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>

tests/test_factory_v2.py

@@ -66,7 +66,8 @@ def test_complete_bootstrap_repeated_safe(factory):
     assert all(r['route'] for r in records)
     build=factory.post(f'/api/sites/{sid}/builds',json={}).json()
     html=factory.get(f'/preview/{sid}/{build["version"]}/').text
-    assert 'sf-site-head' in html and 'factory.css' in html
+    assert 'sf-site-head' in html
+    assert 'auto-compiled.css' in html or 'factory.css' in html
     assert factory.get(f'/preview/{sid}/{build["version"]}/assets/site-runtime.js').status_code==200
 
 def test_mapping_preview_commit_and_cross_site(factory):
@@ -104,7 +105,7 @@ def test_editor_supports_responsive_settings(factory):
     assert r.status_code==200,r.text
     preview=factory.post(f'/api/sites/{sid}/pages/{homepage["id"]}/editor-preview',json={'blocks':blocks,'page_template':'home'})
     assert preview.status_code==200
-    assert 'siteforge-inline-editor' in preview.text and '--sf-pad:19px' in preview.text
+    assert 'siteforge-studio-canvas' in preview.text and '--sf-pad:19px' in preview.text
     build=factory.post(f'/api/sites/{sid}/builds',json={}).json()
     css=factory.get(f'/preview/{sid}/{build["version"]}/assets/custom.css').text
     assert '--sf-pad:19px' in css and 'display:none' in css