feat(cli): improve chat endpoint configuration priority

[ruansheng8]

Description

The ov chat command does not use the URL defined in ovcli.conf.

ovcli.conf

{
    "url": "http://192.168.1.1:1933",
    "api_key": "xxx",
    "timeout": 60.0,
    "output": "table"
}

PS D:\Temp\shell> ov --version
openviking 0.2.6

PS D:\Temp\shell> ov ls viking://resources/
cmd: ov ls viking://resources/ -l 256 -n 256
uri                                    size  isDir  modTime     abstract                                                                                                                                                                        
viking://resources/sky-framework-docs  4096  true   2026-03-30  This directory serves as a specialized container for enterprise-grade technical documentation and framework resources, specifically housing the comprehensive knowledge base for the Java framework enterprise technology ...

PS D:\Temp\shell> ov chat -m "What is 2+2?"
Error: Network error: Failed to send request: error sending request for url (http://localhost:1933/bot/v1/chat/stream)
PS D:\Temp\shell>

Summary

Improve ov CLI chat command endpoint configuration logic with new configuration priority support and add a helper script for starting the server.

Changes:

1. ov CLI chat command endpoint configuration optimization (crates/ov_cli/src/main.rs)

   • New configuration priority: VIKINGBOT_ENDPOINT env var > OPENVIKING_URL env var + /bot/v1 > config file url + /bot/v1
   • Previous logic only supported VIKINGBOT_ENDPOINT env var or hardcoded default value
   • Now supports dynamically specifying server address via OPENVIKING_URL env var

2. New server startup script (start_server.py)

   • Provides quick uvicorn server startup
   • Supports hot reload (reload=True) for development debugging

Type of Change

• New feature (feat)
• Bug fix (fix)
• Documentation (docs)
• Refactoring (refactor)
• Other

Checklist

• Code follows project style guidelines
• Tests added for new functionality
• Documentation updated (if needed)
• All tests pass

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