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

resources/js/components/Topbar.jsx

@@ -1,7 +1,7 @@
 import React, { useState } from 'react'
 import SearchBar from '../Search/SearchBar'
 
-const DEFAULT_AVATAR = 'https://files.skinbase.org/avatars/default.webp'
+const DEFAULT_AVATAR = 'https://files.skinbase.org/default/avatar_default.webp'
 
 export default function Topbar({ user = null }) {
   const [menuOpen, setMenuOpen] = useState(false)