upgrade: adopt V8.31.1 (theme 1.3/1.4 redesigns, editor deep-canvas, guided launch, component library)

Overlay 190 upstream items (V8.22→8.31) preserving trade-pro theme,
registry tests, and design docs. Re-applied full patch set on identical
anchors (discovery/env_for/blocks.css/type-mapping/locale-override/
theme_color/frontend entries/test_theme_pro_v3 mods) plus compose pins.

Verified: theme suites 35/35; dual-baseline full run 415 passed vs
pristine 386+29 ours, FAILED-set diff EMPTY (same 10 Windows env fails).
Live: container 8.31.1-dev.1 healthy, hesupipe 192 entries intact,
trade-pro build 203 pages 0 errors.

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

app/builder.py

@@ -204,6 +204,7 @@ def build(site_id,mirror=False):
     if visuals.is_dir():
         shutil.copytree(visuals,dist/'assets'/'visual',dirs_exist_ok=True)
     shutil.copy2(ROOT/'app'/'static'/'pro.js',dist/'assets'/'pro.js')
+    shutil.copy2(ROOT/'app'/'static'/'auto31.js',dist/'assets'/'auto31.js')
     if (theme_dir/'pro.css').exists():
         shutil.copy2(theme_dir/'pro.css',dist/'assets'/'pro.css')
     else:
@@ -226,6 +227,7 @@ def build(site_id,mirror=False):
                f'.btn,.primary,.request,.button,.nav-btn{{background-color:{accent};border-radius:{button}}}'
                f'body .sf-canvas h1{{font-size:clamp(2.5rem,5vw,calc(4.8rem * var(--sf-heading-scale)))}}')
     (dist/'assets'/'custom.css').write_text(theme_css+responsive.site_css(records)+site_design_v87.responsive_css(site_design_v87.published(settings)),encoding='utf-8')
+
     # For installed theme packages, Jinja loads only the trusted included template.
     professional_template=(theme_dir/'pro.html').exists()
     if professional_template and site['theme'] not in theme_pro.THEMES:
@@ -393,6 +395,26 @@ def build(site_id,mirror=False):
     (dist/'404.html').write_text(missing_html,encoding='utf-8')
     # A complete static search page is packaged for every theme, not a live API.
     static_site.write_assets(dist,local_records)
+    # V8.31.1: only the opt-in automotive theme uses the single-request asset
+    # bundles. Older pinned theme versions retain their exact original HTML and
+    # resource order, so existing sites are not silently changed.
+    if site['theme']=='automotive' and (theme_dir/'manifest.json').is_file() and json.loads((theme_dir/'manifest.json').read_text(encoding='utf-8')).get('version')=='1.4.1':
+        # Preserve CSS cascade by concatenating precisely in template order.
+        css_names=('theme.css','blocks.css','factory.css','pro-base.css','pro.css','commercial.css','custom.css')
+        for resource in css_names:
+            if not (dist/'assets'/resource).is_file():
+                raise ValueError('汽车资源缺失: '+resource)
+        (dist/'assets'/'auto-compiled.css').write_text(
+            '\n'.join((dist/'assets'/name).read_text(encoding='utf-8') for name in css_names),encoding='utf-8')
+        js_names=('site-runtime.js','pro.js','auto31.js')
+        for resource in js_names:
+            if not (dist/'assets'/resource).is_file():
+                raise ValueError('汽车脚本资源缺失: '+resource)
+        (dist/'assets'/'auto-compiled.js').write_text(
+            '\n;\n'.join((dist/'assets'/name).read_text(encoding='utf-8') for name in js_names),encoding='utf-8')
+        shutil.copy2(theme_dir/'auto-icons.svg',dist/'assets'/'auto-icons.svg')
+
+
     if '/search/' not in route_set:
         search_file=dist/'search'/'index.html'
         search_file.parent.mkdir(parents=True,exist_ok=True)