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

tests/Feature/Recommendations/HomepageForYouIntegrationTest.php

@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Models\Artwork;
+use App\Models\User;
+use App\Models\UserRecommendationCache;
+use App\Services\HomepageService;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Cache;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    config(['scout.driver' => 'null']);
+});
+
+it('allForUser includes a for_you key', function () {
+    $user = User::factory()->create();
+
+    Cache::flush();
+
+    $service = app(HomepageService::class);
+    $result  = $service->allForUser($user);
+
+    expect($result)->toHaveKey('for_you')
+        ->and($result['for_you'])->toBeArray();
+});
+
+it('allForUser for_you is an array even with no cached recommendations', function () {
+    $user    = User::factory()->create();
+    $service = app(HomepageService::class);
+
+    Cache::flush();
+
+    $result = $service->allForUser($user);
+
+    expect($result['for_you'])->toBeArray();
+});
+
+it('allForUser for_you returns items when cache exists', function () {
+    $user    = User::factory()->create();
+    $artwork = Artwork::factory()->create([
+        'is_public'    => true,
+        'is_approved'  => true,
+        'published_at' => now()->subHour(),
+    ]);
+
+    UserRecommendationCache::query()->create([
+        'user_id'              => $user->id,
+        'algo_version'         => (string) config('discovery.algo_version', 'clip-cosine-v1'),
+        'cache_version'        => (string) config('discovery.cache_version', 'cache-v1'),
+        'recommendations_json' => [
+            'items' => [
+                ['artwork_id' => $artwork->id, 'score' => 0.9, 'source' => 'profile'],
+            ],
+        ],
+        'generated_at' => now(),
+        'expires_at'   => now()->addMinutes(60),
+    ]);
+
+    Cache::flush();
+
+    $service = app(HomepageService::class);
+    $result  = $service->allForUser($user);
+
+    expect($result['for_you'])->toBeArray();
+    // At least one item should have the base shape (id, title, slug, url)
+    if (count($result['for_you']) > 0) {
+        expect($result['for_you'][0])->toHaveKeys(['id', 'title', 'slug', 'url']);
+    }
+});