Visual header, body, and footer composition screen.

* Drag-and-drop section ordering with automatic saving.
* Add existing reusable documents to regions.
* Remove placements without deleting documents.
* Create independent page-specific copies.
* Shared-document usage warnings.
* Document creation, duplication, deletion protection and filtering.
* Draft and published document states.
* Document and placement scheduling.
* Authenticated homepage preview.
* Draft sections displayed in preview with a clear draft marker.
* Content Composer added to the administration sidebar.
* Public rendering now respects:
    * Publication status
    * Future publication dates
    * Expiry dates
    * Placement start and end dates
    * Enabled state
* Original Saasland homepage remains as the fallback when no composition exists.

resources/themes/saasland/views/home.blade.php

@@ -13,6 +13,14 @@
     @if($hasComposition)
         {!! $contentRenderer->renderRegion($pageKey, 'body') !!}
     @else
-        @include('stylist-theme-saasland::legacy-home-content')
+        @include('stylist-theme-saasland::legacy-home-content', [
+            'enabled' => fn (string $key, bool $default = true) => filter_var($themeSettings[$key] ?? $default, FILTER_VALIDATE_BOOL),
+            'heroTitle' => filled($themeSettings['hero_title'] ?? null)
+                ? $themeSettings['hero_title']
+                : 'Transform Your Business With Our SaaS Solution',
+            'heroText' => filled($themeSettings['hero_description'] ?? null)
+                ? $themeSettings['hero_description']
+                : 'Streamline operations, boost productivity, and improve customer satisfaction with one connected platform built for modern teams.',
+        ])
     @endif
 @endsection