Hoan thien core finance v2

app/Models/PaymentScheduleItem.php

@@ -20,6 +20,21 @@ class PaymentScheduleItem extends Model
         'due_date' => 'date',
     ];
 
+    public function getPaidAmountAttribute(): float
+    {
+        // Nếu đã eager load payments, dùng collection sum để tránh query thêm
+        if ($this->relationLoaded('payments')) {
+            return (float) $this->payments->sum('amount');
+        }
+
+        return (float) $this->payments()->sum('amount');
+    }
+
+    public function getRemainingAmountAttribute(): float
+    {
+        return (float) $this->amount - $this->paid_amount;
+    }
+
     public function template()
     {
         return $this->belongsTo(PaymentTemplate::class);