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/test_phase_z2_task23_component_expansion.py

@@ -0,0 +1,47 @@
+from pathlib import Path
+
+from src.phase_z2_pipeline import (
+    _expand_dx_effect_component,
+    _load_component_expansion_registry,
+    parse_mdx,
+)
+
+
+def test_t23_registry_contains_dx_effect():
+    registry = _load_component_expansion_registry()
+    entry = registry["components"]["DxEffect"]
+
+    assert entry["source_path"] == "samples/src/components/dx.astro"
+    assert entry["parent_policy"] == "keep_under_containing_numbered_section"
+    assert "persona_column" in entry["expands_to"]
+
+
+def test_t23_dx_effect_expands_to_three_persona_groups():
+    expanded, trace = _expand_dx_effect_component("before\n<DxEffect />\nafter")
+
+    assert "<DxEffect" not in expanded
+    assert "before" in expanded
+    assert "after" in expanded
+    assert expanded.count("- **") == 3
+    assert trace[0]["component"] == "DxEffect"
+    assert trace[0]["status"] == "expanded"
+    assert trace[0]["persona_count"] == 3
+    assert trace[0]["body_row_count"] >= 1
+
+
+def test_t23_parse_mdx02_expands_dx_effect_inside_parent_section():
+    mdx = next(
+        p for p in Path("samples/mdx").glob("02*.mdx")
+        if "원본" not in p.name
+    )
+
+    _, sections, _ = parse_mdx(mdx)
+    by_id = {s.section_id: s for s in sections}
+    section = by_id["02-2"]
+
+    assert "<DxEffect" not in section.raw_content
+    assert section.raw_content.count("- **") >= 3
+    assert section.sub_sections
+    assert section.sub_sections[0]["component"] == "DxEffect"
+    assert section.sub_sections[0]["status"] == "expanded"
+