This commit addresses two issues in the Ollama-OpenRouter proxy:
Fixed "Cannot read properties of undefined (reading 'content')" error:
Added missing "message" field with empty content to the final streaming response
This ensures the frontend can always access message.content without errors
Improved model name handling in GetFullModelName:
Added check to populate model list if empty
Implemented multi-stage matching (exact match, then suffix match)
Fallback to using the provided model name directly if no match found
This allows direct use of model names like 'deepseek-chat-v3-0324:free'
Added logging for model name resolution to help with debugging
