feat(topology): persist complete diagram semantics

topology_api/queries/snapshot_queries.py

@@ -247,10 +247,22 @@ def fetch_layout():
                 dn.component_id,
                 c.component_key,
                 dn.x, dn.y, dn.width, dn.height,
-                dn.style_key, dn.label_override, dn.z_index
+                dn.style_key, dn.label_override, dn.z_index,
+                dn.display_meta, dn.display_hint, dn.decorations,
+                members.member_keys
             FROM diagram_layouts dl
             JOIN diagram_nodes dn ON dn.layout_id = dl.id
             LEFT JOIN components c ON c.id = dn.component_id
+            LEFT JOIN LATERAL (
+                SELECT ARRAY_AGG(
+                    member_component.component_key
+                    ORDER BY member.display_order
+                ) AS member_keys
+                FROM diagram_node_members member
+                JOIN components member_component
+                    ON member_component.id = member.component_id
+                WHERE member.diagram_node_id = dn.id
+            ) members ON true
             WHERE dl.base_id = (SELECT id FROM bases WHERE code = 'guanghan')
               AND dl.is_default = true
             ORDER BY dn.z_index, dn.node_key
@@ -275,5 +287,9 @@ def fetch_layout():
                 "styleKey": row["style_key"],
                 "labelOverride": row["label_override"],
                 "zIndex": row["z_index"],
+                "displayMeta": row["display_meta"],
+                "displayHint": row["display_hint"],
+                "decorations": row["decorations"] or {},
+                "memberKeys": row["member_keys"] or [],
             })
         return {"layout": layout_info, "nodes": nodes} if layout_info else None