refactor: default view

[yuqizhou77]

• Since we are going to enable such UI in both prerelease and stable, change the default view to be the one with GitHub Copilot so that the loading state can still show the final correct view. It is still possible we will hide it behind feature flag later, so try to make the change the small rather than completely delete the old view.
• update images. (more will come in later PRs)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.27%. Comparing base (91653fb) to head (9d32428).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #13136   +/-   ##
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  Coverage   90.27%   90.27%           
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  Files         584      584           
  Lines       35126    35126           
  Branches     6945     7033   +88     
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  Hits        31711    31711           
  Misses       1484     1484           
  Partials     1931     1931