Add all files

app/Admin/Resources/CurrencyResource/Pages/CreateCurrency.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Admin\Resources\CurrencyResource\Pages;
+
+use App\Admin\Resources\CurrencyResource;
+use Filament\Resources\Pages\CreateRecord;
+
+class CreateCurrency extends CreateRecord
+{
+    protected static string $resource = CurrencyResource::class;
+}

app/Admin/Resources/CurrencyResource/Pages/EditCurrency.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Admin\Resources\CurrencyResource\Pages;
+
+use App\Admin\Resources\CurrencyResource;
+use Filament\Actions;
+use Filament\Resources\Pages\EditRecord;
+
+class EditCurrency extends EditRecord
+{
+    protected static string $resource = CurrencyResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        if (config('settings.default_currency') == $this->record->code) {
+            return [];
+        }
+
+        return [
+            Actions\DeleteAction::make(),
+        ];
+    }
+}

app/Admin/Resources/CurrencyResource/Pages/ListCurrencies.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Admin\Resources\CurrencyResource\Pages;
+
+use App\Admin\Resources\CurrencyResource;
+use Filament\Actions;
+use Filament\Resources\Pages\ListRecords;
+
+class ListCurrencies extends ListRecords
+{
+    protected static string $resource = CurrencyResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            Actions\CreateAction::make(),
+        ];
+    }
+}