fix(analytics): include username on page_generated events

Umami creator labels read event_data.username; server events only sent
owner_label, so dashboards fell back to MindSpace UUID path segments.

Co-authored-by: Cursor <cursoragent@cursor.com>

mindspace-rybbit.mjs

@@ -60,6 +60,7 @@ export function sendMindSpaceRybbitEvent({
   const owner = pseudonymizeAnalyticsId(ownerId, config.idSecret);
   if (!owner) return Promise.resolve(false);
   const endpoint = `${String(config.rybbitUrl || 'https://rybbit.tkmind.cn').replace(/\/$/, '')}/api/track`;
+  const username = resolveAnalyticsOwnerLabel({ displayName: ownerLabel });
   const payload = {
     site_id: String(config.siteId),
     type: 'custom_event',
@@ -76,7 +77,8 @@ export function sendMindSpaceRybbitEvent({
       agent_run_id: String(agentRunId || ''),
       channel,
       owner_segment: String(ownerSegment || 'unknown'),
-      owner_label: resolveAnalyticsOwnerLabel({ displayName: ownerLabel }),
+      username,
+      owner_label: username,
     }),
   };
   return fetch(endpoint, {