chore: initial commit of existing codebase

app/Models/PaymentReceipt.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class PaymentReceipt extends Model
+{
+    use HasFactory;
+
+    protected $fillable = ['sales_invoice_id', 'customer_id', 'receipt_date', 'amount', 'payment_method', 'reference_number', 'notes', 'created_by'];
+
+    protected $casts = [
+        'receipt_date' => 'date',
+        'amount' => 'decimal:2',
+    ];
+
+    public function salesInvoice()
+    {
+        return $this->belongsTo(SalesInvoice::class);
+    }
+
+    public function customer()
+    {
+        return $this->belongsTo(Customer::class);
+    }
+
+    public function createdBy()
+    {
+        return $this->belongsTo(\App\Models\User::class, 'created_by');
+    }
+}