코워크 문서 계획/생성 흐름을 claw-code 기준으로 복구

- document_plan 결과에서 body 골격과 후속 생성 도구를 안정적으로 추출하도록 AgentLoop 분기를 수정

- 코워크 문서형 작업은 planMode=off여도 계획 선행(always) 경로를 타도록 보정

- 코워크 시스템 프롬프트를 강화해 계획만 제시하고 끝나지 않고 실제 문서 파일 생성까지 이어지게 조정

- README와 DEVELOPMENT 문서에 2026-04-05 16:02 (KST) 기준 변경 이력 반영

- 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

@@ -1,5 +1,8 @@
 # AX Copilot - 媛쒕컻 臾몄꽌
 
+- 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.
 - Document update: 2026-04-05 15:34 (KST) - Rebased the AX Agent improvement plan on actual `claw-code` runtime files instead of prior AX snapshots. The active reference spine is `src/bootstrap/state.ts -> src/bridge/initReplBridge.ts -> src/bridge/sessionRunner.ts -> src/screens/REPL.tsx -> src/components/Messages.tsx -> src/components/StatusLine.tsx`.
 - Document update: 2026-04-05 15:34 (KST) - Locked the AX implementation order to the same quality sequence used by that spine: runtime state canonicalization, prepared execution unification, loop event normalization, timeline render parity, composer/status strip simplification, and recovery/resume validation.
 - Document update: 2026-04-05 15:42 (KST) - Moved the cross-tab conversation restoration path for execution events and agent-run history from `ChatWindow.xaml.cs` into `AxAgentExecutionEngine`. `AppendExecutionEvent` and `AppendAgentRun` now go through one engine-owned session mutation helper, which preserves the active tab conversation while updating the target tab timeline.