Refactor resource files: remove unused imports and clean up code across various resource and controller files for improved readability and maintainability. Update currency list formatting in helpers for consistency.

app/Filament/Resources/AuthorResource.php

@@ -3,7 +3,6 @@
 namespace App\Filament\Resources;
 
 use App\Filament\Resources\AuthorResource\Pages;
-use App\Filament\Resources\AuthorResource\RelationManagers;
 use App\Models\Author;
 use Filament\Forms;
 use Filament\Forms\Components\FileUpload;
@@ -14,8 +13,6 @@ use Filament\Resources\Resource;
 use Filament\Tables;
 use Filament\Tables\Columns\ImageColumn;
 use Filament\Tables\Table;
-use Illuminate\Database\Eloquent\Builder;
-use Illuminate\Database\Eloquent\SoftDeletingScope;
 
 class AuthorResource extends Resource
 {
@@ -25,8 +22,7 @@ class AuthorResource extends Resource
 
     protected static ?string $navigationGroup = 'News';
 
-    public static function form(Form $form):
-    Form
+    public static function form(Form $form): Form
     {
         return $form
             ->schema([