embedded chatbot add reset session button

[yanghx-git]

Description

embedded chatbot add reset session button

before

after

Fixes #5463

Type of Change

Please delete options that are not relevant.

• [x] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [ ] TODO

Suggested Checklist:

• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] My changes generate no new warnings
• [x] I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods
• [x] optional I have made corresponding changes to the documentation
• [x] optional I have added tests that prove my fix is effective or that my feature works
• [x] optional New and existing unit tests pass locally with my changes

[yanghx-git]

Is there any problem? @zxhlyh @JzoNgKVO

[crazywoola]

Is there any problem? @zxhlyh @JzoNgKVO

This is under UI review. There might be a few changes.