chore: baseline V8.10.0-dev.1 with v8_workflows type-mapping fix and trade-pro spec

- SiteForge Enterprise V8.10.0-dev.1 upstream source (210 tests)
- Fix: v8_workflows._mapped_input now reads both 类型/分类 columns so WXR
  imports keep post/product types instead of collapsing to page
- Docs: trade-pro theme port spec (R3) and implementation plan

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

app/preview_rewrite.py

@@ -0,0 +1,44 @@
+"""Rewrite root-relative links only in the HTTP preview response.
+
+The published ZIP / immutable build files are never modified. Source element
+markup is preserved so that e.g. canonical links and SEO headers are not
+rewritten or reformatted by an HTML serializer.
+"""
+import re
+from html.parser import HTMLParser
+
+_ATTR = re.compile(r'''(?P<name>\b(?:href|src|action|poster))(?P<eq>\s*=\s*)(?P<q>["'])(?P<value>.*?)(?P=q)''', re.I | re.S)
+
+class _PreviewHTMLParser(HTMLParser):
+    def __init__(self, prefix):
+        super().__init__(convert_charrefs=False)
+        self.prefix=prefix
+        self.out=[]
+
+    def _start(self):
+        raw=self.get_starttag_text()
+        def replace(match):
+            url=match.group('value')
+            if url.startswith('/') and not url.startswith('//') and not url.startswith(self.prefix):
+                url=self.prefix + url.lstrip('/')
+            return match.group('name')+match.group('eq')+match.group('q')+url+match.group('q')
+        self.out.append(_ATTR.sub(replace,raw))
+
+    def handle_starttag(self,tag,attrs): self._start()
+    def handle_startendtag(self,tag,attrs): self._start()
+    def handle_endtag(self,tag): self.out.append(f'</{tag}>')
+    def handle_data(self,data): self.out.append(data)
+    def handle_comment(self,data): self.out.append(f'<!--{data}-->')
+    def handle_decl(self,decl): self.out.append(f'<!{decl}>')
+    def handle_entityref(self,name): self.out.append(f'&{name};')
+    def handle_charref(self,name): self.out.append(f'&#{name};')
+    def handle_pi(self,data): self.out.append(f'<?{data}>')
+    def unknown_decl(self,data): self.out.append(f'<![{data}]>')
+
+
+def rewrite_preview_html(document: str, site_id: str, build_id: str) -> str:
+    prefix=f'/preview/{site_id}/{build_id}/'
+    parser=_PreviewHTMLParser(prefix)
+    parser.feed(document)
+    parser.close()
+    return ''.join(parser.out)