fix auto complete final invoice

invoices/models.py

@@ -350,6 +350,11 @@ class InvoiceItem(BaseModel):
 
 class Payment(BaseModel):
     """مدل پرداخت‌ها"""
+    PAYMENT_STAGE_CHOICES = [
+        ('quote', 'پیش‌فاکتور'),
+        ('final_settlement', 'تسویه نهایی'),
+    ]
+    
     invoice = models.ForeignKey(Invoice, on_delete=models.CASCADE, related_name='payments', verbose_name="فاکتور")
     amount = models.DecimalField(max_digits=15, decimal_places=2, verbose_name="مبلغ پرداخت")
     direction = models.CharField(
@@ -370,6 +375,12 @@ class Payment(BaseModel):
         default='cash',
         verbose_name="روش پرداخت"
     )
+    payment_stage = models.CharField(
+        max_length=20,
+        choices=PAYMENT_STAGE_CHOICES,
+        default='quote',
+        verbose_name="مرحله پرداخت"
+    )
     reference_number = models.CharField(max_length=100, verbose_name="شماره مرجع", blank=True, unique=True)
     payment_date = models.DateField(verbose_name="تاریخ پرداخت")
     notes = models.TextField(verbose_name="یادداشت‌ها", blank=True)