feat: Auto-focus first session in the session viewer

[MoritzWeber0]

If there is only one sessions, it's focused. If there are more sessions, the session which is added first will be be focused.

[github-actions]

A Storybook preview is available for commit 53edba2.
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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.62%. Comparing base (d06c824) to head (75f5a7f).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1996   +/-   ##
=======================================
  Coverage   84.62%   84.62%           
=======================================
  Files         212      212           
  Lines        7049     7049           
  Branches      492      492           
=======================================
  Hits         5965     5965           
  Misses        924      924           
  Partials      160      160           

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[github-actions]

This report was generated by comparing 53edba2 with d06c824.
If you would like to check difference, please check here.

ArtifactName: reg

✨✨ That's perfect, there is no visual difference! ✨✨

item	count
pass	362
change	0
new	0
delete	0