feat(catalog): activate construction_goals_three_circle_intersection (IMP-04 Track A 2/16)

Reason : V4 strongest UAI tier candidate (use_as_is=1 for 02-1, light_edit=1
for 01-1, restructure=1). Track A frame 2 per Codex rounds 30/33/35 V4-
priority rule. F14 clean pass completed at 834ed39; this is the next
Track A activation.

3-layer architecture context (matrix §0) :
- V4 = matching authority — V4 ranked this frame as use_as_is for the
  "DX의 궁극적 목표" section (02-1) and light_edit for "용어 정의" (01-1).
- figma_to_html (1171281189) = rich source/evidence — 510-line index.html
  base, full analysis/flat/texts/assets present (A+T+I+F+S).
- Phase Z = runtime orchestration — this commit adds the runtime contract,
  builder, partial, and fixture so the V4 candidate can be assembled.

New runtime additions :

1. src/phase_z2_mapper.py — new `cycle_intersect_3` PAYLOAD_BUILDERS entry
   - Reuses existing `quadrant_item` ITEM_PARSERS (label only, body
     ignored) — F16 parser reused, no new parser.
   - Produces flat keys : circle_1_label / circle_2_label / circle_3_label
     + intersection text (optional) — distinct from F16's quadrant_N_body
     structure since this frame's 3 main circles use labels only.
   - pad_to=3, truncate_at=3, configurable via builder_options.

2. templates/phase_z2/families/construction_goals_three_circle_intersection.html
   - Adapted from figma_to_html_agent/blocks/1171281189/index.html.
   - Slot mapping : title + 3 circle labels + optional intersection text.
   - PROMOTED CSS : 3 circle gradients (safety #BC652B/#A24200, productivity
     #897445/#3E3523, trust #296B55/#123328) + outer multiply blend +
     title gradient (#000 → #883700, F13/F14 zone-title family) + main
     label typography (white text + shadow).
   - NOT PROMOTED (P1 case-by-case, compact zone fit) : 6 accent hanja
     circles (安/質/速/利/通/信), 6 side labels (안전성 제고 etc.), 3
     decoration rects, 3 arc images, bg-texture multiply image. These
     are Figma-side decorative content not in MDX and would clutter a
     Phase Z zone of ~320 px.
   - ADAPTED : Figma 70/50/40 px → token-fixed font sizes, 350×350
     absolute-positioned overlapping circles → 110×110 flex row (cycle
     intent expressed via intersection text instead of geometric overlap).

3. templates/phase_z2/catalog/frame_contracts.yaml — append F12 contract
   - template_id, frame_id 1171281189, family=diagram, source_shape=
     top_bullets, strict cardinality 3, role_order [safety, productivity,
     trust].
   - visual_hints.min_height_px = 320, derived from 3 circle row 80 +
     title 30 + label area 60 + intersection 30 + padding 40 = 240
     + 80 safety buffer (lighter than F14's 350 since CSS-only).
   - accepted_content_types = [text_block] only.
   - 4 sub_zones declared (circle_1/2/3 main_text + intersection emphasis).

4. scripts/smoke_frame_render.py — add bundled fixture for F12 self-check.

Verification :
- python -m py_compile src/phase_z2_mapper.py scripts/smoke_frame_render.py
  : PASS
- python scripts/smoke_frame_render.py --self-check : PASS 5/5 (F12 added
  at 3691 chars CSS-only)
- python scripts/smoke_frame_render.py construction_goals_three_circle_intersection
  --render-to data/runs/imp04_f12_visual : PASS, R3 artifact written. 0
  raster refs (CSS-only partial); copy_assets ran successfully and
  produced data/runs/imp04_f12_visual/assets/construction_goals_three_circle_intersection/
  with the frame's 4 PNG files (unused since partial is CSS-only — assets
  remain available for future raster promotion if visual inspection
  flags fidelity loss).
- python run_mdx03_pipeline.py --phase-z2 --run-id imp04_f12_regression
  : PASS (MDX 03 V4 rank-1 still F13/F29, F12 not selected — F12 only
  triggered by 02-1 / 01-1 sections per V4 evidence)

scope-lock honored : V4 logic / V4 evidence / mapper existing builders /
composition planner / Phase R' / pipeline production render path / AI/Kei
all unchanged. New builder added without modifying existing 3 (mixed
strategy per scope-lock §4).

