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

hive-c0re/src/dashboard_events.rs

@@ -76,6 +76,13 @@ pub enum DashboardEvent {
         sha_short: Option<String>,
         diff: Option<String>,
         description: Option<String>,
+        /// Forge PR number, for `merge_config_pr` approvals only — lets
+        /// the live `applyApprovalAdded` path build the "review PR on
+        /// forge" link without waiting for a cold `/api/state` refresh
+        /// (mirrors `ApprovalView::pr_number`). `None` for every other
+        /// kind.
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pr_number: Option<u64>,
     },
     /// A pending approval transitioned to a terminal state
     /// (approved / denied / failed). Clients move the row out of the
@@ -346,6 +353,7 @@ mod tests {
                 sha_short: None,
                 diff: None,
                 description: None,
+                pr_number: None,
             },
             DashboardEvent::ApprovalResolved {
                 seq: 1,