create show api

app/Models/SystemMessage.php

@@ -2,13 +2,23 @@
 
 namespace App\Models;
 
+use Database\Factories\SystemMessageFactory;
+use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Facades\Storage;
 
 class SystemMessage extends Model
 {
-    /** @use HasFactory<\Database\Factories\SystemMessageFactory> */
+    /** @use HasFactory<SystemMessageFactory> */
     use HasFactory;
 
     protected $guarded = [];
+
+    protected function voice(): Attribute
+    {
+        return Attribute::make(
+            get: fn($value) => $value == null ? null : Storage::disk('public')->url($value)
+        );
+    }
 }