Fix Dashboard 500: Payment relationship is 'creator' not 'createdBy'

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Livewire/Dashboard.php

@@ -118,7 +118,7 @@ public function render()
 
         $recentPayments = Payment::where('status', 'confirmed')
             ->when($branchId, fn ($q) => $q->where('branch_id', $branchId))
-            ->with('createdBy')
+            ->with('creator')
             ->orderByDesc('created_at')
             ->limit(5)
             ->get();