AX Agent 상단 헤더와 대화 목록 메타를 claw-code 쪽으로 정리

- 상단 탭 그룹과 사이드바 토글 버튼을 더 얇은 세그먼트형 UI로 조정

- 좌측 대화 목록의 실행 메타와 편집 아이콘을 더 약하게 줄여 제목 중심의 목록 밀도로 재정렬

- 검증: dotnet build src/AxCopilot/AxCopilot.csproj -c Release -v minimal -p:OutputPath=bin\\verify\\ -p:IntermediateOutputPath=obj\\verify\\ (경고 0 / 오류 0)

docs/DEVELOPMENT.md

@@ -6,6 +6,7 @@
 - Document update: 2026-04-05 17:03 (KST) - Reworked the AX Agent UI skeleton further toward `claw-code`: sidebar width and row heights were tightened, the collapsed icon rail and sidebar header were flattened, status strips were reduced, and the composer shell/input chrome was made slimmer and less card-like.
 - Document update: 2026-04-05 17:03 (KST) - Re-tuned responsive width calculation for the new shell so the message axis now scales up to `880` and the composer up to `820`, keeping both aligned on the same center line as the window narrows or expands.
 - Document update: 2026-04-05 17:12 (KST) - Reduced message action chrome and event-banner density further toward `claw-code`. Message actions now use compact icon-only buttons, and Cowork/Code event banners use tighter margins, smaller metadata, and lighter file-path summaries so execution status stays subordinate to the main transcript.
+- Document update: 2026-04-05 17:19 (KST) - Tightened the top header/tab group and sidebar conversation-row chrome further toward `claw-code`. The top tabs now use a slimmer segmented control, the sidebar toggle button is smaller/lighter, and conversation-row metadata plus the edit affordance were reduced so the title remains the dominant visual anchor.
 - Document update: 2026-04-05 16:02 (KST) - Fixed the Cowork document execution handoff around `document_plan`. The loop no longer depends on broken localized marker strings to detect the scaffold/body block or the immediate-next-step hint; it now extracts body markers robustly and resolves the correct follow-up tool (`html_create`, `document_assemble`, `docx_create`, `markdown_create`) before re-prompting the model.
 - Document update: 2026-04-05 16:02 (KST) - Added `ResolveEffectivePlanMode(...)` so Cowork document/content tasks automatically use the `always` plan path even when the persisted plan mode is `off`. This brings Cowork closer to the `claw-code` expectation of plan-first execution for document-heavy work.
 - Document update: 2026-04-05 16:02 (KST) - Strengthened `BuildCoworkSystemPrompt()` so document/report/proposal/manual requests must produce an execution plan first and are not considered complete until a real output file path has been created or updated.