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_validate.py

@@ -142,3 +142,56 @@ def test_internal_region_check_skipped_when_no_region_supplied() -> None:
         },
     )
     validate_proposal(proposal, frame_contract=_FRAME_CONTRACT)
+
+
+def test_design_adaptation_plan_accepts_structure_only_operations() -> None:
+    proposal = _make(
+        ProposalKind.DESIGN_ADAPTATION_PLAN,
+        {
+            "operations": [
+                {
+                    "op": "increase_repeat_count",
+                    "target": "pillars",
+                    "count": 6,
+                },
+                {
+                    "op": "compact_spacing",
+                    "target": "frame",
+                    "level": "medium",
+                },
+            ],
+            "region_id": "zone_top.region_a",
+        },
+    )
+
+    validate_proposal(
+        proposal,
+        frame_contract=_FRAME_CONTRACT,
+        internal_region=_REGION,
+    )
+
+
+def test_design_adaptation_plan_rejects_generated_text_fields() -> None:
+    proposal = _make(
+        ProposalKind.DESIGN_ADAPTATION_PLAN,
+        {
+            "operations": [
+                {
+                    "op": "increase_repeat_count",
+                    "target": "pillars",
+                    "count": 4,
+                    "label": "AI가 만든 라벨",
+                }
+            ],
+        },
+    )
+
+    with pytest.raises(AiFallbackValidationError, match="content-bearing fields"):
+        validate_proposal(proposal, frame_contract=_FRAME_CONTRACT)
+
+
+def test_design_adaptation_plan_requires_operations() -> None:
+    proposal = _make(ProposalKind.DESIGN_ADAPTATION_PLAN, {"region_id": "zone_top.region_a"})
+
+    with pytest.raises(AiFallbackValidationError, match="operations"):
+        validate_proposal(proposal, frame_contract=_FRAME_CONTRACT)