Add NAS file manager integration and all pending platform changes

- Installed p7h/nas-file-manager package via private VCS repo
- Published config/nas-file-manager.php with super_admin middleware restriction
- Added NAS env vars to .env.example
- Created admin/nas-storage page with connection info panel and file browser widget
- Added NAS Storage link to admin sidebar (super_admin only)
- Added SuperAdminController@nasStorage method and admin.nas-storage route
- Includes all accumulated branch changes: profile wall, 2FA, audit logs,
  settings panel, country/phone/timezone components, posts, slideshow,
  playlist shares, video downloads/shares, comment likes, notifications,
  social links, and more

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

app/Mail/NewVideoNotification.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Mail;
+
+use App\Models\Video;
+use App\Models\User;
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class NewVideoNotification extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public function __construct(public Video $video, public User $uploader)
+    {
+    }
+
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: $this->uploader->name . ' just uploaded a new video on ' . config('app.name'),
+        );
+    }
+
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.new-video-notification',
+        );
+    }
+}