feat: render LSP tool output in chat

Adds expandable LSP tool rows with scan icon and stable file path display
Adds formatted/raw JSON output toggle and copy action
Improves compact LSP input formatting

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

@@ -1826,6 +1826,11 @@ export const dict: Record<I18nKey, string> = {
   'chat.toolPart.awaitingResponse': '응답 대기 중…',
   'chat.toolPart.noOutputProduced': '출력 없음',
   'chat.toolPart.output': '출력',
+  'chat.toolPart.showRawJson': '원시 JSON 표시',
+  'chat.toolPart.showFormattedJson': '형식화된 JSON 표시',
+  'chat.toolPart.copyOutput': '출력 복사',
+  'chat.toolPart.copiedOutput': '출력 복사됨',
+  'chat.toolPart.copyOutputFailed': '출력을 복사하지 못했습니다',
   'chat.toolPart.openSubtask': '{type} 하위 작업 열기',
   'chat.todo.total': '전체',
   'chat.todo.inProgress': '진행 중',