fix(#1940): carry pr_number on the live approval_added event

hive-c0re/src/dashboard.rs

@@ -1663,7 +1663,15 @@ async fn post_request_spawn(
             // refetch. Spawn approvals carry no diff/sha.
             state
                 .coord
-                .emit_approval_added(id, &name, "spawn", None, None, None);
+                .emit_approval_added(crate::coordinator::ApprovalAdded {
+                    id,
+                    agent: &name,
+                    approval_kind: "spawn",
+                    sha_short: None,
+                    diff: None,
+                    description: None,
+                    pr_number: None,
+                });
             (StatusCode::OK, "ok").into_response()
         }
         Err(e) => error_response(&format!("request-spawn {name} failed: {e:#}")),