feat: support LLM from Azure (Azure OpenAI, Azure AI Foundry)

[devin-ai-integration]

feat: add Azure OpenAI and Azure AI Foundry LLM provider support

Closes #3928

Summary

Adds two new LLM providers to the desktop settings:

• Azure OpenAI — uses the existing @ai-sdk/azure package (createAzure) for chat completions. Model listing hits {baseUrl}/openai/models?api-version=2024-10-21 with api-key header auth.
• Azure AI Foundry — uses @ai-sdk/openai-compatible for models deployed via Azure AI Foundry (Claude, etc.). Model listing hits {baseUrl}/models with api-key header auth.

Both providers require base_url and api_key configuration. Uses Azure and AzureAI icons from @lobehub/icons. No new packages were added — @ai-sdk/azure was already a dependency.

Both providers are marked with a Beta badge since they haven't been tested with real Azure credentials. Each provider's configuration panel includes a subtle "Report issues" link back to #3928.

Files changed:

• shared.tsx — provider definitions, icons, Beta badges
• useLLMConnection.ts — createLanguageModel switch cases
• select.tsx — model listing wiring
• configure.tsx — help text with issue link for settings UI
• list-azure-openai.ts / list-azure-ai.ts — new model listing functions

Review & Testing Checklist for Human

• azure_ai auth headers: The createOpenAICompatible call sets both apiKey (sends Authorization: Bearer) AND a custom api-key header. Verify Azure AI Foundry accepts this dual-header setup, or if the Authorization header needs to be suppressed.
• Model listing schemas: The response schemas for both Azure endpoints (AzureOpenAIModelSchema, AzureAIDeploymentSchema) are based on docs — verify they match real Azure responses by testing with actual Azure credentials.
• Hardcoded API version: api-version=2024-10-21 is hardcoded in the Azure OpenAI model listing URL. Confirm this is acceptable or if it should be configurable.
• End-to-end test: Configure both Azure OpenAI and Azure AI Foundry providers in the desktop app with real credentials. Verify model listing populates, model selection works, and chat completions succeed.

Notes

• Both providers are marked Beta — this should be removed once verified with real Azure accounts.
• Requested by: @ComputelessComputer
• Link to Devin run

[devin-ai-integration]

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