fix(gallery): fill tall portrait cards to full block width with object-cover crop

- ArtworkCard: add w-full to nova-card-media, use absolute inset-0 on img so
  object-cover fills the max-height capped box instead of collapsing the width
- MasonryGallery.css: add width:100% to media container, position img
  absolutely so top/bottom is cropped rather than leaving dark gaps
- Add React MasonryGallery + ArtworkCard components and entry point
- Add recommendation system: UserRecoProfile model/DTO/migration,
  SuggestedCreatorsController, SuggestedTagsController, Recommendation
  services, config/recommendations.php
- SimilarArtworksController, DiscoverController, HomepageService updates
- Update routes (api + web) and discover/for-you views
- Refresh favicon assets, update vite.config.js

database/migrations/2026_02_27_103655_create_user_reco_profiles_table.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Phase 1 recommendation engine: user preference cache table.
+ *
+ * Stores pre-computed tag/category/creator affinity profiles so that
+ * the "For You" feed can be generated without heavy joins on every request.
+ *
+ * TTL enforcement: the application checks `updated_at` + config TTL to decide
+ * whether to rebuild.  A background job (or on-demand compute) refreshes stale rows.
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('user_reco_profiles', function (Blueprint $table): void {
+            $table->unsignedBigInteger('user_id')->primary();
+            $table->json('top_tags_json')->nullable()->comment('Top tag slugs ordered by weighted score (up to 20)');
+            $table->json('top_categories_json')->nullable()->comment('Top category slugs ordered by weight (up to 5)');
+            $table->json('followed_creator_ids_json')->nullable()->comment('Followed creator IDs (up to 50)');
+            $table->json('tag_weights_json')->nullable()->comment('Normalised tag slug → weight map');
+            $table->json('category_weights_json')->nullable()->comment('Normalised category slug → weight map');
+            $table->json('disliked_tag_ids_json')->nullable()->comment('Hidden/blocked tag slugs (future use)');
+            $table->timestamps();
+
+            $table->foreign('user_id')
+                ->references('id')
+                ->on('users')
+                ->cascadeOnDelete();
+
+            $table->index('updated_at', 'urp_updated_at_idx');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('user_reco_profiles');
+    }
+};