fix: parse alert message for mark query result

[klxiaoniu]

No description provided.

[Copilot]

Pull Request Overview

This PR adds alert message parsing to the mark query functionality to handle cases where students cannot access their grades due to unpaid tuition fees. The main purpose is to provide better error handling by detecting and parsing JavaScript alert messages in the HTML response.

• Added regular expression parsing to detect window.alert() messages in HTML responses
• Enhanced error handling to return specific error messages when grade access is restricted
• Improved user experience by providing clear feedback about access restrictions

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