chore(eslint): enforce Vue lint rules

[CipherZ3r0]

Closes #13510

fix

Technical

Promotes five Vue ESLint rules from warn to error in eslint.config.cjs:

• vue/require-prop-types
• vue/require-explicit-emits
• vue/require-default-prop
• vue/no-v-html
• vue/no-template-shadow

Testing

• npx eslint . → exit 0, no output (0 errors, 0 warnings)
• npm run lint → both lint:js and lint:css exited 0 (0 errors, 0 warnings)
• No inline eslint-disable comments were added.

Stakeholders

@RayBB

[RayBB]

Thanks for opening the pull request. Since the person who commented earlier also opened a pull request around the same time I merged theirs in, in the future please try to comment on the pull request as specified. I’d, but I appreciate your contribution and I hope you can work on some more things.