feat: Nova homepage, profile redesign, and legacy view system overhaul

Homepage
- Add HomepageService with hero, trending (award-weighted), fresh uploads,
  popular tags, creator spotlight (weekly uploads ranking), and news sections
- Add React components: HomePage, HomeHero, HomeTrending, HomeFresh,
  HomeTags, HomeCreators, HomeNews (lazy-loaded below the fold)
- Wire home.blade.php with JSON props, SEO meta, JSON-LD, and hero preload
- Add HomePage.jsx to vite.config.js inputs

Profile page
- Hero banner with random user artwork as background + dark gradient overlay
- Favourites section uses real Artwork models + <x-artwork-card> for CDN URLs
- Newest artworks grid: gallery-grid → grid grid-cols-2 gap-4

Edit Profile page (user.blade.php)
- Add hero banner (featured wallpaper/photography via artwork_features,
  content_type_id IN [2,3]) sourced in UserController
- Remove bg-deep from outer wrapper; card backgrounds: bg-panel → bg-nova-800
- Remove stray AI-generated tag fragment from template

Author profile links
- Fix all /@username routes in: HomepageService, MonthlyCommentatorsController,
  LatestCommentsController, MyBuddiesController and corresponding blade views

Legacy view namespace
- Register View::addNamespace('legacy', resource_path('views/_legacy'))
  in AppServiceProvider::boot()
- Convert all view('legacy.x') and @include('legacy.x') calls to legacy::x
- Migrate legacy views to resources/views/_legacy/ with namespace support

app/Http/Controllers/Legacy/CategoryController.php

@@ -26,7 +26,7 @@ class CategoryController extends Controller
 
         // Expecting segments like ['category', '{contentType}', '{...categorySlugs}']
         if (count($segments) < 2 || strtolower($segments[0]) !== 'category') {
-            return view('legacy.placeholder');
+            return view('legacy::placeholder');
         }
 
         $parts = array_slice($segments, 1);
@@ -90,7 +90,7 @@ class CategoryController extends Controller
         $page_meta_description = $category->description ?? ($category->contentType->name . ' artworks on Skinbase');
         $page_meta_keywords = strtolower($category->contentType->slug) . ', skinbase, artworks, wallpapers, skins, photography';
 
-        return view('legacy.category', compact(
+        return view('legacy::category', compact(
             'page_title',
             'page_meta_description',
             'page_meta_keywords',
@@ -104,6 +104,6 @@ class CategoryController extends Controller
     public function browseCategories()
     {
         $data = $this->legacy->browseCategories();
-        return view('legacy.categories', $data);
+        return view('legacy::categories', $data);
     }
 }