feat(v5.10.0): v5.4.0 + v5.5.0 features — backlinks, page/collection duplication, trash purge, version history, markdown import, embed/bookmark/video/audio blocks, cover & icon, OG metadata

- Migration v7: page_versions table + pages.cover_url/page_icon columns
- Trash service (purge_expired 30-day) + daily scheduler
- Board API: duplicate page, backlinks, versions (snapshot/list/restore), cover/icon upload, markdown/file import
- Collections API: duplicate collection (deep copy properties/views/pages/data sources)
- Export service: render embed/bookmark/video/audio in markdown/HTML/PDF/public
- Public page renderer: cover image + icon
- Editor: slash commands for media blocks, lightbox, version history UI, backlinks panel, cover/icon picker, import modal
- OG metadata endpoint for bookmark cards
- 386 tests passing

app/routers/dashboard.py

@@ -2022,7 +2022,7 @@ async def public_published_page(request: Request, slug: str):
 
     with get_conn() as conn:
         row = conn.execute(
-            "SELECT id, title, content, content_format, updated_at, created_at "
+            "SELECT id, title, content, content_format, updated_at, created_at, cover_url, page_icon "
             "FROM pages WHERE publish_slug=? AND is_published=1",
             (slug,),
         ).fetchone()
@@ -2060,6 +2060,8 @@ h1{font-size:3rem;opacity:.3}</style></head><body><h1>404</h1></body></html>""",
         content_html=content_html,
         updated_at=page.get("updated_at", ""),
         created_at=page.get("created_at", ""),
+        cover_url=page.get("cover_url", ""),
+        page_icon=page.get("page_icon", ""),
     )
 
 
@@ -2169,9 +2171,66 @@ def _render_blocks_public(blocks: list) -> str:
             alt = b.get("alt", "")
             html_parts.append(
                 f'<figure style="margin:16px 0;text-align:center;">'
-                f'<img src="{src}" alt="{alt}" style="max-width:100%;border-radius:8px;">'
+                f'<img src="{src}" alt="{alt}" data-full="{src}" style="max-width:100%;border-radius:8px;cursor:zoom-in;">'
                 f'</figure>'
             )
+        elif t == "video":
+            src = b.get("src", "")
+            if src:
+                html_parts.append(
+                    f'<video controls preload="metadata" style="max-width:100%;border-radius:8px;display:block;margin:12px auto;">'
+                    f'<source src="{src}"></video>'
+                )
+        elif t == "audio":
+            src = b.get("src", "")
+            if src:
+                html_parts.append(
+                    f'<audio controls preload="metadata" style="width:100%;margin:8px 0;"><source src="{src}"></audio>'
+                )
+        elif t == "bookmark":
+            url = b.get("url") or b.get("src") or ""
+            title = b.get("title") or url
+            desc = b.get("description") or ""
+            img = b.get("image") or ""
+            site = b.get("site_name") or ""
+            img_html = (
+                f'<img src="{img}" alt="" style="width:120px;height:90px;object-fit:cover;border-radius:8px;flex-shrink:0;">' if img else ""
+            )
+            desc_html = f'<div style="font-size:13px;opacity:.75;margin-top:4px;">{desc}</div>' if desc else ""
+            site_html = f'<div style="font-size:11px;opacity:.5;text-transform:uppercase;letter-spacing:.5px;margin-top:6px;">{site}</div>' if site else ""
+            html_parts.append(
+                f'<a href="{url}" target="_blank" rel="noopener noreferrer" style="text-decoration:none;color:inherit;">'
+                f'<div style="display:flex;gap:14px;align-items:center;border:1px solid rgba(255,255,255,.12);border-radius:10px;'
+                f'padding:14px 16px;margin:14px 0;background:rgba(255,255,255,.03);">'
+                f'<div style="flex:1;min-width:0;"><div style="font-weight:600;font-size:15px;">{title}</div>'
+                f'{desc_html}{site_html}</div>{img_html}</div></a>'
+            )
+        elif t == "embed":
+            url = b.get("src", "")
+            emb = b.get("embed_type") or ""
+            if emb in ("inline_dbs", "collection"):
+                html_parts.append('<div>[Embedded content]</div>')
+            elif emb == "download":
+                html_parts.append(
+                    f'<a href="{url}" download style="display:inline-block;margin:12px 0;color:var(--accent,#4c9aff);">⬇ {b.get("file_name") or "Download"}</a>'
+                )
+            elif emb == "pdf" and url:
+                html_parts.append(
+                    f'<iframe src="{url}" style="width:100%;height:70vh;border:none;border-radius:8px;margin:12px 0;"></iframe>'
+                )
+            elif url:
+                from app.services.embeds import embed_src
+                src = embed_src(url) or url
+                height = b.get("height") or 520
+                try:
+                    height = int(height)
+                except (ValueError, TypeError):
+                    height = 520
+                html_parts.append(
+                    f'<div style="position:relative;width:100%;height:{height}px;border-radius:8px;overflow:hidden;'
+                    f'background:#0a0a0a;"><iframe src="{src}" loading="lazy" frameborder="0" '
+                    f'style="position:absolute;inset:0;width:100%;height:100%;" allowfullscreen allow="autoplay; encrypted-media; picture-in-picture"></iframe></div>'
+                )
         else:
             html_parts.append(f'<p style="margin:4px 0;line-height:1.7;">{c}</p>')
     return "\n".join(html_parts)