feat: artwork page carousels, recommendations, avatars & fixes

- Infinite loop carousels for Similar Artworks & Trending rails
- Mouse wheel horizontal scrolling on both carousels
- Author avatar shown on hover in RailCard (similar + trending)
- Removed "View" badge from RailCard hover overlay
- Added `id` to Meilisearch filterable attributes
- Auto-prepend Scout prefix in meilisearch:configure-index command
- Added author name + avatar to Similar Artworks API response
- Added avatar_url to ArtworkListResource author object
- Added direct /art/{id}/{slug} URL to ArtworkListResource
- Fixed race condition: Similar Artworks no longer briefly shows trending items
- Fixed user_profiles eager load (user_id primary key, not id)
- Bumped /api/art/{id}/similar rate limit to 300/min
- Removed decorative heart icons from tag pills
- Moved ReactionBar under artwork description

app/Http/Controllers/Api/ArtworkCommentController.php

@@ -37,14 +37,19 @@ class ArtworkCommentController extends Controller
         $page     = max(1, (int) $request->query('page', 1));
         $perPage  = 20;
 
-        $comments = ArtworkComment::with(['user', 'user.profile'])
+        // Only fetch top-level comments (no parent). Replies are recursively eager-loaded.
+        $comments = ArtworkComment::with([
+                'user', 'user.profile',
+                'approvedReplies',
+            ])
             ->where('artwork_id', $artwork->id)
             ->where('is_approved', true)
+            ->whereNull('parent_id')
             ->orderByDesc('created_at')
             ->paginate($perPage, ['*'], 'page', $page);
 
         $userId = $request->user()?->id;
-        $items  = $comments->getCollection()->map(fn ($c) => $this->formatComment($c, $userId));
+        $items  = $comments->getCollection()->map(fn ($c) => $this->formatComment($c, $userId, true));
 
         return response()->json([
             'data' => $items,
@@ -66,10 +71,25 @@ class ArtworkCommentController extends Controller
         $artwork = Artwork::public()->published()->findOrFail($artworkId);
 
         $request->validate([
-            'content' => ['required', 'string', 'min:1', 'max:' . self::MAX_LENGTH],
+            'content'   => ['required', 'string', 'min:1', 'max:' . self::MAX_LENGTH],
+            'parent_id' => ['nullable', 'integer', 'exists:artwork_comments,id'],
         ]);
 
         $raw = $request->input('content');
+        $parentId = $request->input('parent_id');
+
+        // If replying, validate parent belongs to same artwork and is approved
+        if ($parentId) {
+            $parent = ArtworkComment::where('artwork_id', $artwork->id)
+                ->where('is_approved', true)
+                ->find($parentId);
+
+            if (! $parent) {
+                return response()->json([
+                    'errors' => ['parent_id' => ['The comment you are replying to is no longer available.']],
+                ], 422);
+            }
+        }
 
         // Validate markdown-lite content
         $errors = ContentSanitizer::validate($raw);
@@ -82,6 +102,7 @@ class ArtworkCommentController extends Controller
         $comment = ArtworkComment::create([
             'artwork_id'       => $artwork->id,
             'user_id'          => $request->user()->id,
+            'parent_id'        => $parentId,
             'content'          => $raw,      // legacy column (plain text fallback)
             'raw_content'      => $raw,
             'rendered_content' => $rendered,
@@ -103,7 +124,7 @@ class ArtworkCommentController extends Controller
             );
         } catch (\Throwable) {}
 
-        return response()->json(['data' => $this->formatComment($comment, $request->user()->id)], 201);
+        return response()->json(['data' => $this->formatComment($comment, $request->user()->id, false)], 201);
     }
 
     // ─────────────────────────────────────────────────────────────────────────
@@ -139,7 +160,7 @@ class ArtworkCommentController extends Controller
 
         $comment->load(['user', 'user.profile']);
 
-        return response()->json(['data' => $this->formatComment($comment, $request->user()->id)]);
+        return response()->json(['data' => $this->formatComment($comment, $request->user()->id, false)]);
     }
 
     // ─────────────────────────────────────────────────────────────────────────
@@ -162,14 +183,15 @@ class ArtworkCommentController extends Controller
     // Helpers
     // ─────────────────────────────────────────────────────────────────────────
 
-    private function formatComment(ArtworkComment $c, ?int $currentUserId): array
+    private function formatComment(ArtworkComment $c, ?int $currentUserId, bool $includeReplies = false): array
     {
         $user     = $c->user;
         $userId   = (int) ($c->user_id ?? 0);
         $avatarHash = $user?->profile?->avatar_hash ?? null;
 
-        return [
+        $data = [
             'id'               => $c->id,
+            'parent_id'        => $c->parent_id,
             'raw_content'      => $c->raw_content ?? $c->content,
             'rendered_content' => $c->rendered_content ?? e(strip_tags($c->content ?? '')),
             'created_at'       => $c->created_at?->toIso8601String(),
@@ -184,5 +206,15 @@ class ArtworkCommentController extends Controller
                 'avatar_url'  => AvatarUrl::forUser($userId, $avatarHash, 64),
             ],
         ];
+
+        if ($includeReplies && $c->relationLoaded('approvedReplies')) {
+            $data['replies'] = $c->approvedReplies->map(fn ($r) => $this->formatComment($r, $currentUserId, true))->values()->toArray();
+        } elseif ($includeReplies && $c->relationLoaded('replies')) {
+            $data['replies'] = $c->replies->map(fn ($r) => $this->formatComment($r, $currentUserId, true))->values()->toArray();
+        } else {
+            $data['replies'] = [];
+        }
+
+        return $data;
     }
 }

app/Http/Controllers/Api/RankController.php

@@ -106,6 +106,7 @@ class RankController extends Controller
             $keyed = Artwork::whereIn('id', $ids)
                 ->with([
                     'user:id,name',
+                    'user.profile:user_id,avatar_hash',
                     'categories' => function ($q): void {
                         $q->select(
                             'categories.id',

app/Http/Controllers/Api/SimilarArtworksController.php

@@ -88,7 +88,7 @@ final class SimilarArtworksController extends Controller
             ->paginate(200, 'page', 1);
 
         $collection = $results->getCollection();
-        $collection->load(['tags:id,slug', 'stats']);
+        $collection->load(['tags:id,slug', 'stats', 'user:id,name', 'user.profile:user_id,avatar_hash']);
 
         // ── PHP reranking ──────────────────────────────────────────────────────
         // Weights: tag_overlap ×0.60, orientation_bonus +0.10, resolution_bonus
@@ -146,6 +146,8 @@ final class SimilarArtworksController extends Controller
                 'slug'        => $item['artwork']->slug,
                 'thumb'       => $item['artwork']->thumbUrl('md'),
                 'url'         => '/art/' . $item['artwork']->id . '/' . $item['artwork']->slug,
+                'author'      => $item['artwork']->user?->name ?? 'Artist',
+                'author_avatar' => $item['artwork']->user?->profile?->avatar_url,
                 'author_id'   => $item['artwork']->user_id,
                 'orientation' => $this->orientation($item['artwork']),
                 'width'       => $item['artwork']->width,