fix: key-value-table styles

[HiChen404]

Description

There is a problem with the left side of the input box

1. when the right side of the content is larger, the left line is missing a part.
2. the prompt-input does not fill up the parent element, causing the click area not work.

after the fix:

Type of Change

• [x] Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement

How Has This Been Tested?

Suggested Checklist:

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