refactor: improve Ollama and LM Studio configuration with environment…

[PineArt]

… variable support

• Add environment variable support for Ollama configuration (OLLAMA_BASE_URL, OLLAMA_SERVER_URL, OLLAMA_API_KEY, OLLAMA_NUM_CTX, OLLAMA_MODEL_ID)
• Implement proper configuration priority: environment variables > VS Code settings > defaults
• Update lmstudio.ts to use refreshModels with baseUrl parameter
• Refactor webviewMessageHandler to use new refreshModels function for forced cache refresh
• Add normalizeToolSchema to ensure JSON Schema compatibility with Ollama's Go unmarshaler
• Improve comments to clarify configuration behavior

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• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
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Important

Refactor Ollama and LM Studio configurations to support environment variables, prioritize them over settings, and improve cache management with refreshModels.

• Configuration:
  • Add environment variable support for Ollama (OLLAMA_BASE_URL, OLLAMA_SERVER_URL, OLLAMA_API_KEY, OLLAMA_NUM_CTX, OLLAMA_MODEL_ID) in native-ollama.ts.
  • Prioritize configuration: environment variables > VS Code settings > defaults.
• Cache Management:
  • Replace flushModels with refreshModels in lmstudio.ts and webviewMessageHandler.ts for cache refresh with baseUrl.
• Utilities:
  • Add normalizeToolSchema in native-ollama.ts for JSON Schema compatibility with Ollama's Go unmarshaler.
• Comments:
  • Improve comments for configuration behavior clarity.

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[roomote]

Rooviewer   See task on Roo Cloud

Reviewed the environment variable support changes. Found one issue to address before merging.

• Error message in ECONNREFUSED handler shows incorrect URL when env vars are set (native-ollama.ts:162-167)

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}

[roomote]

With this new priority chain, the error message in the ECONNREFUSED handler (line 334) becomes inconsistent. It still references this.options.ollamaBaseUrl || "http://localhost:11434" but the actual host used could differ when environment variables are set. Users debugging connection failures would see a misleading URL in the error message.

Consider storing the resolved host as an instance property (e.g., this.resolvedHost) so the error message can reference the actual URL being used.

_{Fix it with Roo Code or mention @roomote and request a fix.}