feat: implement advanced analytics for mobile admin dashboard

This commit includes:
- Backend EventAnalyticsService and Controller
- API endpoint for event analytics
- Frontend EventAnalyticsPage with custom bar charts and top contributor lists
- Analytics shortcut on the dashboard
- Feature-lock upsell UI for non-premium users

resources/js/admin/api.ts

@@ -2856,6 +2856,35 @@ export async function removeEventMember(eventIdentifier: number | string, member
     throw new Error('Failed to remove member');
   }
 }
+export type AnalyticsTimelinePoint = {
+  timestamp: string;
+  count: number;
+};
+
+export type AnalyticsContributor = {
+  name: string;
+  count: number;
+  likes: number;
+};
+
+export type AnalyticsTaskStat = {
+  task_id: number;
+  task_name: string;
+  count: number;
+};
+
+export type EventAnalytics = {
+  timeline: AnalyticsTimelinePoint[];
+  contributors: AnalyticsContributor[];
+  tasks: AnalyticsTaskStat[];
+};
+
+export async function getEventAnalytics(slug: string): Promise<EventAnalytics> {
+  const response = await authorizedFetch(`${eventEndpoint(slug)}/analytics`);
+  const data = await jsonOrThrow<EventAnalytics>(response, 'Failed to load analytics');
+  return data;
+}
+
 type CacheEntry<T> = {
   value?: T;
   expiresAt: number;