feat(homepage): Nova homepage layout — guest/auth split, mascot category tiles, 5-col artwork grids

- HomeController: is_logged_in now lives inside props JSON (not separate view var)
- HomepageService: allForUser() adds user_data, fresh, suggested_creators; auth
  payload includes is_logged_in:true; guest payload merged with is_logged_in:false
- getTrending/getFreshUploads/getFollowingFeed: limit 12→10 (2 clean rows of 5)
- New getUserData() — unread messages + notifications counts via DB
- New getSuggestedCreators() — top followed-count creators not yet followed, cached 5 min

React — new components:
- HomeWelcomeRow: greeting bar with avatar, unread message/notification badges, upload CTA
- HomeFromFollowing: art grid from followed creators with empty-state
- HomeTrendingForYou: personalized grid adapts heading/link to user's top tag
- HomeBecauseYouLike: secondary personalized section keyed on top tag
- HomeSuggestedCreators: 4-col creator cards with avatar, stats, View Profile link
- HomeCTA: gradient upload banner; guest sees Create Account second CTA
- HomeCategories: 5-tile static category grid with mascot images

React — updated:
- HomePage: split into GuestHomePage + AuthHomePage; routes on is_logged_in prop
- HomeHero: isLoggedIn prop; upload href gates on auth; CTA → /discover/trending
- HomeTrending: see-all → /discover/trending; grid 4→5 cols; slice to multiple of 5
- HomeFresh: see-all → /discover/fresh; grid 4→5 cols; slice to multiple of 5
- HomeFromFollowing/TrendingForYou/BecauseYouLike: 5-col grid, slice to multiple of 5
- HomeCategories: mascots per category (wallpapers/photography/skins/other), smaller tiles

app/Http/Controllers/Web/HomeController.php

@@ -17,7 +17,7 @@ final class HomeController extends Controller
         $user     = $request->user();
         $sections = $user
             ? $this->homepage->allForUser($user)
-            : $this->homepage->all();
+            : array_merge($this->homepage->all(), ['is_logged_in' => false]);
 
         $hero = $sections['hero'];
 
@@ -30,9 +30,8 @@ final class HomeController extends Controller
         ];
 
         return view('web.home', [
-            'meta'         => $meta,
-            'props'        => $sections,
-            'is_logged_in' => (bool) $user,
+            'meta'  => $meta,
+            'props' => $sections,
         ]);
     }
 }