Move home/post detail/like rendering from Python to .sx defcomps

- Home page: inline shared helpers, render_to_sx("blog-home-main")
- Post detail: new ~blog-post-detail-content defcomp with data from service
- Like toggle: call render_to_sx("market-like-toggle-button") directly
- Add post_meta_data() and post_detail_data() to BlogPageService

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

blog/services/blog_page.py

@@ -355,6 +355,78 @@ class BlogPageService:
             "sumup_configured": sumup_configured,
         }
 
+    def post_meta_data(self, post, base_title):
+        """Compute SEO meta tag values from post dict."""
+        import re
+        from quart import request as req
+
+        is_public = post.get("visibility") == "public"
+        is_published = post.get("status") == "published"
+        email_only = post.get("email_only", False)
+        robots = "index,follow" if (is_public and is_published and not email_only) else "noindex,nofollow"
+
+        desc = (post.get("meta_description") or post.get("og_description") or
+                post.get("twitter_description") or post.get("custom_excerpt") or
+                post.get("excerpt") or "")
+        if not desc and post.get("html"):
+            desc = re.sub(r'<[^>]+>', '', post["html"])
+        desc = desc.replace("\n", " ").replace("\r", " ").strip()[:160]
+
+        image = (post.get("og_image") or post.get("twitter_image") or post.get("feature_image") or "")
+        canonical = post.get("canonical_url") or (req.url if req else "")
+
+        post_title = post.get("meta_title") or post.get("title") or ""
+        page_title = f"{post_title} \u2014 {base_title}" if post_title else base_title
+        og_title = post.get("og_title") or page_title
+        tw_title = post.get("twitter_title") or page_title
+        is_article = not post.get("is_page")
+
+        return {
+            "robots": robots, "page_title": page_title, "desc": desc,
+            "canonical": canonical,
+            "og_type": "article" if is_article else "website",
+            "og_title": og_title, "image": image,
+            "twitter_card": "summary_large_image" if image else "summary",
+            "twitter_title": tw_title,
+        }
+
+    def post_detail_data(self, post, user, rights, csrf, blog_url_base):
+        """Serialize post detail view data for ~blog-post-detail-content defcomp."""
+        slug = post.get("slug", "")
+        is_admin = rights.get("admin") if isinstance(rights, dict) else getattr(rights, "admin", False)
+        user_id = getattr(user, "id", None) if user else None
+
+        # Tags and authors
+        tags = []
+        for t in (post.get("tags") or []):
+            name = t.get("name") or getattr(t, "name", "")
+            fi = t.get("feature_image") or getattr(t, "feature_image", None)
+            tags.append({"name": name, "src": fi or "", "initial": name[:1] if name else ""})
+        authors = []
+        for a in (post.get("authors") or []):
+            name = a.get("name") or getattr(a, "name", "")
+            img = a.get("profile_image") or getattr(a, "profile_image", None)
+            authors.append({"name": name, "image": img or ""})
+
+        return {
+            "slug": slug,
+            "is_draft": post.get("status") == "draft",
+            "publish_requested": post.get("publish_requested", False),
+            "can_edit": is_admin or (user_id is not None and post.get("user_id") == user_id),
+            "edit_href": f"{blog_url_base}/{slug}/admin/edit/",
+            "is_page": bool(post.get("is_page")),
+            "has_user": bool(user),
+            "liked": post.get("is_liked", False),
+            "like_url": f"{blog_url_base}/{slug}/like/toggle/",
+            "csrf": csrf,
+            "custom_excerpt": post.get("custom_excerpt") or "",
+            "tags": tags,
+            "authors": authors,
+            "feature_image": post.get("feature_image"),
+            "html_content": post.get("html", ""),
+            "sx_content": post.get("sx_content", ""),
+        }
+
     async def preview_data(self, session, *, slug=None, **kw):
         """Build preview data with prettified/rendered content."""
         from quart import g