refactor: Update code to use str() instead of Str::of() for string manipulation

app/Models/LocalPersistentVolume.php

@@ -4,7 +4,6 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Support\Str;
 
 class LocalPersistentVolume extends Model
 {
@@ -33,14 +32,14 @@ class LocalPersistentVolume extends Model
     protected function name(): Attribute
     {
         return Attribute::make(
-            set: fn (string $value) => Str::of($value)->trim()->value,
+            set: fn (string $value) => str($value)->trim()->value,
         );
     }
 
     protected function mountPath(): Attribute
     {
         return Attribute::make(
-            set: fn (string $value) => Str::of($value)->trim()->start('/')->value
+            set: fn (string $value) => str($value)->trim()->start('/')->value
         );
     }
 
@@ -49,7 +48,7 @@ class LocalPersistentVolume extends Model
         return Attribute::make(
             set: function (?string $value) {
                 if ($value) {
-                    return Str::of($value)->trim()->start('/')->value;
+                    return str($value)->trim()->start('/')->value;
                 } else {
                     return $value;
                 }