Studio: make grid checkbox rectangular and commit table changes

database/migrations/2026_02_28_200000_create_artwork_metric_snapshots_hourly_table.php

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+<?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::create('artwork_metric_snapshots_hourly', function (Blueprint $table) {
+            $table->bigIncrements('id');
+            $table->unsignedBigInteger('artwork_id');
+            $table->dateTime('bucket_hour')->comment('Hour-precision bucket, e.g. 2026-02-28 14:00:00');
+            $table->unsignedBigInteger('views_count')->default(0);
+            $table->unsignedBigInteger('downloads_count')->default(0);
+            $table->unsignedBigInteger('favourites_count')->default(0);
+            $table->unsignedBigInteger('comments_count')->default(0);
+            $table->unsignedBigInteger('shares_count')->default(0);
+            $table->timestamp('created_at')->useCurrent();
+
+            $table->unique(['artwork_id', 'bucket_hour'], 'uq_artwork_bucket');
+            $table->index('bucket_hour', 'idx_bucket_hour');
+            $table->index(['artwork_id', 'bucket_hour'], 'idx_artwork_bucket');
+
+            $table->foreign('artwork_id')
+                ->references('id')
+                ->on('artworks')
+                ->cascadeOnDelete();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('artwork_metric_snapshots_hourly');
+    }
+};

database/migrations/2026_02_28_200001_add_heat_score_columns_to_artwork_stats.php

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+<?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_stats', function (Blueprint $table) {
+            $table->double('heat_score')->default(0)->after('engagement_velocity');
+            $table->timestamp('heat_score_updated_at')->nullable()->after('heat_score');
+            $table->unsignedInteger('views_1h')->default(0)->after('heat_score_updated_at');
+            $table->unsignedInteger('favourites_1h')->default(0)->after('views_1h');
+            $table->unsignedInteger('comments_1h')->default(0)->after('favourites_1h');
+            $table->unsignedInteger('shares_1h')->default(0)->after('comments_1h');
+            $table->unsignedInteger('downloads_1h')->default(0)->after('shares_1h');
+
+            $table->index('heat_score', 'idx_artwork_stats_heat_score');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('artwork_stats', function (Blueprint $table) {
+            $table->dropIndex('idx_artwork_stats_heat_score');
+            $table->dropColumn([
+                'heat_score',
+                'heat_score_updated_at',
+                'views_1h',
+                'favourites_1h',
+                'comments_1h',
+                'shares_1h',
+                'downloads_1h',
+            ]);
+        });
+    }
+};

database/migrations/2026_02_28_300000_create_rec_artwork_recs_table.php

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+<?php
+
+declare(strict_types=1);
+
+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::create('rec_artwork_recs', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('artwork_id');
+            $table->string('rec_type', 40); // similar_hybrid, similar_visual, similar_tags, similar_behavior
+            $table->json('recs');            // ordered array of artwork_ids
+            $table->string('model_version', 30)->default('sim_v1');
+            $table->dateTime('computed_at');
+            $table->timestamps();
+
+            $table->unique(['artwork_id', 'rec_type', 'model_version']);
+            $table->index(['artwork_id', 'rec_type']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('rec_artwork_recs');
+    }
+};

database/migrations/2026_02_28_300001_create_rec_item_pairs_table.php

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+<?php
+
+declare(strict_types=1);
+
+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::create('rec_item_pairs', function (Blueprint $table) {
+            $table->unsignedBigInteger('a_artwork_id');
+            $table->unsignedBigInteger('b_artwork_id');
+            $table->double('weight')->default(0);
+            $table->dateTime('updated_at');
+
+            $table->unique(['a_artwork_id', 'b_artwork_id']);
+            $table->index(['a_artwork_id', 'weight']);
+            $table->index('b_artwork_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('rec_item_pairs');
+    }
+};

database/migrations/2026_02_28_300002_create_rec_events_table.php

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+<?php
+
+declare(strict_types=1);
+
+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::create('rec_events', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('user_id')->nullable();
+            $table->string('session_id', 80)->nullable();
+            $table->string('event_type', 20); // view, favourite, download
+            $table->unsignedBigInteger('artwork_id');
+            $table->timestamp('created_at')->useCurrent();
+
+            $table->index(['artwork_id', 'created_at']);
+            $table->index(['user_id', 'created_at']);
+            $table->index(['session_id', 'created_at']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('rec_events');
+    }
+};