Fix fee calculation: use payments table (gross income - refunds)

Instead of reading invoices.total_amount, now queries the payments table:
- Sums inbound/confirmed payments (gross income)
- Subtracts inbound/refunded payments (refunds)
- Applies plan.platform_fee_percent on the net feeable amount
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Services/FeeCollectorService.php

@@ -32,25 +32,33 @@ public function pullFeesForDate(Instance $instance, string $date): ?PlatformFee
 
             config(["database.connections.instance_{$instance->id}" => $config]);
 
-            $result = DB::connection("instance_{$instance->id}")
-                ->table('invoices')
-                ->whereDate('created_at', $date)
-                ->where('status', '!=', 'cancelled')
-                ->selectRaw('COUNT(*) as count, COALESCE(SUM(total_amount), 0) as total')
+            $conn = DB::connection("instance_{$instance->id}");
+
+            $result = $conn->table('payments')
+                ->whereNull('deleted_at')
+                ->where('direction', 'inbound')
+                ->whereDate('payment_date', $date)
+                ->selectRaw("
+                    COUNT(*) FILTER (WHERE status = 'confirmed') as inbound_count,
+                    COALESCE(SUM(amount) FILTER (WHERE status = 'confirmed'), 0) as inbound_total,
+                    COALESCE(SUM(amount) FILTER (WHERE status = 'refunded'), 0) as refunded_total
+                ")
                 ->first();
 
             DB::disconnect("instance_{$instance->id}");
 
-            $totalAmount = (int) $result->total;
+            $grossIncome = (int) $result->inbound_total;
+            $refunds = (int) $result->refunded_total;
+            $feeableAmount = max(0, $grossIncome - $refunds);
             $feePercent = $instance->plan->platform_fee_percent ?? 0;
-            $feeAmount = (int) round($totalAmount * $feePercent / 100);
+            $feeAmount = (int) round($feeableAmount * $feePercent / 100);
 
             return PlatformFee::updateOrCreate(
                 ['instance_id' => $instance->id, 'date' => $date, 'source' => 'pull'],
                 [
-                    'total_transactions_amount' => $totalAmount,
+                    'total_transactions_amount' => $feeableAmount,
                     'fee_amount' => $feeAmount,
-                    'transaction_count' => (int) $result->count,
+                    'transaction_count' => (int) $result->inbound_count,
                     'verified' => true,
                 ]
             );