phase z slide_base + token CSS + families 갱신 (5-layer + F29 fix)

- templates/phase_z2/slide_base.html — geometry 재정상화:
  divider top 58 / height 2 / #cbd5e1
  body top 76 / height 585 / left 50 / width calc(100%-100px)
  footer left 50 / bottom 8 / height 41 / width calc(100%-100px)
  (사용자 lock 2026-05-07 — front 정합)
- templates/styles/tokens/{spacing,typography}.css — 5-layer 위계 lock 반영:
  spacing : --slide-divider-top 58 / --slide-body-top 76 / --slide-body-height 585 /
            --slide-footer-bottom 8 (slide_base.html 와 1:1)
  typography : --font-zone-title 16px (대) / --font-sub-title 12px (소) /
               --font-body 10px (콘텐츠) — 5-layer (대/중/소/부소/콘텐츠)
- templates/phase_z2/families/three_parallel_requirements.html — F13 partial:
  cleanup-1 (2026-05-08) stale 주석 정정 (Legacy templates/blocks/structures/
  prerequisites-3col.html reference 제거 — 해당 legacy 폴더 삭제 후 broken).
- templates/phase_z2/families/process_product_two_way.html — F29 partial:
  visual fidelity bug fix (2026-05-08).
  missing SVG asset 3 개 (header_left_bg, header_right_bg, body_bg) 참조 제거 →
  figma origin (figma_to_html_agent/blocks/1171281210/index.html) 의 R8 룰
  ("순수 CSS 우선") 따라 linear-gradient + border-radius pill 로 재현.
  PROMOTED 줄도 갱신 (banner-left/right bg gradient + body bg 2-half gradient).

regression 0 (MDX03 fresh run 검증 — final.html PASS, missing image 0).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

templates/phase_z2/slide_base.html

@@ -52,14 +52,14 @@
       left: 50px; top: 58px;
       width: calc(100% - 100px);
       height: 2px;
-      background: #1e293b;
+      background: #cbd5e1;
       z-index: 2;
     }
     .slide-body {
       position: absolute;
-      left: 40px; top: 65px;
-      width: calc(100% - 80px);   /* 1200 */
-      height: 590px;
+      left: 50px; top: 76px;
+      width: calc(100% - 100px);  /* 1180 */
+      height: 585px;
       z-index: 1;
       overflow: hidden;
     }
@@ -199,9 +199,9 @@
     /* ── Footer pill — feedback-3: body 와 weight balance, 살짝 가벼워짐 ── */
     .slide-footer {
       position: absolute;
-      left: 60px; bottom: 8px;
-      width: calc(100% - 120px);
-      height: 32px;                          /* was 41px */
+      left: 50px; bottom: 8px;
+      width: calc(100% - 100px);             /* front 기준 (body 와 정렬) */
+      height: 41px;                          /* front 기준 */
       border-radius: 999px;
       overflow: hidden;
       z-index: 2;