AX Agent 창 제목 고정 및 PPT 품질 재루프 고도화

- 채팅창 Windows 제목을 AX Agent로 고정해 작업 표시줄/Alt+Tab에서 대화 제목이 섞이지 않도록 조정

- Assets/ppt manifest와 템플릿 카탈로그를 추가해 basic100/core100 등 고품질 PPT 자산을 실행 폴더, 소스 루트, AppData 템플릿 폴더에서 안정적으로 탐색하도록 개선

- pptx_create 결과에서 asset missing과 color fallback을 구분해 진단 메시지를 남기고 Cowork에서는 PPT quality/slide alerts/Needs work 기준으로 최대 2회 재생성 루프를 타도록 품질 게이트 추가

- PPT 시스템 프롬프트와 pptx-creator 스킬 지시를 document_plan -> pptx_create 중심으로 정렬

- 검증: dotnet build ...verify_ppt_quality_gate 경고 0/오류 0, dotnet test ...PptxSkillTemplatePackTests|PptxSkillAutoRepairTests|PptxSkillGoldenDeckTests|PptQualityGatePolicyTests|PptxTemplateManifestCatalogTests 통과 12

src/AxCopilot/skills/pptx-creator.skill.md

@@ -14,14 +14,16 @@ allowed-tools:
 tabs: cowork
 ---
 
-Use `pptx_create` as the default path. Do not start with ad-hoc slide arrays unless the user already gave a very detailed deck structure.
+Use `document_plan` plus `pptx_create` as the default path for business decks. Do not start with ad-hoc slide arrays unless the user already gave a very detailed deck structure.
 
 ## Default workflow
 1. Review the workspace for existing presentation files, reports, or templates.
 2. Use `document_plan` with `document_type: presentation` to define the storyline first.
 3. Build a deck brief with `audience`, `objective`, `decision_ask`, and optional `storyline`.
 4. Generate the deck with `pptx_create`.
-5. Return the file path together with the storyline and quality summary.
+5. Prefer `template_pack` or a bundled template (`basic100`, `core100`, etc.) when the deck needs branded polish.
+6. If the returned quality summary is weak, revise the storyline and regenerate the same file instead of stopping.
+7. Return the file path together with the storyline and quality summary.
 
 ## Quality rules
 - Keep one message per slide.