fix: fix markdown escape issue

[fatelei]

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Summary

fix #30298

because \ in markdown \ mean escape, so it render with only one \

Screenshots

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Screen.Recording.2025-12-29.at.13.10.36.mov

after

Screen.Recording.2025-12-29.at.13.08.24.mov

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[gemini-code-assist]

Summary of Changes

Hello @fatelei, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a display issue where Markdown rendering would consume backslashes in certain strings, leading to incorrect presentation, particularly for Windows UNC paths. The change introduces a pre-processing step to identify and properly format these strings as inline code, ensuring that all backslashes are rendered as intended and improving the accuracy of content display.

Highlights

• Markdown Rendering Fix: Implemented a fix to prevent Markdown from incorrectly interpreting backslashes as escape characters, specifically for strings resembling Windows UNC paths, ensuring they are displayed verbatim.
• Content Pre-processing: Introduced logic to detect strings starting with double backslashes (e.g., \\server\share) and automatically wrap them in inline code blocks ( ) before rendering, preserving their original formatting.

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[gemini-code-assist]

Code Review

This pull request aims to fix a markdown rendering issue where backslashes in strings like Windows UNC paths are treated as escape characters. The proposed solution is to wrap such strings in inline code backticks to ensure they are rendered verbatim. The logic correctly identifies strings starting with \\ and wraps them. However, the implementation includes an unnecessary try-catch block which I've suggested removing to improve code clarity and maintainability.