
Commit	419ed77

⚠️ No LLM API keys configured - you'll see the API key setup flow when trying to chat.

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