refactor: improve ui of logout page

[ruibaby]

What type of PR is this?

/area core
/kind improvement
/milestone 2.20.x

What this PR does / why we need it:

优化退出登录页面的 UI。

Does this PR introduce a user-facing change?

None

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 57.01%. Comparing base (d7aba83) to head (83a2a38).
Report is 12 commits behind head on main.

Files with missing lines	Patch %	Lines
...un/halo/app/security/LogoutSecurityConfigurer.java	0.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6810      +/-   ##
============================================
- Coverage     57.03%   57.01%   -0.03%     
- Complexity     3978     3979       +1     
============================================
  Files           713      713              
  Lines         23992    24009      +17     
  Branches       1570     1572       +2     
============================================
+ Hits          13685    13689       +4     
- Misses         9696     9709      +13     
  Partials        611      611              

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[sonarcloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

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

See analysis details on SonarCloud

[JohnNiang]

It works very well.

/lgtm

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JohnNiang

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