feat(doubao): add Doubao AI desktop app CLI adapter

[yunluoxin]

Summary

Add a CLI adapter for Doubao (豆包) AI desktop app - an Electron-based chat application.

Motivation

Doubao is ByteDance's AI assistant desktop application with significant user base. Adding support enables:

• CLI control of the Doubao AI chat
• Automation of AI conversations
• Integration with AI agent workflows

Commands

Command	Description
doubao status	Check CDP connection status
doubao send <text>	Send a message
doubao read	Read chat history
doubao new	Start a new chat
doubao ask <text>	Send and wait for AI response
doubao screenshot	Capture window screenshot
doubao dump	Dump DOM to /tmp/doubao-dom.html

Technical Details

• Uses Chrome DevTools Protocol (CDP) to control the Electron app
• Requires Doubao to be launched with --remote-debugging-port=9226
• Key selectors discovered: [data-testid="chat_input_input"], [data-testid="chat_input_send_button"], [data-testid="message_content"]

Testing

# Start Doubao with debug port
"/Applications/Doubao.app/Contents/MacOS/Doubao" --remote-debugging-port=9226

# Set env and test
export OPENCLI_CDP_ENDPOINT="http://127.0.0.1:9226"
export OPENCLI_CDP_TARGET="doubao-chat"
opencli doubao status
opencli doubao ask "Hello!"

Files

• src/clis/doubao/status.ts - Connection check
• src/clis/doubao/send.ts - Send message via textarea + send button click
• src/clis/doubao/read.ts - Read messages via [data-testid="message_content"]
• src/clis/doubao/ask.ts - Send + poll for AI response
• src/clis/doubao/new.ts - New chat via [data-testid="new_chat_button"]
• src/clis/doubao/screenshot.ts - CDP screenshot
• src/clis/doubao/dump.ts - DOM dump for debugging
• src/clis/doubao/README.md - English documentation
• src/clis/doubao/README.zh-CN.md - Chinese documentation