feat(ollama): add cloud mode support with local/cloud selector

[bryanstevensacosta]

• Add mode selector (Local/Cloud) in Ollama provider configuration
• Implement conditional UI fields based on selected mode
• Add API key authentication support for Ollama Cloud
• Auto-configure base URL based on mode selection
• Support for both local Ollama and cloud.ollama.com
• Improve user experience with clear mode descriptions

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Summary by cubic

Add Cloud mode to the Ollama provider with a Local/Cloud selector. This simplifies setup, adds API key auth for Cloud, and auto-handles base URLs. Set OLLAMA_API_KEY for Cloud; OLLAMA_BASE_URL is optional for Local.

• New Features

  • Mode selector with clear descriptions in Add/Update provider dialogs.
  • Conditional fields and validation: baseURL only for Local; API key only for Cloud.
  • Auto baseURL (ollama.com) and Authorization header for Cloud; sensible defaults for Local.
  • Provider, LLM, and Embedding use mode-aware URLs/headers, including model listing.

• Bug Fixes

  • Added missing Select import in UpdateProviderDialog to ensure the mode selector renders correctly.

^{Written for commit 00a13df. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 5 files