[codex] Fix Xiaohongshu search navigation

[ppop123]

Summary

• submit Xiaohongshu searches through the visible web search box instead of direct-linking the search results URL
• wait until the page reaches search_result / search_result_ai before extracting note cards
• surface Xiaohongshu security restriction pages (安全限制, 300011, Account abnormal) as typed command errors instead of empty results

Root Cause

xiaohongshu/search navigated directly to /search_result?...source=web_search_result_notes. In current Xiaohongshu web sessions that route can redirect to /website-login/error with 300011 Account abnormal, while manual searches from the web UI still work. The adapter also treated non-result pages as empty data, so callers saw (no data) instead of a clear failure.

Validation

• npx vitest run --project adapter clis/xiaohongshu/search.test.js
• npm run typecheck

Local Live Check

Before preparing this PR, I verified the same change against a logged-in local Chrome/OpenCLI Adapter session with:

opencli xiaohongshu search "增额寿险靠谱吗" --limit 5

The command returned relevant search results instead of (no data).