Feature: Add xueqiu comments/discussions command for individual stocks

[gucasbrg]

Feature Request

Add a xueqiu comments or xueqiu discuss command to fetch comments/discussions for a specific stock.

Current Behavior

Currently xueqiu supports these commands:

• xueqiu stock SH600519 — stock quote (works)
• xueqiu search 茅台 — search stocks (works)
• xueqiu hot — trending posts (works)
• xueqiu hot-stock — trending stocks (works)

But there's no way to get comments/discussions for a specific stock (e.g. posts in the discussion section of https://xueqiu.com/S/SH600519).

Proposed API

# Get latest comments/discussions for a stock
opencli xueqiu comments SH600519 --limit 10

# Or alternatively
opencli xueqiu discuss SH600519 --limit 10

Expected Output

Author	Text	Created_at	Likes	Comments	Retweets
用户名	评论内容...	2026-03-29	42	5	3

Xueqiu API Reference

Xueqiu has a public API for stock discussions:

GET https://xueqiu.com/query/v1/symbol/search/status
Parameters: symbol=SH600519&count=10&sort=time
Cookie: required (from browser session)

Use Case

AI agents need to analyze market sentiment for specific stocks by reading investor discussions. The hot command only returns global trending posts, not stock-specific discussions.

[Astro-Han]

已实现，PR 在这里：#587

这次新增了 xueqiu comments <symbol> --limit <n>，使用 TypeScript adapter 实现，补了适配器测试，并补了一条 browser-auth 的 graceful-failure 用例。

如果你方便的话，可以直接在 PR 里继续 review。