feat: port cms home layout into trade-pro (hero/features/cards/cta + reveal JS)

Task 10a (Phase 3 first layout task). home.html now mirrors the cms
astro-site-runtime homepage section sequence: full-bleed hero (single
active slide; the platform has no multi-slide config, so the carousel
dots/JS are not ported), trustbar, two-col about with floating stats,
soft products band (4-card grid), dark applications band (2x2 case
tiles), advantages feature grid, soft news band (3-card grid), and the
closing cta band. Data maps to SiteForge context (page.cover/summary,
showcase, cases, stories, category/brand counts); empty sections hide
instead of rendering shells. All new component classes are sf-tp-*
prefixed and compose on the Task 8 base utilities in theme.css
(.wrap/.section/.eyebrow/.icon-circle/.sf-tp-btn).

CSS: the five cms components' scoped styles (PageHero, FeatureGrid,
CardGrid, Cta, SectionHead + the inline homepage bands) are extracted
into pro.css as the sf-tp-* component layer, tokens rewritten to
--sf-tp-*, breakpoints 900/767/620 preserved. theme.css accordingly
drops the superseded generic .cards/.card/.feature mobile baselines
and the .pro-home-hero em bridge, and retargets the dark-surface ghost
button hook from .cta-band to .sf-tp-cta.

Reveal: cms uses data-reveal everywhere; a ~15-line inline script at
the pro.html tail adds html.js + an IntersectionObserver that toggles
is-visible (the reduced-motion/no-JS exemptions already live in
theme.css from Task 8).

Tests: test_theme_registry gains test_trade_pro_home_layout_structure
(preview-render contract: sf-tp-hero, card grid, feature grid, cta,
no pro-industrial-hero residue, reveal script). The distinct-markup
tripwire in test_theme_pro_v3 is legitimately updated 4 -> 5 (renamed
to drop the stale "four"): with trade-pro now carrying its own
sf-tp-hero class, five themes yield five distinct hero signatures,
which is what the test always meant to enforce.

Co-Authored-By: Claude Code <noreply@anthropic.com>

tests/test_theme_registry.py

@@ -1,6 +1,7 @@
 """Theme discovery must be a single source of truth."""
 import json
 from pathlib import Path
+from bs4 import BeautifulSoup
 from app import core, theme_pro, theme_store
 from test_factory_v2 import factory, site  # noqa: F401 -- fixture + helper reused by trade-pro tests
 
@@ -153,6 +154,30 @@ def test_trade_pro_build_contains_tokens(factory):
     assert '--sf-tp-primary' in css.text  # Phase 2 短令牌别名随构建分发
     assert '--sf-tp-color-brand-primary' in css.text  # cms 令牌全集随构建分发
 
+def test_trade_pro_home_layout_structure(factory):
+    # Task 10a：home.html 移植 cms 首页设计后的结构契约（sf-tp-* 组件类，
+    # 数据区块由 preview 的 3 个演示产品驱动；无 pro-industrial-hero 残留）。
+    r = factory.get('/api/factory/themes/trade-pro/preview', params={'page_type': 'home'})
+    assert r.status_code == 200, r.text[:400]
+    soup = BeautifulSoup(r.text, 'html.parser')
+    assert soup.select_one('section.sf-tp-hero') is not None
+    assert 'pro-industrial-hero' not in r.text
+    assert soup.select_one('.sf-tp-hero .sf-tp-hero-copy[data-reveal] h1') is not None
+    assert soup.select_one('.sf-tp-hero .sf-tp-hero-overlay') is not None
+    assert len(soup.select('.sf-tp-trustbar .sf-tp-trust-item')) == 4
+    assert soup.select_one('.sf-tp-trust-item .icon-circle svg') is not None
+    assert soup.select_one('.sf-tp-two-col .sf-tp-copy .sf-tp-btn[href="/about/"]') is not None
+    assert soup.select_one('.sf-tp-section-head') is not None
+    cards = soup.select('.sf-tp-card-grid .sf-tp-card')
+    assert len(cards) == 3  # preview 提供 3 个演示产品
+    assert cards[0].select_one('.sf-tp-card-body .sf-tp-more[href]') is not None
+    assert soup.select_one('.sf-tp-feature-grid .sf-tp-feature .icon-circle svg') is not None
+    assert soup.select_one('.sf-tp-cta .sf-tp-btn--ghost[href="/contact/"]') is not None
+    # reveal 渐进增强（pro.html 尾部内联 JS）：html.js 开关 + IntersectionObserver
+    assert "classList.add('js')" in r.text and 'IntersectionObserver' in r.text
+    assert len(soup.find_all('h1')) == 1
+
+
 def test_frontend_entries_include_trade_pro():
     from pathlib import Path
     base = Path(__file__).resolve().parent.parent