Bug: wrong HTTP header key 'WebSearch' instead of 'User-Agent' in web_search.py

[Ricardo-M-L]

Bug Description

In app/tool/web_search.py line 122, the HTTP header dictionary uses "WebSearch" as the key instead of the standard "User-Agent". This means the User-Agent header is never actually sent, which can cause web requests to be blocked by servers that check for a valid User-Agent.

Bug solved method

Change "WebSearch" to "User-Agent" on line 122.

Environment information

• OpenManus version or branch: main

[github-actions]

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