Bugfix copy button not working

[knktc]

No description provided.

[Copilot]

Pull Request Overview

This PR implements a fix for a non-working copy button by adding client-side JavaScript functionality to copy request body content to the clipboard. The implementation includes both modern clipboard API support and fallback mechanisms for older browsers.

Key changes:

• Replaced toLocaleString() with a custom formatTime() function for consistent timestamp formatting
• Added comprehensive copy button functionality with visual feedback and error handling
• Implemented clipboard API with fallback support for non-HTTPS contexts

[Copilot]

The error message is hardcoded in Chinese ('失败' means 'failed'). This should use the translation system like the success message does, e.g., ${translations[currentLang]['failed']} to maintain consistency with the internationalization approach used elsewhere.

Suggested change

	<span>失败</span>
	<span data-i18n="failed">${translations[currentLang]['failed']}</span>

[Copilot]

The document.execCommand('copy') method is deprecated. While it's used as a fallback here, consider adding error handling since this method can fail and returns a boolean indicating success/failure.

Suggested change

	document.execCommand('copy');
	document.body.removeChild(textArea);
	const successful = document.execCommand('copy');
	document.body.removeChild(textArea);
	if (!successful) {
	throw new Error('Fallback copy method failed.');
	}