feat(platform): fresh mail, pdf and storage implementation

app/Platform/Mail/Http/Requests/MailEnvironmentRequest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Platform\Mail\Http\Requests;
+
+use App\Platform\Mail\Application\MailConfigurationService;
+use Illuminate\Foundation\Http\FormRequest;
+
+/**
+ * Guards an installation-wide mail transport submission, checking it against
+ * the field set of whichever driver the payload names.
+ */
+class MailEnvironmentRequest extends FormRequest
+{
+    /**
+     * Access is gated by the controller's ability check, not here.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Delegate the rule set to the configuration service, which knows which
+     * fields belong to the driver being submitted.
+     */
+    public function rules(): array
+    {
+        $driver = $this->string('mail_driver')->toString();
+
+        return app(MailConfigurationService::class)->validationRules($driver);
+    }
+}