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

app/Http/Controllers/Api/Tenant/EventAnalyticsController.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Http\Controllers\Api\Tenant;
+
+use App\Http\Controllers\Controller;
+use App\Models\Event;
+use App\Services\Analytics\EventAnalyticsService;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Illuminate\Support\Arr;
+
+class EventAnalyticsController extends Controller
+{
+    public function __construct(
+        private readonly EventAnalyticsService $analyticsService
+    ) {}
+
+    public function show(Request $request, Event $event): JsonResponse
+    {
+        // Check if package has advanced_analytics feature
+        $packageFeatures = $event->eventPackage?->package?->features ?? [];
+        // Handle array or JSON string features
+        if (is_string($packageFeatures)) {
+            $packageFeatures = json_decode($packageFeatures, true) ?? [];
+        }
+        
+        $hasAccess = in_array('advanced_analytics', $packageFeatures, true);
+
+        if (!$hasAccess) {
+             return response()->json([
+                'message' => 'This feature is only available in the Premium package.',
+                'code' => 'feature_locked'
+            ], 403);
+        }
+
+        $timeline = $this->analyticsService->getTimeline($event);
+        $contributors = $this->analyticsService->getTopContributors($event);
+        $tasks = $this->analyticsService->getTaskStats($event);
+
+        return response()->json([
+            'timeline' => $timeline,
+            'contributors' => $contributors,
+            'tasks' => $tasks,
+        ]);
+    }
+}