feat: add navigable JSON summaries for tool output

Tool JSON output now starts with a compact navigable summary view.
Expandable tool output includes quick open-file and diff actions for changed files.
Reasoning headers strip stray HTML comments, and navigation tools stay compact.

packages/ui/src/lib/i18n/messages/ko.ts

@@ -1987,6 +1987,9 @@ export const dict: Record<I18nKey, string> = {
   'chat.toolPart.output': '출력',
   'chat.toolPart.showRawJson': '원시 JSON 표시',
   'chat.toolPart.showFormattedJson': '형식화된 JSON 표시',
+  'chat.toolPart.showNavigableJson': '탐색 가능한 JSON 표시',
+  'chat.toolPart.openFileAtFirstChange': '첫 번째 변경 위치에서 파일 열기',
+  'chat.toolPart.openFileDiff': '파일 diff 열기',
   'chat.toolPart.copyOutput': '출력 복사',
   'chat.toolPart.copiedOutput': '출력 복사됨',
   'chat.toolPart.copyOutputFailed': '출력을 복사하지 못했습니다',