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/Models/ArtworkComment.php

@@ -31,6 +31,7 @@ class ArtworkComment extends Model
 		'legacy_id',
 		'artwork_id',
 		'user_id',
+		'parent_id',
 		'content',
 		'raw_content',
 		'rendered_content',
@@ -51,6 +52,27 @@ class ArtworkComment extends Model
 		return $this->belongsTo(User::class);
 	}
 
+	public function parent(): BelongsTo
+	{
+		return $this->belongsTo(self::class, 'parent_id');
+	}
+
+	public function replies(): HasMany
+	{
+		return $this->hasMany(self::class, 'parent_id')->orderBy('created_at');
+	}
+
+	/**
+	 * Recursively eager-load approved replies (tree structure).
+	 */
+	public function approvedReplies(): HasMany
+	{
+		return $this->hasMany(self::class, 'parent_id')
+			->where('is_approved', true)
+			->orderBy('created_at')
+			->with(['user.profile', 'approvedReplies']);
+	}
+
 	public function reactions(): HasMany
 	{
 		return $this->hasMany(CommentReaction::class, 'comment_id');