File tree browser is open for first time user experience

Chaoyue Zhaorequested to merge
ftb-open-by-default into master

What does this MR do and why?

File tree browser is open for first time user experience

References

#583721

Screenshots or screen recordings

CleanShot_2025-12-11_at_08.51.30

How to set up and validate locally

  1. Enable the repository_file_tree_browser flag
  2. Make sure there is no entry with file_tree_browser_visibility in local storage
  3. Navigate to either the repository blob viewer or tree list
  4. Browser should open by default

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Resolves #583721

Edited by Chaoyue Zhao

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