feat: C2C商家交易系统后端 — API+后台管理

app/C2cMerchant.php

@@ -0,0 +1,13 @@
+<?php
+namespace App;
+use Illuminate\Database\Eloquent\Model;
+
+class C2cMerchant extends Model
+{
+    protected $table = 'c2c_merchant';
+    protected $fillable = [
+        'name','logo','available_qty','min_amount','max_amount','unit_price',
+        'crypto_currency','fiat_currency','payment_methods','rating',
+        'contact_type','contact_link','status','sort'
+    ];
+}