Studio: make grid checkbox rectangular and commit table changes

app/Observers/ArtworkFavouriteObserver.php

@@ -4,6 +4,8 @@ declare(strict_types=1);
 
 namespace App\Observers;
 
+use App\Jobs\RecComputeSimilarByBehaviorJob;
+use App\Jobs\RecComputeSimilarHybridJob;
 use App\Models\ArtworkFavourite;
 use App\Services\UserStatsService;
 use Illuminate\Support\Facades\DB;
@@ -24,6 +26,9 @@ class ArtworkFavouriteObserver
         if ($creatorId) {
             $this->userStats->incrementFavoritesReceived($creatorId);
         }
+
+        // §7.5 On-demand: recompute behavior similarity when artwork reaches threshold
+        $this->maybeRecomputeBehavior($favourite->artwork_id);
     }
 
     public function deleted(ArtworkFavourite $favourite): void
@@ -42,4 +47,22 @@ class ArtworkFavouriteObserver
 
         return $id !== null ? (int) $id : null;
     }
+
+    /**
+     * Dispatch on-demand behavior recomputation when an artwork crosses a
+     * favourites threshold (5, 10, 25, 50 …).
+     */
+    private function maybeRecomputeBehavior(int $artworkId): void
+    {
+        $count = (int) DB::table('artwork_favourites')
+            ->where('artwork_id', $artworkId)
+            ->count();
+
+        $thresholds = [5, 10, 25, 50, 100];
+
+        if (in_array($count, $thresholds, true)) {
+            RecComputeSimilarByBehaviorJob::dispatch($artworkId)->delay(now()->addSeconds(30));
+            RecComputeSimilarHybridJob::dispatch($artworkId)->delay(now()->addMinute());
+        }
+    }
 }