wip: phase_z2 evidence 파이프라인 + matching 실험(phase2~26) + 프론트 trace 패널 진행분 스냅샷

- src: phase_z2 composition/mapper/pipeline/placement_planner/retry, ai_fallback(prompts/schema/validate), mdx_text_atoms 신규
- Front: PipelineTracePanel 신규, FramePanel/SlideCanvas/Home/designAgentApi 등 갱신 + 테스트 4종 추가
- templates/phase_z2: catalog(component_expansion_registry, node_slot_mapping 신규), frames, families, slide_base 갱신
- tests/matching: phase2~26 매칭 실험 스크립트·리포트·온톨로지 전체 (미커밋 진행분)
- tests: b4_v4 evidence, task5~28.5 시리즈, regression(imp95 baseline) 등 신규 테스트 대량 추가
- docs/reference: MDX 구조 인벤토리, MDX→Frame 구조 계약 문서
- scripts: mdx 계약/parity/coverage/viewport 체크, gitea comment, run sync 유틸
- .gitignore: tmp*.json, chromedriver, .orchestrator, *.pkl, Front_test* 등 임시/스냅샷 제외

미완성 작업의 보존용 스냅샷 커밋 (2026-07-02)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/phase_z2_ai_fallback/test_prompts.py

@@ -59,6 +59,11 @@ def test_system_prompt_locks_frame_id_swap() -> None:
     assert "frame_id" in SYSTEM_PROMPT
 
 
+def test_system_prompt_prefers_design_adaptation_plan_not_text_slots() -> None:
+    assert "design_adaptation_plan" in SYSTEM_PROMPT
+    assert "Do NOT create titles, labels, summaries, body text, or slot content" in SYSTEM_PROMPT
+
+
 def test_build_prompt_returns_system_and_user() -> None:
     prompt = build_ai_fallback_prompt(**_inputs())
     assert set(prompt.keys()) == {"system", "user"}
@@ -78,6 +83,10 @@ def test_user_payload_carries_all_inputs_and_marks_mdx_read_only() -> None:
     assert "mdx_text_READ_ONLY" in payload
     assert payload["mdx_text_READ_ONLY"].startswith("# 대목차")
     assert "mdx_text" not in payload  # only the READ_ONLY key, not a writable alias
+    assert payload["task12_output_contract"]["preferred_proposal_kind"] == (
+        "design_adaptation_plan"
+    )
+    assert "slots" in payload["task12_output_contract"]["forbidden_content_fields"]
 
 
 @pytest.mark.parametrize(