:bug: add SoftDeletes

api-v13/app/Models/Chat.php

@@ -3,12 +3,13 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\SoftDeletes; // ← 加这行
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Support\Str;
 
 class Chat extends Model
 {
-    use HasFactory;
+    use HasFactory, SoftDeletes;
 
     protected $fillable = [
         'uid',