feat(web): enable \(...\) as inline math delimiter in kimi web

What feature would you like to see?

Enable \(...\) as an inline math delimiter in kimi web.

Currently, apps/kimi-web/src/components/chat/Markdown.vue (disableInlineMath) disables markdown-it's inline math rule entirely, so no inline math renders at all — $...$, \(...\), and mid-paragraph $$...$$ all show as raw source. Only standalone $$...$$ blocks are rendered.

\(...\) is the safe way to bring inline math back:

• It contains no $, so literal text like $5, $PATH, $HOME/bin — the original reason inline math was disabled — stays completely untouched.
• markstream's inline math rule already recognizes \(...\) (markstream-vue/packages/markdown-parser/src/plugins/math.ts); the current blanket disable('math') kills it together with $...$. Re-enabling just the \(...\) branch is enough.

Inline math is heavily used in technical and scientific answers, and models default to it — so a large fraction of math output currently degrades to raw LaTeX source on the web. The VSCode extension webview already renders inline math (remark-math + rehype-katex), so the same answer also renders inconsistently across surfaces.

Additional information

No response

Start in apps/kimi-web/src/components/chat/Markdown.vue at disableInlineMath, then read markstream-vue/packages/markdown-parser/src/plugins/math.ts to understand its existing (...) recognition. The change is complete when escaped-parenthesis inline math renders in kimi web while literal text such as $5 and $PATH remains untouched, without restoring other dollar-based inline forms.