Studio: make grid checkbox rectangular and commit table changes

app/Models/RecArtworkRec.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * Precomputed recommendation list for an artwork.
+ *
+ * @property int         $id
+ * @property int         $artwork_id
+ * @property string      $rec_type       similar_hybrid|similar_visual|similar_tags|similar_behavior
+ * @property array       $recs           Ordered array of artwork IDs
+ * @property string      $model_version  e.g. "sim_v1"
+ * @property \Carbon\Carbon $computed_at
+ * @property \Carbon\Carbon $created_at
+ * @property \Carbon\Carbon $updated_at
+ *
+ * @property-read Artwork $artwork
+ */
+final class RecArtworkRec extends Model
+{
+    protected $table = 'rec_artwork_recs';
+
+    protected $fillable = [
+        'artwork_id',
+        'rec_type',
+        'recs',
+        'model_version',
+        'computed_at',
+    ];
+
+    protected $casts = [
+        'artwork_id'  => 'integer',
+        'recs'        => 'array',
+        'computed_at' => 'datetime',
+    ];
+
+    // ── Relations ──────────────────────────────────────────────────────────
+
+    public function artwork(): BelongsTo
+    {
+        return $this->belongsTo(Artwork::class, 'artwork_id');
+    }
+}