Calibration status (matrix §4.1 Fix 7 4-class) :
- class 1 adapter readiness : new builder registered, partial loadable,
  contract valid, smoke passing.
- class 2 content-fit : compact 110×110 circles + label, watch for label
  overflow if MDX bullets exceed ~12 chars.
- class 3/4 mapping/routing : not applicable for this commit.
- Codex review mandatory per scope-lock §5 (new builder pattern
  cycle_intersect_3 first introduction).

Refs Gitea #4 (IMP-04 Track A frame 2 — V4 strongest UAI tier)

src/phase_z2_mapper.py

@@ -431,10 +431,65 @@ def _build_quadrant_flat_slots(section, units, contract) -> dict:
     return payload
 
 
+def _build_cycle_intersect_3(section, units, contract) -> dict:
+    """F12-style — cycle-3way-intersection. top_bullets 3 items → flat keyed
+    circle_1_label / circle_2_label / circle_3_label. *body 무시* (label only —
+    이 frame 의 3 메인 원 visual 은 label 만 사용). intersection 텍스트는 별
+    optional (default 빈 문자).
+
+    F16 quadrant_flat_slots 와 비교 :
+    - F16 : N=4 + body 사용 (quadrant_N_label + quadrant_N_body)
+    - F12 : N=3 + body 미사용 (circle_N_label 만) + intersection text 별
+
+    builder_options :
+      item_parser : ITEM_PARSERS key (label 만 사용, body 무시)
+      pad_to             : N (default=3) — units < N 이면 empty label 로 채움
+      truncate_at        : M (default=3) — units > M 이면 무시 + _truncated_count
+      label_key_pattern  : "circle_{n}_label" (n = 1-based)
+      empty_label        : pad slot 의 label 값 (default = "")
+      intersection_default : intersection 텍스트 (slot optional — default 빈 문자)
+    """
+    options = contract["payload"]["builder_options"]
+    parser_name = options["item_parser"]
+    parser = ITEM_PARSERS.get(parser_name)
+    if parser is None:
+        raise ValueError(
+            f"Contract '{contract['template_id']}' references item_parser='{parser_name}' "
+            f"but ITEM_PARSERS has no such entry."
+        )
+
+    pad_to = options.get("pad_to", 3)
+    truncate_at = options.get("truncate_at", pad_to)
+    label_key = options.get("label_key_pattern", "circle_{n}_label")
+    empty_label = options.get("empty_label", "")
+    intersection = options.get("intersection_default", "")
+
+    payload: dict = {}
+    payload.update(_resolve_title(section, contract["payload"], contract))
+
+    visible_units = list(units[:truncate_at])
+    parsed = [parser(u) for u in visible_units]
+
+    for i in range(pad_to):
+        n = i + 1
+        if i < len(parsed):
+            payload[label_key.format(n=n)] = parsed[i]["label"]
+        else:
+            payload[label_key.format(n=n)] = empty_label
+
+    payload["intersection"] = intersection
+
+    if len(units) > truncate_at:
+        payload["_truncated_count"] = len(units) - truncate_at
+
+    return payload
+
+
 PAYLOAD_BUILDERS: dict[str, Callable] = {
     "items_with_role": _build_items_with_role,
     "process_product_pair": _build_process_product_pair,
     "quadrant_flat_slots": _build_quadrant_flat_slots,
+    "cycle_intersect_3": _build_cycle_intersect_3,
 }