feat(web): Add markdown rendering support to pipeline chat messages with toggle (#1826)

* Initial plan

* Add markdown rendering support to pipeline debug dialog messages with toggle button

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* Fix code review feedback: remove conflicting styles and imports

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* perf: styles

* fix: websocket message broadcasting cross-contamination between person and group channels

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>
Co-authored-by: Junyan Qin <rockchinq@gmail.com>

web/src/i18n/locales/ja-JP.ts

@@ -529,6 +529,8 @@ const jaJP = {
       imageUploadFailed: '画像のアップロードに失敗しました',
       reply: '返信',
       replyTo: '返信先',
+      showMarkdown: 'Markdownで表示',
+      showRaw: '原文で表示',
     },
   },
   knowledge: {