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-analytics.mjs

@@ -123,6 +123,9 @@ export function sendMindSpaceAnalyticsEvent({
   const owner = resolveAnalyticsIdentity(ownerId, config);
   if (!owner) return Promise.resolve(false);
   const endpoint = `${String(config.analyticsUrl || 'http://127.0.0.1:3100').replace(/\/$/, '')}/api/send`;
+  // Umami Memind dashboards resolve「创建用户」from event_data.username (not owner_label).
+  // Keep owner_label for backward compatibility; never omit username on generation events.
+  const username = resolveAnalyticsOwnerLabel({ displayName: ownerLabel });
   const payload = {
     website: config.websiteId,
     id: owner,
@@ -137,7 +140,8 @@ export function sendMindSpaceAnalyticsEvent({
       channel,
       owner_segment: String(ownerSegment || 'unknown'),
       plan_type: String(planType || 'unknown'),
-      owner_label: resolveAnalyticsOwnerLabel({ displayName: ownerLabel }),
+      username,
+      owner_label: username,
       generated_at: String(generatedAt || ''),
       identity_mode: config.identityMode === 'raw' ? 'raw' : 'pseudonymous',
     },