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

database/migrations/2026_02_28_000001_add_parent_id_to_artwork_comments_table.php

@@ -0,0 +1,25 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    public function up(): void
+    {
+        Schema::table('artwork_comments', function (Blueprint $table) {
+            $table->unsignedBigInteger('parent_id')->nullable()->after('user_id');
+            $table->foreign('parent_id')->references('id')->on('artwork_comments')->onDelete('cascade');
+            $table->index('parent_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('artwork_comments', function (Blueprint $table) {
+            $table->dropForeign(['parent_id']);
+            $table->dropIndex(['parent_id']);
+            $table->dropColumn('parent_id');
+        });
+    }
+};